THE MISSOURI AND PLATTE RIVERS, ETC. 
APPENDIX E. 
~ Gronogicar NOTE ON SECTION IN RAVINE OF L’HAv Qui Court RIVER, BY 
AKE. 
LA i saa Notrs, &¢., oN Nepraska, sy Dr. 
wey: Havpey 
_ Observations on the Geological specimens collected by Lieutenant G. K. 
arren from the bluffs of a ravine in the Mauvaises Terres, By 
William P. Bl ake. 
| Masatnaze, D. C., March 15, 1956. 
rva judge will present ery nearly the nature of the strata 
for a wide area in that region. Until this time we have been without 
uite of specimens from these strat, and without any very definite 
knowledge of their mineral characters. 
m these specimens and your explanations 1 I have constructed the 
s iittiexed sectional view of the face of the bluff: 
g—Loose sand; sand hills 50 to 00 feet high. 
. oe 
J--3 to 5 feet hard caleareous sandstone. z 
--—------ e—15 feet of sand. 
* 
d—3 inches of clay and shells. 
-.-- - €—15 feet of sand. 
# 
- b—10 feet thin strata of clay, interstratified with sand. 
oe 
- a—15 feet friable sandstone, (caleareous.) 
ee eae 
ahickenene-t thus des satel is about sixty feet, an consists, 
seen, of ~_ colored friable sa ndstones ; ‘sand looely CO 
