BEEDE: RECONNAISSANCE IN THE BLUE VALLEY. 201 



Oketo Section Florence FUnt and Limestone, ne((r the depot. 



stratum. Total, 



ft. in. ft. in. 



7. Drab, clayey, blocky limestone 3 — 6 37 — 6 



6. Bluish, shaly limestone 7—0 34— 



5. Third layer of limestone, containing flint 4 — 27 — 



4, Limestone with great quantities of dark flint 6 — 6 23 — 



3. Limestone with four prominent layei-s of dark flint 3 — 8 16 — 6 



2. Blue, argillaceous, shaly limestone 2 — 10 12 — 10 



1. Red and variously colored shales or marls 10 — 10 — 



Add to this the rocks exposed east of town, and we have the 

 following section : Oolite, two feet six inches : shaly rock and 

 covered slope, ten feet, with a two-foot " foundation" rock. 

 This makes the complete section of the Florence limestone and 

 flint as it appears in the north Kansas-Nebraska region. The 

 oolite seems to be confined to the northern part of the region. 

 West and south of Marysville, near the head of Walnut creek, 

 north of Waterville, the heavier limestone forming the bluffs 

 there shows some oolitic structure, which is the farthest south 

 that it was observed. At Marysville, the u])per very fossilifer- 

 ous rock, in the pasture north of the road running east, shows 

 brownish oolite in places. 



A fairly good exposure of the Florence flint and limestone is 

 shown in the hill a mile and a half north and a little east of 

 the Waterville bridge, in the road running u]) the hill. There 

 are more than thirty-five feet of them exposed here ; the lower 

 twelve feet are flints and limestone, above which are shaly 

 limestones to the main ledge, of which three feet are shown. 

 Above this are red, green and olive shales, with a few thin 

 shaly limestones for about thirty-five feet, over which lies an 

 ill-exposed limestone. 



FLORENCE FLINT WEST OF GARRISON. 



About a mile west of Garrison is a very high bluff facing the 

 east, on the south side of the railroad. There is not a contin- 

 uous section at this place ; but, by beginning at the northern 

 part of the exposure in the creek and working to the base of the 

 flint, and then going south where the bluff becomes steeper, and 

 continuing from the base of the flint to the top of the bluff, the 

 following section may be seen : 



Garrison Section. f^';*'^^; ^^ota^. 



12. Thin layer or two of limestone 2+ 



11. Massive hard, gray limestone, weathering very rough 4 — 8 88 — 8 



10. bellow shale and covered slope 15—0 84 — 



