Tonto National Forest Devonian Project
Fossil of primitive fish Asterolepis in foreground, with life reconstruction behind.
| Museum Researchers: | Principal Investigator Adjunct Curator Dr. Heidemarie Johnson |
| Location: | Near Payson |
| Age: | Middle to Upper Devonian, 380 million years before present |
| Geological Unit: | Martin Limestone |
| Discoveries Include: | The ancient fishes, Asterolepis, Bothriolepis, Arthrodira. |
| Comments: | The beds containing the fish, Asterolepis apparently represent a mass death in a drying pond or ox bow lake, not far from the ancient ocean that covered much of Arizona. |
Publications from Tonto National Forest Devonian Project
| 2001 | In Search of Clues: Solving the Mystery of a 375 million year old Mass-Kill. Heidemarie G. Johnson. Mesa Southwest Museum Bulletin 8:1. |
| 2000 | A New Antiarch (Class Placodermi) from Arizona. Heidemarie G. Johnson (abstract). Mesa Southwest Museum Bulletin 7: 1. |
| 1995 | Devonian Fossil Fish from Central Arizona. Heidemarie G. Johnson. Fossils of Arizona Symposium Proceedings Volume 3:1-6. |