A black and white photo of three slabs of ripple marks. A ruler is on top of the slabs for measurement.
black and white photograph
Digitized by Forsyth Digital Collections
Copyright University Archives, Fort Hays State University
Sternberg, George Fryer 1883-1969, "089-02: Slabs of Ripple Marks" (2021). George Sternberg Album #2 - Early Canadian Views. 358.