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Transcription
32.
109
E. of D cut.
5 ft 3 in. Corniferous. 1mra 2½ feet
very crinoidal.
5 ft soft Ozgood clay,
Clintm massive looking, with
calcite in upper 2 feet.
Top chert layer is found 2 feet
below top of Clintm.
The massive appearance probably
due to absence of weathering since
the exposure in the cut is quite fresh.
A E
West of Chicago.
Impossible to determine just how
much Clinton was preserved. The
following observations are the result
of careful measurements.
Black Shale
1 foot brown rock Corniferous
6 in. crinoidal rock
15 feet Clintm. Lower 5 feet = massive
8 in. thin bedded.
2 ft with Tetradinn.
4 ft. Madison bed but here it is weathered
so as to be very soft.
6 ft. weathering softer than bed above.
8 ft. hard at top, softer below.
2 ft. Coral bed. Columnaria halli;
B F 33.
Chicago. West of distillery in N.W.
part of Turn.
Black shale.
2½ft Corniferous 6 in. brown rock
{2 ft. crinoidal
15 ft Clintm
Thin bedded
110
West of Loretto.
Black slate.
cornif 6 in. brown rock with cross larrons.
orus 3 in. not exposed.
17½ ft Clintm.
Soft clayey rock.
105.
North of Loretto.
Black slate.
Corniferous. {2ft 3 in. of brown rock
? with volute burrows at top
9 in. white the crinoidal b.
weathered away in places.
3 ft 3 in. regular bedded, contain
ing calcite + 2 rare chert.
7 feet. Massive Clintm. with calcite,
6 feet 9 in. soft clayey at top
Madism bed, top.