Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Section
493-B
Siltstone, ptmg
silty sh. Frag.
fossils-oysters +
Moccureeds.
36"
Bentonite
5"
Gray shale and
silty shale
51"
11
Bentonite
- 1"
Gr.sh.+silty sh.,for
2 thin bds. silky
siltstone.
31"
Platy siltstone, fissure,
pt.fragm. clasts
6"
Gray to brownish
(weathered), silty in
upper part wi.
thin layers shale
siltstone
47"
9
Bentonite
5'aw
Dark gray
shale
with
brownish
streaks
22
76
354
rusty
8
7
Dk,qr. sh.wi.
brownish streaks,
basal 1/2 dense
argillaceous
38
Bentonite
19
rusty
1
Dk. gray to 58"
rusty
black shale
34
4
Bentonite 4"
Dk. gray to black
shale
68
18
rusty
rusty
3
2
Ammonite b.c.conc.zone
Bentonite
22
sawee bed at top
of 493-A -walked in
field.
493-B
Section
493-A
ls.conc layer
with ammonites
Bentonite 12"+
Dk.gr.sh. 18"
Oyster bed .5
Dk gr sh 45
20
25
11
10
9
8
Bentonite 1"
Shale 6"
Bentonite 2"
Dark gray shale 47
Bentonite 1/2"
Dk.gr.sh. 10"
Bentonite 1"
Dk.qr.sh. 11"
rusty
7
Dk. qr. shale 47
6
Bentonite 1"
Dk. qr. shale 33"
5
Bentonite 3"
Dk.gr.sh 20"
Bentonite 3"
Dk.qr.sh.
Bentonite streak
26
47
21
2
1
Bentonite 3"
Gray sh. 20"
Base of exposure
Ammonite zone A.
493-4
Concretizing beds with ammonites
(Not confined to bentonite.)