Glacier National Park, Montana. Collenia frequens in the Collenia frequens zone in Altyn Limestone near Appekunny Falls. 1953.
Dates
Date Taken
1953
Summary
Glacier National Park, Montana. Collenia frequens in the Collenia frequens zone in Altyn Limestone near Appekunny Falls. Joint surface shows longitudinal section of cylindroids with strongly convex laminae. 1953. Plate 20, Figure 4, U.S. Geological Survey Professional paper 294-D; Figure 123, U.S. Geological Survey Professional paper 294-K.
Summary
Glacier National Park, Montana. Collenia frequens in the Collenia frequens zone in Altyn Limestone near Appekunny Falls. Joint surface shows longitudinal section of cylindroids with strongly convex laminae. 1953. Plate 20, Figure 4, U.S. Geological Survey Professional paper 294-D; Figure 123, U.S. Geological Survey Professional paper 294-K.
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