Lyons sandstone at Lyons. Boulder County, Colorado. 1922.
Dates
Date Taken
1922
Summary
Lyons sandstone at Lyons; the face shows sharp boundaries between groups of cross- bedded layers and the truncation of the older layers before the younger ones were laid down, thus forming an angular unconformity in miniature. Boulder County, Colorado. 1922. Plate 17-C in U.S. Geological Survey. Professional paper 149. 1927.
Summary
Lyons sandstone at Lyons; the face shows sharp boundaries between groups of cross- bedded layers and the truncation of the older layers before the younger ones were laid down, thus forming an angular unconformity in miniature. Boulder County, Colorado. 1922. Plate 17-C in U.S. Geological Survey. Professional paper 149. 1927.
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