Andrews, G.W. (1976) Miocene marine diatoms from the Choptank Formation, Calvert County, Maryland Geological Survey Professional Paper 910, 26 pp.

The source for diatom identification and ecology

Cite as: Spaulding et al. 2021. Diatoms.org: supporting taxonomists, connecting communities. Diatom Research 36(4): 291-304. https://doi.org/10.1080/0269249X.2021.2006790