Short description: Doyle (lower Towanda limestone and uppermost Holmesville shale) Shale exposed in road cuts on both sides of U.S. Highway 77, with base of Towanda limestone at 365 m (1190 ft); one digital photo on the northeast side of U.S. Highway 77; approximately 300 ft east of center of NW1/4, Sec. 4, T.11S., R.5E., Geary Co., Kansas.
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