UGA Stratigraphy Lab

The data is in the strata



Modiolus isonemus (Meek, 1877)
Has fine regularly spaced concentric ribs, less arched
Occurrence: Twin Creek, Arapien
Reference: Imlay, 1964

Modiolus subimbricatus (Meek, 1873)
Has coarser imbricate ribs, more highly arched
Occurrence: Carmel
Reference: Imlay, 1964

Specimen Photo

Modiolus subimbricatus
Photograph from Imlay, 1964