Ordovician Age

Cyclonemafrom the Ordovician of central Kentucky
Cyclonema from the Ordovician of central Kentucky
Cyclonema sp.
Cyclonema sp.
Probably Fusispira/Subulities genus. Looks like Fusispira nobilis. The smaller with the fuller whorls looks like Hormotoma sp. [Info. from Peter Lickley.]
Probably Fusispira/Subulities genus. Looks like Fusispira nobilis. The smaller with the fuller whorls looks like Hormotoma sp. [Info. from Peter Lickley.]
Maclurites, Ordovician age
Maclurites, Ordovician age
Trepospira illinoiensis, Pennsylvanian age
Trepispira medalis from the Lexington Limestone (identified by Alan Goldstein).

 

Devonian Age

Turbonopsis shumardi, recrystallized internal mold (steinkern), Devonian of Kentucky
Palaeozyglopleura from Devonian age (identified by A. Goldstein)
Palaeozyglopleura from Devonian age (identified by A. Goldstein)
Palaeozyglopleura from Devonian age (identified by A. Goldstein)
Palaeozyglopleura from Devonian age (identified by A. Goldstein)
Palaeozyglopleura from Devonian age (identified by A. Goldstein)
Palaeozyglopleura from Devonian age (identified by A. Goldstein) in cross section, recrystallized
Turbonopsis shumardi, internal mold, Devonian age
Turbonopsis shumardi, internal mold, Devonian age
Turbonopsis shumardi, Devonian age
Turbonopsis shumardi, Devonian age
Platyceras sp., recrystallized internal mold, Devonian age
Platyceras sp., recrystallized internal mold, Devonian age
Platyceras dumosum, the spines from a spiney species, Devonian age
Platyceras dumosum, the spines from a spiney species, Devonian age

Pennsylvanian Age

Worthenia tabulata, Pennsylvanian age.
Worthenia tabulata from the Pennsylvanian of eastern Kentucky
Trepospira illinoiensis, Pennsylvanian age
Trepospira illinoiensis, aragonitic shell material preserved, Pennsylvanian age
Strobeus sp., Pennsylvanian age
Strobeus sp., preserved by pyrite (iron sulfide), Pennsylvanian age
Worthenia tabulata
Worthenia tabulata
high-spired specimens
high-spired specimens
Bellerophon (Pharkidonatus) cf. B. percarinatus, color pattern preserved around aperture (opening)
Bellerophon (Pharkidonatus) cf. B. percarinatus, color pattern preserved around aperture (opening)

Content and graphics by Stephen Greb, Kentucky Geological Survey

 

Last Modified on 2021-12-21
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