Washington County Sec. 25, T. 1 S., R. 4 E

The Marion formation in the bluffs northeast of Spence Siding on the U.P.R.R. between Hollenberg and Hanover, Kansas. Measured by Condra and Upp (P. 65) Date 1931 Remarks: Section No. 25.

Unit No. Description Thickness ft.   Pearl sh   15 Hollenberg ls, bedded, weaths yellowish, forms large flat blocks, fossiliferous 3.5 14 Sh, bluish-gray, red and gray. The top of this carries many calc concretions, and there is a poorly defined mudstone layer about 10' above base 39   Herington ls   13 Ls, cut by a few thin sh streaks, highly pitted, geodal, badly weath 5.66 12 Ls, buff, massive, geodal, pitting very characteristic 1.16 11 Ls, a seam, weaths slabby .08 10 Ls, buff, massive, forms re-entrant, chalky with brn specks scattered throughout 1 9 Sh, olive gm to mustard yel, indurated, limy, fossiliferous .08 8 Mudstone, gray, fossiliferous 1 7 Paddock sh, olive gm to gray, indurated, massive, blocky 12   Krider ls   6 Ls, lt gray to buff, weaths bedded, beds 4"-6" thick, dense 1.16 5 Sh, gray to buff, calc, nearly a mudstone, grades upward into [unit 6] 2.5 4 Ls, gray to buff, contains some specimens of Orbiculoidea .75 3 Ls, dense .33-.5 2 Sh, gray to bluish-gray, indurated, blocky, grades upward into mudstone-is 2.33 1 Sh, chocolate-maroon, massive, blocky 1

In the bluffs one-half mile northeast of Spence Siding an the U.P.R.R. Measured by M. K. Elias, Date 1932 Remarks: V - 24. The thickness of these members are given as measured by Condra and Upp, 1931, p. 65.

Unit No. Description Thickness ft.   Hollenberg ls member   10 Ls, yel, bedded, fossiliferous 3.5   Pearl sb formation   9 Sh, bluish gray and red 39   Nolans ls formation     Herrington ls member   8 La, lt-buff, massive 8 7 Ls, It-buff, with num fossils: Myalina, aviculoides, Myalina permiana, Aviculopecten, Pseudomonotis, Pleurophorus .5   Paddock sh member   6 Sh, grnish to gray 13   Krider ls member   5 Mudstone, lt.-gray, with Myalina and Pinna 1 4 Sh, gray, some pelecypods near top 3.5 3 Ls, gray, breaking in large slabs (with Orbiculoidea, after Condra and Upp, 1931, p. 66) 1   Odell sh formation   2 Sh, gray 2.6 1 Sh, red 5