Field notes and maps from Glass Mountains, West Texas, 1967
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The Smithsonian Institution Archives welcomes personal and educational use of its collections unless otherwise noted. For commercial uses, please contact photos@si.edu. Glass Mtns.
Chinati Mtns.
Sierra del Norte
Guadalupes
1967
[[back of folded topographic map]]
[[margin note]] Texas Monument sprgs. [[square symbol representing 'Ranch']] top 1/3 [[/note]]
[[image - topographical map of Brewster County Monument Spring Quadrangle with various notations]]
[[image - topographical map showing Wolf Camp Hills, Old Word Ranch, and various notations]]
5750 75 ---- 5675
[[Folded map that can not be seen unless unfolded]]
[[Various numeric notations at top of page, see below]]
[[Far left at top]] 160÷32 [[/Far left at top]]
90'
5025
360'
5375 360
----
5735
5025
---- 760
5300
5210 45
----
5165
1 mm = 50'
[[Text of map upside down]]
[[Visible text of map]] ...or larger. In addition to the area covered by topographic map about 11,300 square miles of southeastern Alaska has been covered by planimetric maps of scales of 1/125,000 and 1/250,000.
The Hawaiian Islands have been surveyed, and the resulting maps are published on a scale of 1.62,500.
[[line across page]]
[[image]] City or village
[[image]] Roads and buildings
[[image]] Ruins
Cliff dwelling
[[image]] Good motor road
Poor private [[text cut off]]
[[image]] Ford
[[image]]
Dam Dam with lock
[[image]] Canal lock (point upstream)
[[image and text cut off]]
[[image]] Boundary monument
[[image]] Bench mark (supplementary bench mark shown by cross and black figures without lettering
[[image]] Cemeteries
[[image]] Church, Sc [[text cut off]] (distinguishes [[cut off]]
RELIEF (printed in brown)
[[image]] Elevation above mean sea level
(in black on recent maps)
[[image]] Contours (Contours showing depth of water printed in blue)
Depression contours
[[/end text of map]]
[[image - topographical map showing Cathedral Mtn, Sullivan Ranch, and various notations]] _______ | 160
90'
5025
360' 5375 360
----- 5735 5025
----- 760
1 mm = 50'
5300
5210 45
----
5165
[[image - topographical map showing Iron Mtn, Skinner Ranch with various notations]]
[[circled]] 1 [[/circled]]
March 17
Left Washington on flight 157 (TWA) and landed in Albuquerque at about 2 P.M. about 1/2 hour late. Picked up car and boxes and went on to Socorro. Visited Flowers in evening. Went to Van Horn for night on the next day. On the 17th of March arrived in Marathon at noon. Went out to Dugout Mtn. Visited locality 733j. Unable to get more of the Cescinophora[[??]] bed. This is a fine bioherm with detrital beds wrapped over it.
[[margin]]739g =[[/margin] ]M1767 - a small bioherm near bottom of Sullivan Peak member contains Scacclinella [[??]]. This is about 100 yards west of the 733j locality.
March 18
[[margin]]737b[[/margin]] M1867 - Beds with Waagenoceras [[??]] and other Word fossils a few feet under the Cretaceous
[[margin]]737c[[/margin]] M 1867[[superscript]]1[[/superscript]] - Smooth black ls weathering into lumps with Ammontes & Fusulines. Lumps weather ash gray contain ammonites: Paraceltites and ammonites with fine revolving lines. Same as seen with [[Furnish?]] and forming top of Road Canyon.
[[circled]] 2 [[/circled]] 737d
M18672 - Fusulines just over lip of hill all Road Canyon. Down back slope of hill there must be about 20' of rocks before the ammonite bed. The latter as a guess is 5 - 8' thick.
[[sketch of geologic column in left margin]]
Section at M18672
---------|
M18671 | A
---------|
28' | B
---------|
12' | C
---------| 3' | D
---------|
18' | E
---------| 6' | F
---------|
10' | G
---------|
16' | H
---------| I |
65' |
---------|
M18674 |
Cgl & SS | J J |
[[end of sketch]]
A = Ammonite bed 8' +-
B = Heavy bedded ls mixed with some siliceous rock bedding irregular some siliceous material. Bed B has about 15; beyond the lip of the hill. Fusulines (M18672) taken about 5' starting above edge of hill & 10 - 15' below Ammonites bed.
C - platy siliceous, yellow shaley rock about 12', Top five feet covered. Also has considerable heavy bedded ls lenses.
D - 3' heavy band
E - Upper part mainly massive bedded ls blocky, granular separated by yellow platy shale. Lower part massive granular limestone from which came M18673 = 737e
F - covered.
G - finely granular block ls brown weathering [[five words erased]]
H 16' Showing some massive ls ledges
737e = M18673 - take 50' below top of ledge in bed E
737f = M18674 Penciclarosis[[guess]] at top of cgl.
[[encircled]] 3 [[/encircled]]
I - 65' of yellow silicious shale and blue shale mostly on a covered slope.
J. Sandstone, brown and brown cgl filling valley and slope of hill opposite.
Dick saw Coscinophora on the slope, undoubtedly from Road Canyon.
Shale around tank that we saw some years ago is undoubtedly Leonard.
737g = M18675 - About 450 feet above house on road just at Y forming the loop to the windmill above the house at the head of the ravine. Road Canyon just above house but at Road y comes the black, gray - weathering limestone with ammonites that forms the top of the Road Canyon. This is sandwiched between siliceous beds and is about 30 feet thick. Covers 25' of out crop at top of Knob.
737h = M18676 - uppermost heavy ls of Road Canyon on road 230 feet above the house.
[[left margin]] 27 paces below An [[/left margin]]
[[left margin]] 180 paces = 450' above house to Ammonites [[/left margin]]
M18677 - Fusulines from low in Road Canyon just NW of house.
=737i
180 65
---- 115
230
[[encircled]] 4 [[/encircled]]
Road canyon occupies the knob just NW of house it appears in road 280 above house and runs for 65 paces to the Y forming the loop around the windmill.
The combination of Road Canyon ls and Cathedral Mtn ss and cgl has proved common in the area NW of Dugout Mtn. Apparently there is no full section of Word except at high hill with knot of Capitan.
[[left margin]] 736x= [[/margin]] M18678 - 4 blocks from 700v.
March 19
[[left margin]] 737j = [[/margin]] M1967 - Stated at just of low foothill in chain at base of Del Nortes. Front of low hill (A) is composed of dolomitzed massive conglomerate of large limestone pebbles and small siliceous pebbles. This may be the Sullivan Peaks or possible ls 2 (of King's Leonard). Back slope of knob is brownish orange siliceous rock followed by sandstone and shale.
A limestone, very sandy to conglomeratic 5 - 6' thick follows. From this we took numerous ammonites similar to those from Leonard 2 or 3 of PBK.
[[margin]] 737j [[/margin]] Above this limestone the rock is mostly silty-sandy
[[encircled]] 5 [[/encircled]]
shale, rather soft and crumbly but culminating is a 30' sandstone yellowish and fairly hard. Between the ammonite beds and the sandstone there are alternations of shale and sand, the latter often containing fair-sized plant stems. Other than plants we saw no fossils in the sandstone.
Ravine above ss is debris choked but showed sandy shale and some sandstone. But at 127' above the sand came a cgl. for about 15' and then what appears definitely to be Cretaceous. Permian float occurs in the ravine, good limestone, some with silicified fossils.
Gully just N of one with thick ss.
A = Conglomerate with huge mass of cosimophora and other Permian. Possibly basal cretaceous.
B covered
C-Biohermal type beds with Composita, Edicosteges, Peniculannis
D-Mealy limy ss and sandy limestone with a few fossils
E Sandstone & shale. I guess that D is about 50' above the thick ss in the
[[image, diagram of geologic column]]
M19672 |
Cret. |
--------|
10' +/- |A
--------|
40' +/- |B |
--------|
25-30' |C
--------|
10-12' |D
--------| |E
[[/image]]
[[encircled]] 6 [[/encircled]]
next gully South.
[[left margin]] 737K [[/margin]] M19671 - Ammonite bed east of M1987
The knobs forming the front of the hills here have vertical bedding. About 75' of cgl. ls, ls pebbles & silicious pebbles up to 3 or more inches form the front 3rd of the hill. The middle 3rd is brown silicious rock. In the last 3rd a limestone bed of 8 or 10' and vertical forms the backside of the hill. This ls is followed by more silicious beds but these are not vertical. They dip at a strong angle into the Del Nortes. The front 3rd is all dolomitized
732j - Appears on back slope of hill rimming valley. The Road Canyon appears as two limestones. The 732j is the very top of the second or uppermost ls. Just below the beds with collimatus appear cobbly black limestone, weathering gray. This ls. contains the same ammonites we have collected on the top of the Road Canyon in the exposures seen yesterday at the house and the locality to which we took Furnish & Glenster
[[left margin]] Ammonite bed = 737-Z [[/margin]]
[[encircled]] 7 [[encircled]]
Remarks on March 19, 67 - The vertical massive beds tipped up along the mountain front suggest Sullivan Peak. The beds are so dolomitized that we could not find any fossils in it. I was unable to find diagnostic brachiopods in the ammonite beds although we saw what looked like Peniculauris and Torynechus, a fragment. This suggests Bed 3 of King. The tipped up beds on the front might be bed 2 which has some biohermal material in it.
On the way up the Mountain we found a loose [[underlined]] Institella [[/underlined]] as float under the big sandstone but we could not find it in any of the limestones. I think the upper limestone is probably Wedin but can't be sure. [[underlined]] Edriosteges [[/underlined]] was common in biohermal limestone and [[underlined]] Coscinophora [[/underlined]] occurred just under or in the Cretaceous. The uppermost beds under the Cretaceous may be a basal conglomerate, certainly there was a variety of pebbles in the conglomerate.
[[circled]] 8 [[/circled]]
March 20
M2067
[[sketch of geologic section in left margin]] | A
--------| 6 - 7' | B
--------| 2' +- | C
--------| 1' | D
--------|
M20671 | = [[circled]] 751n [[pencil]] 751n [[pen]] [[/circled]] 20' +- | E
--------|
M20672 | = 737o | F
--------| 20' | G
--------|
M 20673 | = 737p 75' | H
--------| 50' | I
--------|
15 - 20'| J |
[[end of sketch]]
A - siliceous rock mostly yellow orange to brick red weathering
B - 6 - 7' variable limestone, many}
fusulines, fine-grained to coarsely} M2607 737m
granular. Contains small Enteletes}
and is same bed as 732j.
C - 2' +- bluish to black blocky ls with ammonites.
D - limestone fine grained, irregular bedding.
E - 20 - 25' of bluish to black, blocky limestone with ammonites. Same bed as top of Road Canyon and at 732j. M20672 = 737o
F - 12' Granular ls with fusulines (M20672) Bottom bed 1 1/2 with thick siliceous skins.
G - 20 siliceous thin platy, buff to yellowish shale
H - 75' Thick bedded limestones dark, with fusulines separated by siliceous shale. 7 beds in all. M20673 is from topmost bed. M20674 is from 4th bed from top. = 737q
I - covered slope with 50' of sandy shale some blue [[?]] when fresh. Probably Leonard
[[encircled]] 9 [[/encircled]]
J. Sandstone 15' - 20' of Cathedral Mtn.
M20675 = 737r
Hill 4861 - S 55[[degree symbol]] W =
Hill old Payne R - S 81[[degree symbol]] W
Top Dugout - N 70[[degree symbol]] W
Top of long spur with uppermost orange cherty rock. Then 20' +/- of blue blocky ls. with ammonites near top of Road Canyon. Fusulines in with Ammonites come from 20' below top of RC.
R.C at least 100' thick in several ledges.
[[left margin]] 737s [[/margin]]
Peinniates bed = M20676 - N85W- almost due west of new house on road. From knob 4861 it is S50W. About 1/4 mile west of work shed.
[[left margin]] 1000' west of work shed [[/margin]]
Dolomitic ls with coarse pebbles and abundance of Ammonites
M20677 - E side road about 1/2 mile S of new house contact of cut on Word. Ls on NW flank of hill with Word ss
1' congl. between.
[[left margin encircled]] 10 [[/left margin encircled]]
March 21
West end bluff ca 1/2 E of creek junction, bluff opened by slide About 50' up hill is sandy shale & ls. Then comes a 50' massive ls Bottom of big mass of coarse cobbles. On top of mounds comes limestone in beds up to 15" and thick-bedded chert, the chert 3 - 4' thick. Bedded ls 50' +-
M2167 - From loose blocks on slope just W of 728 - Z.
M21671 - lowest beds in Creek just west of 728 - Z - Yellow-weathering blue shale.
M21672 - Fusulines from a boulder in cgl. under bioherm at 728 - Z
M21673 - Loose piece with Institella found at 728 - Z.
[[margin]] 738g [[/margin]]
M21674 - Loose piece 100 feet above bioherms.
Spent day at west end Chinati hills. Collected four pieces from large [[underlined]] Leptodus [[/underlined]] block. [[underlined]] Scacchinella [[/underlined]] fairly common
[[left margin encircled]] 11 [[/left margin encircled]]
as crackout material. Saw none silicified. Silicifination not common in bioherms at west end of Chinati hill.
Biolerms overlie cgl. and also at 50 - 100' of shale and thin-bedded limestone in the area from 728 - Z and west.
March 22.
The loose specimens collected in Chinatis (728j?) are rather from the Alta fm. than from the Cibolo. Our collection this year is M2267
[[margin blue]] 738h [[/margin blue]]
[[margin blue]] 738i [[/margin blue]]
Sponge is M22671 - float on slope under largest bioherm, first one west of volcanic plug.
[[margin blue]] 738j [[/ margin blue]]
M22672 - Breccia zone on slope just west of large bioherm of M22
Slopes between 728 - Z & M22 thick bio.
[[margin blue]] 738k [[/margin blue]]
M22673 - About 25' below the Liosotella bed.
[[margin blue]] 738-Z [[/margin blue]]
M22674 - Beds with Liosotella about 125 above the uppermost bioherm.
[[margin blue]] 738m [[/margin blue]]
M22675 - About middle of thin-bedded member of Cibolo in a
[[encircled]] 12 [[/encircled]]
thick lenticular lime. M22[[superscript]] 4 [[/superscript]] & M23[[superecript]] 5 [[/superecript]] suggests Road Canyon.
[[left margin]] 738n [[/left margin]]
M22676 - About 50' below the breccia or cgl. under the big bioherms, under bioherm just E of the largest one and west of the Ignenous plug
[[left margin]] 739m [[/left margin]]
M22677 - Bioherms on hill east of biggest bioherm.
Cibolo fm - Udden 1400'
5 Yellow massive ls 650'
4 Thin bedded zone 450'
3 Spicule zone 85'-160'
2 Lower Brecciated zone 133'- massive ls. & breccia
1 Transition beds 100' gray to yel sh., ss & ls.
In morning went over slope west of largest bioherm and slopes below largest bioherm. In afternoon collected some limestones at about mid slope, about half way up in the "thin-bedded zone" exposed above the bioherm just west of the largest one. These contain a [[underlined]] Liosotella [[/underlined]] that looks to me to be a Road Canyon one. Later in afternoon went on a hunt for [[underline]] Scacchinella [[/underline]]. We started on a slope just east of
[[left margin encircled]] 13 [[/left margin encircled]]
volcanic plug (Tig) one mile east of the west end of the Permian hill. On this slope the bioherm is small but we found abundant [[underlined]] Scacchinella [[/underlined]] in it. About 50' under this bioherm occurs the transition beds with a profusion of crinoid stems and other fossils Large [[underlined]] Heliospongian [[/underlined]] was found loose on the slope. We also found [[underlined]] Scacchinella [[/underlined]] fairly common in the breccia beds. Also large fusulines identified as Wolfcamp. The bioherms overly these beds. The transition beds may be Lenox Hills fm. whereas the Bioherms may really be the Decie Ranch.
In the breccia forming the base of the largest bioherms we saw boulders with [[underlined]] Scacchinella. [[/underlined]] One boulder, about 3 - 4' in one direction abounded in crinoid stems and [[underlined]] Scacchinella [[/underlined]] and is identical to the crinoid - stem - [[underlined]] Scacchinella [[/underlined]] beds seen in the next bioherm to the east mentioned above. These boulders were derived from the bioherms and are essentially contemporaneous with them
[[encircled]] 14 [[/encircled]]
March 23
Rain
March 24
On west side largest bioherm near gully collected beds with [[underline]] Institella.[[/underline]]
[[sketch of geologic column in left margin]] | G
----------| 35 | F
Rhipidom. |
----------| 30 |
Ammonites | E
Perrinites|
----------|
M2467 | D
----------| 20 | C
----------| 2 | B
----------| 50'+ | A |
[[end of sketch]]
A = large bioherm
B - 2 - 3' of limestone granular, coarse grained with long spicules
C - 20'+- orange brown chert also with spicules
D - Thin band of ls. 1/2 - 1' thick with occasional ammonites & brachiopod especially Institella. = M2467 = 738o
E - 30' of chert, yellow siliceous shale and occasional ls. band, with occasional ammonite - one Perrinites = M24671 = 738p
F = 30 - 35' of blocky calcarenite with occasional fossils. Small Rhipidomella seen and [[underline]] Perrinites [[/underline]]
G - Thin platy shale of laminated zone.
B-F = spicule zone and this must certainly be Leonard in age.
[[circled]] 15 [[/circled]]
Up ravine past igneous plugs.
Saw same section as elsewhere. Went up thru thick bioherm with Scacchinella in lower part. Saw no good silicified pieces. Above the ls. bed with spicules comes thick chert capped by a sandbank type bioherm with Perrinites at top. This is followed by the thin bedded zone.
[[sketch of geologic column in left margin]]
Spicule bed
--------------|
ls 30' |
--------------|
Chert & |
occasional ls.|
--------------|
Bioherm | |
[[/sketch]]
M24672 [[insert]] = 738q [[/insert]] - is 2 small pieces of ls from between the chert and the bioherm = basal spicule bed. Contains some fusulines. Ammonite from top of spicule zone.
Between the spicule bed and the bioherm is much rubble from the bioherm.
Biggest bioherm is at north bend of stream.
[[margin note]] 738r = [[/note]] M24673 - Slope exactly 1/2 mile E of the igneous plug - 3 blocks.
[[margin note]] 738s [[/note]] M24674 - 1 1/2 miles E of plug, near top of bioherms.
[[margin note]] 738t [[/note]] M24675 - Float from transition zone, 1/2 mile E of volcanic plug.
[[circled]] 16 [[/circled]]
[[margin]] 738u [[/margin]] M24676 - Perrinites from limestone capping zone of spicules at loc. M2467.
[[margin]] 735v [[/margin]] M24677 - Perrinites from limestone capping zone of spicules at locality 1 1/2 mile E of the plug.
[[margin]] 738w [[/margin]] M24678 - Just above base of spicule zone, just west of biggest bioherm.
The uppermost limestone 30' thick of the spicular bed makes hogbacks behind & above the bioherms.
The bioherms are semi lenticular and have a general uniform or nearly so thickness. They are based on rubble having enormous blocks 6 or more feet in one direction. Between them there is also much rubble. Just W of the largest bioherm the base of the spicule zone rests on the top of the bioherm but westward from the top of the bioherm the space between the largest bioherms & that next to it is filled by reef rubble. The ravines cutting the lower Cibolo are on small faults or through the rubble. The basal beds of the rubble have large crinoid stems
[[sketch in left margin showing bioherm, spicule bed and rubble described above]]
[[left margin encircled]] 17 [[/left margin encircled]]
as pebbles as well as pieces with large fusulines like those in the Transition zone. We found Scacchinella in the transition zone and some of the Scacchinella blocks in the basal rubble of the brecciated zone may be derived from the transition zone. Other [[underlined]] Scacchinella [[/underlined]] blocks especially those with abundant crinoid stems. At the locality 1 1/4 east of plug found Scacchinella at very top of bioherm.
The spicule bed contains Institella near the bottom but I did not see it higher in the section. Rhipidomella occurs also in this bed and denotes Cathedral Mtn.
Check R. E. King's Shafter species.
[[circled]] 18 [[/circled]]
March 25 - Section next to ravine
[[sketch of geologic column in left margin]]
--------- |
3'=======| E
---------| | D
---------| | | | | |
---------| | C
---------| | | | | |
---------|
30' | B = Chert
---------| | Breccia |
[[/sketch]]
About 30' of heavy-bedded chert above gravel, boulder bed of Breccia zone. Contains lenses of ls. one about 20' above base with Xestosia. Heavy chert with lenticular ls. at top. With ammonites
C = 40+- Thin-bedded shale & chert with thin ls at top 3' +-?
D - 40' of [[insert]] paper [[/insert]] thin bedded sh with occasional ss bed, none very thick.
E - About 50' dark gray calcarenite with few fossils and these mostly broken. Some dark chert. Occasional Richtofenids.
Above E comes cherty brown, thick bedded siliceous rock with papery siliceous shale. 20' + 100 paces = 250' + 20' more to a biohermal layer with considerable sand - makes a hump. E estimated at 160' - Upper part E is sandstone.
F = hump at 20'+-? This might be Cretaceous.
[[left margin encircled]] 19 [[/left margin encircled]]
No recognizable fossils in the bioherm but numerous ghosts of gastropods - look like Bellerophonts. This stuff is almost certainly Cretaceous.
The biggest bioherm is 1/2 mile west of the plug and just east of big bend in the creek.
[[left margin blue]] 738x [[/left margin blue]]
M25672 Fusulines from 6 - 8" bed about 30' (50' stratigraphically) below the dolomite of the yellow beds on hill facing ravine on W side of highest bioherm.
[[left margin blue]] 738y [[/left margin blue]]
M25673 - 10' below top of thick ls and 170' feet below the dolomite of the "Yellow beds". on hill facing raving on W side of highest bioherm
[[left margin blue]] 738z [[/left margin blue]]
M25671 - Fusulines from thick limestone in midst of thin bedded zone in hill above the highest bioherm.
[[left margin encircled]] 20 [[/left margin encircled]]
March 26
Narrows of Cibolo Creek - variegated red & yellow dolomite, a great reefy mass overlying flat-bedded, blocky dark ls. weathering light gray. Forms a bluff about 175' at it highest in the narrows.
Contact of reef & limestone irregular. We were unable to make out any major fault. Many minor displacements as one might expect on a reef. South end with cross - bedding. Reefs overlain by thin-bedded layers. We measured with 30[[degree symbol]] dip along creek about 240' total thickness of this part of the Cibolo. Udden gave 650' but this seems excessive
Look up C. P. Ross 1943 for specimens from the Chinati Mtns.
The hill at the west end of the Permian band look to be about 400' high and the rock seems to spread out but we saw no unusual structure
At M2667 a 15 - 20' bed of ls comes to the stream level. This is full of fusulines and the limestone looks like the
[[left margin encircled]] 21 [[/left margin encircled]]
beds with fusulines and suggests the fusuline bed at M25673
On the west side of Cibolo Creek at the narrows is a small hill possibly 100 feet high which shows flat bedded blocky dark limestone in layers of an inch to nearly a foot, very hard weathering light gray. This is overlain by massive reef limestone or rather dolomite. We saw no fossils. This hill is exactly like that across the creek where the supposed thrust is located. The dolomite is lithological like that of the "Yellow" beds. This is a normal sequence and it seems to me that both sides of the creek are lined by the same rocks
The rough section of the Chinati sequence seems as follows:
[[encircled]] 22 [[/encircled]] |-----------| ?| 200' | yellow reef dolomite x-----------| | | Thin bedded zone of Udden | | given as 450' from bottom RC| 445' | 55' sh, 80' of ls (Fuselines | | M25671); 15' Liosotella; | | 100' sh & ls; 20' massive ls | | Fuselines; 180' shale & ss x-----------| |85' - 160' | Spicule zone - chert at base | | with Institella - ls | | near middle with Perrinites | | & 30' - 50' ls at top with CM| | Perrinites | | X-----------| DR| 130' | Breccia & "reef" zone X-----------| WC| 100 | Transition beds - with 10 | | 15' limy zone near middle | |
[[left margin, vertical with arrow under]] WC [[/left margin]]
[[left margin encircled]] 23 [[/left margin encircled]]
March 27
About 30' heavy-bedded chert with ls lenses containing fusulines - few other fossils seen, none recognizable.
[[left margin blue]] 739a [[/left margin blue]]
M2767 - lowest fusuline bed
[[left margin blue]] 739b [[/left margin blue]]
M27671 - Uppermost fusuline bed. This is evidently the bed mapped by King as dividing the Leonard from the Word. By position it is Road Canyon but we only have fusulines to test this.
[[encircled]] 24 [[/encircled]]
March 28
Went out to Wolfcamp hills. Obtained permission to go on property and visited locality 727e for more blocks. The fritos algae beds are part of a bioherm which underlies the flat-bedded upper part of bed 4. Perhaps this should be placed in bed 3. Although we took 5 blocks we got the only pieces showing brachiopods.
March 29
Hill 5250 is N 70[[degree symbol]] W
Hill 5021 is N 60[[degree symbol]] E
Coscinophora blocks are on end of contour lobe above M29. This should be checked on older maps. Coscinophora definitely out of place because I saw a block plastered on the north side of the hill definitely out of place.
[[margin]] 737t = M2967 [[/margin]]
M29 - Biohermal humps or sand banks between the Pennsylvanian and the cgl. of the Lenox Hills. These masses contain numerous fossils. Fimbriaria was common at this place. The fauna suggested that from locality 715 in Dugout Mtn.
12145
[[encircled]] 25 [[/encircled]]
M29671 = 737u
Nose of hill having type section of Decie Ranch & just east of fault
I measured 49' from first or lowest cgl. ledge to lowest part of continuous cgl. Saw no biohermals above the continuous cgl. The slope distance was about 100'. These reefy bodies are mostly calcareinte and may represent large sand banks. We were not successful in collecting because the rock is very fresh. Ammonites are abundant but we were unsuccessful in getting any good ones.
715b - This is the long slope adjacent to the ravine separating the high hill with type Decie Ranch from the low faulted block. Here the biohermal beds or rather rounded masses are scattered over the surface. These also have many ammonites but they seem unattainable because of the freshness of the rock. Cgl. beds occur among them and cgl was seen in several levels at M29. The Cgl has chert pebbles and is brown like that of the Lenox Hills.
[[encircled]] 26 [[/encircled]]
March 30
706b is 0.7 mile east of middle of divide in Hess Canyon.
[[margin]] 737w [[/margin]]
It is Appel Ranch not Apple R. as we supposed and published.
The dolomite of the Skinner Ranch at 705a is about 75' above road at east end of hill facing Leonard Mtn. and descends nearly to road at 705a.
March 31 = 737v
M31 [[underlined]] Institella [[/underline]] in Hess lithology above a thick bed of small pebble cgl. Pebble cgl. over 5' thick. 25' - 30' of Hess lithology followed by yellow shale & bioherms.
Evidently the Cathedral Mtn. small pebble cgl. is not a single unit. At M31 it is at least 5' thick but upward it appears & disappears in a matrix of Hess Lithology. The great thickening of the Hess may be in part in the Cathedral Mtn.
[[encircled]] 27 [[/encircled]]
March 30
706b is about 0.8 miles east of the divide in Hess Canyon.
[[left margin]] 737w = [[/left margin]] M30 is another small lens about 0.1 miles west of 706b and about 100 yards N of the road.
M31 con't. It is a question whether the Cathedral Mtn. small pebble cgl. is actually a continuous bed. Another search for [[underline]] Amphipella [[/underline]] failed to turn up any more pieces.
[[encircled]] 28 [[/encircled]]
April 1 Taylor Ranch Member
N45[[degree symbol]] W of middle of high knob of wolfcamp hills N 20' W of Uddenites knob
[[image; diagram of geologic column]]
------|
3' |A
------|
4-5' |B
------|
10'+/-|C
------|
10-15'|D
------| |E
------|
[[/image]]
A = Sparsely crinoidal yellowish weathering ls. Enteletes
B - Yellowish gray ls. with orange chert. Large Omphalot rochus large clams, Peniculauris
C - cobbly limestone breaking into lumps and containing many fossils 10' +/-.
D - Covered - mostly shale? or soft crumbly ls.
E- Limestone cgl.
[[left margin]] 739i = [[/left margin]] A1' - Fusulines at bottom of thick dolomite capping hill 75' below top of hill with closed contour just W of hill 5821. This dolomite mass, I think, is the source of the Scacchinella found loose on the outcrop of Taylor Ranch.
5750 75
----
1675
[[circled]] 29 [[/circled]]
Be sure to check location A1 with my number for this place.
April 2
Searched for Waagenocaras at 707e but did not find a trace of one. Just under the capping ledge of the Road Canyon comes a limestone cgl. This appears on the lone narrow ridge from the point of the spur from Sullivan peak about half way from end of spur to crop of heavy beds. The cgl. looks much like that which underlies many of the bioherms. The heavy ledge seems to disappear in the hill on the west end of the Amphitheater on the west side of the spur. The [[underlined]] Choneticetes[[guess]] [[/underline]] beds seem to be the first fossils to appear commonly after a long series of unfossiliferous platy beds.
A2 - Choneticetes[[guess]] beds.
113
(HK)
Limestone-pebble conglomerate; light gray,
weathers gray, medium grained, thin
bedded, mottled with brownish gray,
silty [[underlined]] Linnarssonella girtyi [[/underlined]] .... 0.4 67.8
DRY CREEK MEMBER - 67.8 feet thick.
Covered; green fissile shale and brown, thin
bedded calcareous siltstone................................... 67.8 0
PILGRIM FORMATION
Limestone; the top of the massive Pilgrim limestone is the datum from which all footages are measured.
(GC)
tep 30 [[degree symbol]]
P.1
142 4
---
568' 48 6
---
288 [[crossed out]]
2 48 4
---
192 24
---
216'
139 4
---
516 5
[[sketch of geologic column with descriptions on right]]
covered backslap of hogback (is gray ls like in ledge 3 levels
[[line across page]]
forms crest of hogback
ammonites, sponges, bryozoa w chert blebs[[guess]] & [[?]]
blocky gray ls ledge 10 levels
[[line across page]]
Very platy siliceous shale, tan 12 levels
[[line across page]]
light gray ls. ledge 2 levels
[[line across page]]
blocky gray ls with spicules} in 1' beds, w 3 - 5 ft beds of tan siliceous shale between 10 levels
[[line across page]]
chert ledge, 1 ft ls at top -- 3 levels
[[line across page]]
thin tan platy chert -- 5 lev.
[[line across page]]
ls. hash, silicified brach frags -- 1 ft
[[line across page]]
thin platy, cherty sp[[crossed out 'iceless]] & [[?]] -- 2 levels & 2 ft
[[line across page]]
rubbly bioherm, not meas
112
(HK)
[[underline]] pebbles, Angulotreta tetonensis, A. vescula, 'Dicellomus' mosaicus, Lingulella [[/underline]] sp.............. 0.9 86.5
Covered; probably shale and shaly limestone......... 7.0 79.5
Limestone; light gray, fine grained, very glauconitic, and course grained coquinite with [[underline]] Angulotreta tetonensis, Billingsella perfecta, Taenicephalus gallupensis, T. shumardi, [[/underline]] Crinoid columnals............................................ 0.8 78.7
[[centered]] [[underline]] Parabolinoides [[/underline]] subzone
Limestone; gray, fine grained, slightly glauconitic, and coarse grained brachiopod coquinite with [[underline]] Angulotreta tetonensis, Billingsella perfecta, B. plicately, Ceratreta Thebes, Eoorthis remnicha [[/underline]] var. A., [[underline]] Orygmaspis firma, O. Illanoensis, Parabolinoides hebe, Simbaltea eryon,[[/underline]]
[[boxed in upper right margin]] Tep 30 [[degree symbol]] P2 [[/box]]
1 step = 4'5"
12/204 34 4
---
136 15
---
151
[[sketch of geologic column with text description to right]]
Covered base of back-slope
ledge at top of high hogback yellowish gray massive calcarenite -- 42 levels
25 levels to crest of hill
[[line across page]]
M25.67 [[circled]] 2 [[/circle]] 15/0 levels below [[arrow to line above]]
tan platy siliceous shale w/beds of gray fine gr. ls. & dolo (tan) & chert beds -- 40 levels
[[line across page]]
Massive gray ls. ledge calcarenite w/many siliceous fossil frags -- 4 levels [[circled]] 10 feet below top M25.67 [[circled]] 3 [[/circled]] [[/circled]]
[[line across page
[[arrow to left]] fusulinids near top M-25-67 [[circled]] 1 [[/circled]]
Partly cove. slope pf thin bedded gray ls [[insert]] fine grained [[/insert]] patches of tan dolo. [[crossed out]] (krosotella bed in middle of interval) [[/cross out]]
[[line across page]]
capped by gray ls w/chert reddish brown ledge, dolomite Liesotella at base -- 3 lev
[[line across page]]
Thin [[insert]] bedded [[/insert]] gray ls w thin interbeds of tan shale -- 20 levels
[[circled]] tan papery thin siliceous shale w/2" or 3" shingles [[?]] of grey ls Clyingen[[guess]] Ammonoid bed of p.1 [[/circled]] -- 11 levels 48'
[[circled]] 30 [[/circled]]
April 3
[[sketch of geologic column in left margin]] | | A
------------|
739h = A 3^1|
60'+- | B
Ammonites |
A3^2 = 737z |
------------| Lens |
- - - - - - | | C
------------|-
4' A3^3 | D
------------|
2 - 3' A3^4 | E
------------|
20'+- | F
------------|
30 - 40' | G
------------|
25' A5^5 | H 739e
------------| | I
------------| | J
------------| | K |
[[/sketch]]
A = Cretaceous
B = 45' of Slope, possibly 60' of sandy limestone with occasional fossils, richthofenids, Carhypinifina[[?]] yellow platy shale in lower 10' [[vertical note]] {737x [[/note]]
C - 65' of slope with yellow siliceous shale with 10' sandy ls. at top which is probably a local lens.
D - 3 - 4' fusulinid detrital limestone with Collumatus = 737y
E - 2 - 3' +- Blue cobbly ls with Road Canyon ammonites = 739d
F - 15' of slope possibly 20' of limestone, discontinuous, some fossiliferous.
G - [[cross out]]7' of slope in yellow siliceous shale
H - 20' of slope yellow siliceous shale and scattered ls beds with a thick 5' layer at the top. A3[[superscript]] 5 [[/superscript]] fusulinids = 739e
I - 30 - 35' of biohermal limestone with Coscinophora Cobbly basal beds.
J - covered
K - base of section - sandstone
61.9
[[left margin encircled]] 31 [[/left margin encircled]]
1 mile from road; 2 1/2 miles from old Payne R.
[[left margin]] 739f = [[/left margin]] A3[[superscript]] 6 [[/superscript]] - Low hill at base of Mtn. Dark thin beds of calcarenite in silicerous shale. Looks like Skinner Ranch
733j - took one block of Coscinophora Saw Scacchinella a little lower down from the [[underlined]] Coscinophora. [[/underlined]]
Location of bioherm beds at base of Road Canyon at A3.
On Dugout Mtn. N 75° E = S 75° W Hill 4861 N 15° E = S 15° W
Highest hill with
Word capped by Capitan N 5° W = S 5° E
[[left margin encircled]] 32 [[/left margin encircled]] Blocks
733j ------------- 4
M1867 ------------ 3 (small)
M18678 ----------- 4 =
732j ------------- 8
clinatis {728-z -- 4} Sent from {M24673 - 7} Marfa
727e ------------- 5
706e ------------- 1
M30 -------------- 1
721u ------------- 4
728p ------------- 8} Sent from
725g ------------ 2} Van Horn
A7 -------------- 2} ----- 53
Sent 14 bundles from Marfa
Sent 49 bundles from Marathon
Sent 14 bundles from Van Horn --- 77 bundles
728p = 700 Marfa 1500 lbs
725g, A7 = 450 Marathon 4770 lbs
Boxes = 200 Van Horn 1400 +/- ---- ----- 1350 7670
[[underline]] S. crassitect[[?]] [[/underline]]
[[sketch of geologic column showing rock formations]]
W.C. fus.
400'
------------| o o | o o o | Lenox Hills
------------|
--- -- --- -|
- --- -- -- |
------------| Neal Ranch
| | | | | | |
------------|
--- --- --- | --- --- ---|
------------|
| | | | | | | King's bed 2
------------|
--- --- -- -| --- --- ---| Uddenites Zone
------------|
| | | | |
------------| | | Gaptank
[[/sketch]]
A3[[superscript]] 3 [[/superscript]] } } 2
A1[[superscript]] 1 [[/superscript]] }
A3[[superscript]] 1 [[/superscript }
M1767 } 4
M30671 }
A3675
A3676