Astralopteris

Astralopteris

Fossil evidence

Fossil ferns are fairly common in the Dakota Formation. Often they are preserved in coal seams by layers of volcanic ash that fell from the sky.

Monograph source: Rushforth, Samuel R. 1971. A flora from the Dakota Sandstone Formation (Cenomanian) near Westwater, Grand County, Utah. Biological Series. Vol. 14(3).

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