Chert pebble with molluscan borings. Santa Barbara County, California. 1931.
Dates
Date Taken
1931
Summary
Chert pebble with molluscan borings; showing compaction into the adjacent laminated rock (now chert). Santa Barbara County, California. 1931. Plate 17-D, in U.S.Geological Survey Professional paper 212. 1943.
Summary
Chert pebble with molluscan borings; showing compaction into the adjacent laminated rock (now chert). Santa Barbara County, California. 1931. Plate 17-D, in U.S.Geological Survey Professional paper 212. 1943.
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