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The Walcott–Rust quarry, in Herkimer County, New York, is an excellent example of an obrution (rapid burial or "smothered") Lagerstätte. Unique preservation of trilobite appendages resulted from early consolidation (cementation) of the surrounding rock, followed by spar filling of the interior cavity within the appendages .
Basic anatomy of a trilobite. Waukeshaaspis was a modest sized trilobite, with an average length of around 60 mm (6 cm) long, with sizes going down to at least 9 mm (0.9 cm). [3] The cephalon of the trilobite was semi-circular, and possessed very long genal spines that extended down to the beginning of the pygidium. [3]
Due to the fragmentary nature of most trilobites found in the formation, it may represent a trilobite molting ground or just an area where ocean currents brought dead trilobite exoskeletons. Latham shale is the primary rock formation in the southern Marble Mountains of the Mojave Desert where it is found in deposits 15–24 metres (49–79 ft ...
A trilobite belonging to the family Alokistocaridae. Chancia was a particle feeder. Its major characteristics are a normal glabella but an enlarged cephalon due to a pre-glabellar field in front of the glabella, as well as developed eye ridges, medium-sized genal spines, and an extremely small pygidium.
The shale quarry, informally known as Penn Dixie, stopped mining in the 1960s. The large amounts of trilobites were discovered in the 1970s by Dan Cooper. [38] As a well-known rock collector, he incited scientific and public interest in the location. [39]
The Mount Stephen trilobite beds (UNSM locality 14s) [1] are a series of fossil strata on Mount Stephen, British Columbia that contain exceptionally preserved fossil material. Part of the same stratigraphic unit as the Burgess Shale deposit, many non-mineralized parts (such as anomalocarid claws, sponges, and trilobite legs) are preserved; in ...
High quality fossil specimens (Lagerstätte) were obtained from the Noah Getz Quarry, one mile north of Rohrerstown, Pennsylvania, but the quarry location is overgrown and disturbed by development. The fossils are from the Emigsville Member, and include the trilobite Olenellus thompsoni , the radiodont Lenisicaris pennsylvanica , the bivalve ...
Arctinurus boltoni is a large (up to 30 cm) lichid trilobite of the mid-Silurian. This trilobite reached about eight inches in length, though the normal adult carapace was about four inches. It lived in moderately deep-water in semi-tropical regions. Arctinurus fossils have been found in Europe and North America.