The Geology of D.A.R. State Park, Mt. Philo State Forest Park, Sand Bar State Park

by Harry W. Dodge

4-B. Dinorthis pectinella, Brachiopod, Middle Ordovician (Trenton Stage). Exterior view of the pedicle valve.

5. Reuschella edsoni, Brachiopod, Middle Ordovician. Exterior view of the pedicle valve.

6. Lingula, Brachiopod, Ordovician to Recent.

7-A. Prasopora, Bryozoan, Ordovician. Top view. (X0.5)

7-B. Prasopora, Bryozoan, Ordovician. Side view. (X0.5)

7-C. Prasopora, Bryozoan, Ordovician. Vertical thin section showing the nature and growth of part of a bryozoan colony. (X18)

8. Bryozoan, “twig-like” type, Ordovician to Devonian.

9. Sowerbyella, Brachiopod, Middle and Upper Ordovician. Exterior view of brachial valve. (X2)

10. Rafinesquina, Brachiopod, Middle and Upper Ordovician. Exterior view of the pedicle valve.

11. Platystrophia trentonensis, Brachiopod, Middle Ordovician (Trenton Stage). Anterior or front view.