Hash fossils are groups of fossils in the same rock. The term hash fossil describes the fossil formed when all the organic material in an environment falls to the ocean floor and fossilizes, hence the name "hash". Common fossils found in hash fossils include corals, crinoids, bryozoans, and brachiopods. Hash fossils are very common, and are most easily found in limestone.
References
- New York state museum
- A Complete Guide to Michigan Fossil Hunting: Joseph Kchodl
- Fossil Hunting in the Great Lakes State: Jack Stack
- A guide to Michigan Fossil Hunting by Michael Stack
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