Beecher's Trilobite Bed
 Triarthrus ventral |
 Triarthrus dorsal |
 Triarthrus x-ray |
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Triarthrus ventral |
Triarthrus dorsal |
Triarthrus x-ray |
In a small quarry near Rome, New York is one of the world's finest examples of trilobite preservation. Beecher's Trilobite Bed, a three-centimeter-thick flysch deposit in the Ordovician Frankfort Shale has yielded numerous trilobites with the ventral anatomy and musculature intact. Specimens of Cryptolithus bellulus (Ulrich), Cornuproetus beecheri (Ruedeman), Primaspis crosotus (Locke) and Triarthrus eatoni (Hall) occur in many museums and collections. According to Cisne (1973) the fine preservation of the trilobites in iron pyrite is the product of: (1) rapid deposition of the animals by a turbidity current, (2) presence of abundant organic material, and (3) immediate compaction of sediments. Shown above are several images of Triarthrus eatoni from the Yale collections. Many of the images have been provided by Thomas E. Whitely.
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Triarthrus eatoni (Hall), YPM 219 |
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Triarthrus eatoni (Hall), YPM 220 |
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Triarthrus eatoni (Hall), YPM 230 |
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Triarthrus eatoni (Hall), YPM 247 |
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Triarthrus eatoni (Hall), YPM 201 |
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Triarthrus eatoni (Hall), YPM 203 |
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Triarthrus eatoni (Hall), YPM 204 |
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Triarthrus eatoni (Hall), YPM 206 |
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Triarthrus eatoni (Hall), YPM 209 |
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Triarthrus eatoni (Hall), YPM 210 |
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Triarthrus eatoni (Hall), YPM 228 |
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Triarthrus eatoni (Hall), YPM 28253 |
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Triarthrus eatoni (Hall), YPM 228 |
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