Historical Marker Program

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Bostwick Conglomerate Outcropping

Carter County
Location: one mile north of US-77 and OK-142 in Ardmore
Topics: Natural Resources

On the ten-mile stretch of US-77 north of Ardmore are markers noting the unique geological features of the area. The markers include 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.


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To find out more about the Oklahoma Historical Society Historical Marker Program or how to submit an application, please visit the Historical Marker Program page.

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Contact Us

If you have questions, please contact:
Matthew Pearce
Oklahoma Historical Society
800 Nazih Zuhdi Drive
Oklahoma City, OK 73105
405-522-8659
[email protected]