[[left margin, circled]] 
41 [[/left margin]] 
Cut on US 54, 1 .3 miles south of Holtz Summit 
Sections on two sides of road are different, the one on the E side is 
best. 
[[left margin, image of layers]] 
? 
5' H 
2 1/2 G 
2 1/2' F 
1 E 
13' D 
28" C 
3' B 
4-5' A 
[[/left margin]] 
A - Jeff City - rises to 1 0'+ to S. 
B - lenticular mass of oolite not present on west side road. 
C - Platy thin bedded dolomite 28" with green shale at base and top. 
A,B.C. probably belong to the Jeff City 
Devonian appears in one great massive irregular bed 13' mostly of Is 
breccia 
E - Thin slabby Is. T light gray breaks in plates. Very light gray 
F - light gray Is. in beds of 6"-9" 2 1/2' 
G - 2 1/2' massive ledge of light dove Is weathering white 
H - massive Is with many small dark stromatopora 5' 
6689a Cut 1 mile on US 54 S of Holtz Summit 
Smithsonian Institution Transcription Center, 
G. Arthur Cooper - Field notes, 1 966 
Transcribed and Reviewed by Digital Volunteers 
Extracted Nov-02-2015 11:09:05 
Smithsonian Institution Archives 
