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Beecher's Trilobite Bed is a Konservat-Lagerstätte of Late Ordovician (Caradoc) age located within the Frankfort Shale in Cleveland's Glen, Oneida County, New York, USA. [1] [2] Only 3–4 centimeters thick, Beecher's Trilobite Bed has yielded numerous exceptionally preserved trilobites with the ventral anatomy and soft tissue intact, the soft tissue preserved by pyrite replacement.
A Triarthrus eatoni with preserved appendages. From upper New York, United States. The preservational regime of Beecher's Trilobite Bed (Upper Ordovician) and other similar localities [1] involves the replacement of soft tissues with pyrite, producing a three-dimensional fossil replicating the anatomy of the original organism. [2]
A fossil specimen of the trilobite Triarthrus eatoni from the Beechers Beds, showing the sites characteristic pyritic preservation style.. Located within Oneida County, New York, and the larger Frankfort Shale, the Beechers Trilobite Bed is a Konservat-Lagerstätten fossil site that dates to the Katian stage of the upper Ordovician. [1]
Charles Emerson Beecher (October 9, 1856 – February 14, 1904) was an American paleontologist most famous for the thorough excavation, preparation and study of trilobite ventral anatomy from specimens collected at Beecher's Trilobite Bed. Beecher was rapidly promoted at Yale Peabody Museum, eventually rising to head that institution.
The group is host to pyritized trilobites and other fossils in New York including the Beecher's Trilobite Bed. [1]
"As well as having their beautiful and striking golden colour, these fossils are spectacularly preserved."
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Triarthrus is an average size trilobite (up to about 5 centimetres or 2.0 inches) and its moderately convex body is about twice as long as wide (excluding spines). Like in all Olenidae, the headshield (or cephalon ) of Triarthrus has opisthoparian sutures , and the right and left free cheeks that they define are yoked.