A photo of Ernst Tinaja.
By Geology and Ecology of National Parks
June 1990 (approx.)
Detailed Description
View looking downstream into Ernst Tinaja. The Ernst Member of the Boquillas Formation consists of thin-bedded shales that contain inoceramids (an extinct group of clams). These sediments were deposited in the Western Interior Seaway during the Cretaceous Period (Scheubel and Mruk, 1994; Cooper and others (2007).
Sources/Usage
A photo of Ernst Tinaja.