226 On the Lower Cretaceous beds of Kansas and Nebras 
making time. At another locality about eight or ten miles up 
the Big Sioux river, which comes in from the northwest, one of 
us (Dr. H.) saw No. 1, containing its characteristic fossil leaves, — 
directly beneath No. 2, "of the Nebraska section. The exposure 
presented the following beds in the descending order: 
1, 20 feet exposed of light gray ee ge No. 8, Nebraska See. 
marl, containing Inoceramus problem : 
2, 45 feet dark laminated clay with renner No. 2, Nabraska Set 
concretions containing fish scales 
3. 15 feet exposed above the edge of the water, 
consisting of yellowish friable peepee ith ie 
a thin bed of impure lignite above, and some }No. 1, Nebraska Se 
layers of various im ge clay below, “scuitainteag . 
dicotyledonous lea 
overlaid by No. 2, of the Nebraska section, containing ae 
acteristic species of Ammonites ; and directly over the latter, he 
saw No. 3, containing Jnoceramus problematicus.* A this lool 
ity he also found in No. 1 some of the same — leaves that 
characterize it at the other places alread mentioned. 
On ascending the Missouri, above the last named locality 
formations No. 2, 8, 4 and 5 are seen to sink at the same d 
uniform rate of dip, i in regular succession, beneath a evel 
the river; so that on reaching Heart river, we find the 
No. 5 5 nearly down on a ag with the water's edge: and a shor 
arr 
by the Great Terti 
below. overlaps it ray 
_ From the foregoing statement, ve think it + il be ei 
undetstood, that formation No. 1 of the Nebraska section 2?” 
& position beneath the “otbiat cretaceous deposits of that region} 
while the ete oe in it of the remains of highly: “get? 
angiosperm dicotyledonous plants proves that it cannot 0° 
ero ee may - argued, — that it pre 
peti ise eere cs. Tertiary, or at any : he at 
tals uty may have been obtained tags hg yi _ ‘ao 
ch we have confounded with t 
* It is of course course unnecessary for us to inform logical readers that ar se te 
ian a - sik ist Game anai eae erty Be 
gener became exact atthe dawn of to Tertary pooh “3 
& 
