Stratigraphy of Kansas Permian— Beede and Sellards. 89 
Fort Riley limestone show a tendency to pinch out, or to 
be lenticular as is shown in the Marysville and Oketa quar- 
ries but it has no effect on the thickness of the stratum as 
a whole. 
There is an excellent exposure of the lower Permian 
rocks, ranging from the upper part of the Wreford well 
into the Fort Riley limestone, on the west side of the Big 
Blue river three miles south of Marysville where the bot- 
tom road crosses a bridge over a little creek. The section 
begins at the river level and passes up the creek beneath 
the bridge to the top of the high, bare-faced bluff above 
the bridge. At this point the Wreford limestone passes 
beneath the Big Blue river, causing a slight fall. 
SECTION AT BRIDGE ACROSS CREEK THREE MILES SOUTH 
OP MARYSVILLE ON THE WEST SIDE OF THE 
BIG BLUE RP7ER. 
28. Limestone 5+ ft. inches 
27. Covered 10 " " 
26. Limestone, shaly 3 " " 
25. Limestone with fossils and a little chert 2 " 
24. Shales, yellow, with fossils 1 6 
23. Limestone with 3 to 4 layers of concretionary 
chert 3 " 4 " 
22. Shale, calcareous, or marl 9 
21. Limestone with thin chert layer below and 4 
inch layer in upper part 2 " " 
20. Limestone with 7 layers of concretionary chert 5 "6 " 
19. Limestone with 4 layers of concretionary chert 4 " 
18. Shales, fossiliferous, = layer below flint at 
Marysville .0 " 6 
17. Limestone, argillaceous' 3 " " 
16. Shales, red and green with sandstone layer.. 14 " 
15. Sandstone, soft red 1 3 " 
14. Shales, clayey, blue, olive and green 19 " " 
13. Limestone, blue 1 " " 
12. Shales, blue clayey 3 
11. Talus, by barometer 25 " 
10. Shales, green, showing in creek bank 1 6 
9. Covered, creek bed 3 
8. Limestone, gray clayey 2 " " 
7. Limestone, very compact with smooth frac- 
ture, solid geodes 1 
