Marshall County Sec 31, T. 3 S, R. 7 E.

Wreford formation, east side Big Blue Valley, 1 1/4 miles south of Schroyer, Kansas; badly slumped Legal location estimated Measured by Condra and Upp, 1931, page 35 Remarks: Section no. 11

Unit No. Description Thickness ft.   Schroyer limestone   9 Limestone, poorly exposed, cherty 5 8 Limestone, badly weathered, irregular 3.5 7 Limestone, dark gray, massive, uneven at top and bottom, grading into shaly lime 5-6 6 Limestone, shaly, slabby 3.5 5 Limestone, weathers slabby to shaly with Aviculopecten, etc. 3 4 Limestone, massive, irregular 1.66   Havensville shale   3 Shale, slabby 3 2 Shale, largely olive and gray and with some fossils 5 1 Four Mile limestone, cherty, massive, with thin shale partings 7.5-8