Bostwick Conglomerate Outcropping

In the 10-mile stretch of US-77 north of Ardmore are located this marker and others noting the unique geological features of the area, including the Woodford Shale and Chert Outcropping, Chimney Hill Limestone Outcropping, Viola Limestone Outcropping, Tulip Creek and Third Bromide Sandstone Outcropping, Basil McLish Sandstone Outcropping, and the Arbuckle-West Spring Creek Lime Outcropping. **