Fotos / Sons
What
Delphineis angustataObservador
kerrylhowardDescrição
Fossil sample from Miocene Calvert Formation (http://www.mgs.md.gov/geology/fossils/calvert_cliffs_fs.html)
Diatomaceous earth/sandy clay strata (no marl present--no HCl reaction at sample location).
Fotos / Sons
What
Urosolenia eriensisObservador
kerrylhowardDescrição
Plankton tow from dock at boat ramp at Orleans Beach, Spirit Lake, IA
Fotos / Sons
What
Género CyclotellaObservador
kerrylhowardDescrição
Marginal costae: 5 in 5um
1 process on valve face
