OF THE UPPER MISSOURI, 45 
Kansas, extending back from four to six miles, and as much as eighteen or twenty miles 
along the river. Bounding this on the north the country rises by a gentle grassy slope 
to an elevation of from sixty to about one hundred feet, furnishing the most beautiful sites 
for dwelling-houses. 
For a considerable distance above the locality where the exposure near the old Baptist 
Mission was examined, the hills, especially near the river on the south side, appear to be 
mainly composed of rather heavy deposits of laminated clays and shales, with soft sand- 
stones and occasional thin beds of limestone, containing the usual fossils of the Upper Car- 
boniferous series. At the crossing of Mission creek, at an elevation of perhaps not more 
than twenty-five or thirty feet above the Kansas, exposures were observed consisting first 
above of five feet of light gray laminated clay, resting upon two or three feet of soft yellow 
sandstone, which passes down into laminated arenaceous clays, of which some eight or ten 
feet were exposed above the creek. 
Some fifteen or sixteen miles west of the point where the road crosses Mission creek, at 
a locality six or seven miles south of the Kansas, there is a high elevation, known by the 
name of Buffalo mound, rising as much as four hundred and fifty or sixty feet above the 
river, At one place a large creek, called on the maps Upper Mill creek, sweeps close along 
the northern base of this elevation, and has carried away the loose debris so as to leave the 
lower strata well exposed ‘The section here beginning at the summit of this hill is,— 
Feet. 
1. A slope of about 160 feet, along the lower forty feet of which we found loose specimens of Spirifer 
cameratus, S. planoconvexa, Retzia Mormonti, Productus splendens ?, Chenetes Verneuiliana, C. mucro- 
nata, and Fusulina cylindrica, var. ventricosa, with fragments of Cheetetes, Crinoids, &c., of undeter- 
mined species, 
2. Bluish gray limestone in two eis: oe upper of ich contains iain of Crinoids, Petes Cal. 
hounianus, &e., while Myalina subquadrata, Orthisina Missouriensis, Allorisma, Pinna, Monotis, &c., 
of undetermined species, occur in the lower, . ‘ s ‘ ; é ‘ . : i eer | 
3. Slope, with no exposures of rock, . . 96 
4. Rather hard mottled brown and Hight ¢3 gray sch Sachi with a few Crinoid sehen may be 
thicker, but only showing a thickness of . ons : é : ‘ : ' 3 
5. Brown, whitish, and green clays, with rugged white ulaaivtil concretions, . ‘ ‘ ‘ ‘ eae 
6. Fine argillaceous sandstone, with streaks of yellow and brown colors, . j : : é : e 28 
7. Ash-colored clay, . 10 
8. Clays of red or brownish ae above; ee oe green aes ‘ ; : : ; j ‘ , Be 
9. Deep brown clay, with rugged concretions of same color, 3 
10. Hard light bluish limestone, with some rather large columns of Crinoidl, Ponce Pakouibbias &o.,.° 23 
11. Brown, ash-colored, and blue laminated clays, which are more or less arenaceous, with near the middle 
some 5 or 6 inches black shale, : 4G 
12. Gray and purple argillaceous limestone, with Pinna, ‘Pieaaceli and a tes Fusulina, ‘ 1} 
» . + 
13. Green laminated clay, 
