Lyons sandstone at Lyons. Boulder County, Colorado. 1922.
Dates
Date Taken
1922
Summary
Lyons sandstone at Lyons; the cross-bedding extends from the top nearly to the bottom of the formation, and the trees stand on the slightly eroded upper surface, or bedding plane. Boulder County, Colorado. 1922. Plate 17-A in U.S. Geological Survey. Professional paper 149. 1927.
Summary
Lyons sandstone at Lyons; the cross-bedding extends from the top nearly to the bottom of the formation, and the trees stand on the slightly eroded upper surface, or bedding plane. Boulder County, Colorado. 1922. Plate 17-A in U.S. Geological Survey. Professional paper 149. 1927.
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