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An iridescent ammonite from Madagascar Map of North America highlighting the shallow inland sea present during the mid-Cretaceous period. Ammolite comes from the fossil shells of the Upper Cretaceous disk-shaped ammonites Placenticeras meeki and Placenticeras intercalare, and (to a lesser degree) the cylindrical baculite, Baculites compressus.
Ammonites of prehistoric North America — a marine molluscs group of the prehistoric Cephalopods in North America. Subcategories This category has the following 5 subcategories, out of 5 total.
Johngarthia lagostoma is a species of terrestrial crab that lives on Ascension Island and three other islands in the South Atlantic. It grows to a carapace width of 110 mm (4.3 in) on Ascension Island, where it is the largest native land animal. [2] It exists in two distinct colour morphs, one yellow and one purple, with few intermediates.
This list of ammonites is a comprehensive listing of genera that are included in the subclass †Ammonoidea, excluding purely vernacular terms. The list includes genera that are commonly accepted as valid, as well as those that may be invalid or doubtful ( nomina dubia ), or were not formally published ( nomina nuda ), as well as junior ...
W. A. Cobban and Hook, S. C. 1983 Mid-Cretaceous (Turonian) ammonite fauna from Fence Lake area of west-central New Mexico. Memoir 41, New Mexico Bureau of Mines&Mineral Resources, Socorro NM. W. A. Cobban and Hook, S. C. 1979, Collignoniceras woollgari wooollgari (Mantell) ammonite fauna from Upper Cretaceous of Western Interior, United States.
The Gabbs Formation is a geologic formation in Nevada.It preserves fossils dating back to the Late Triassic and Early Jurassic periods, and is one of the few formations in the United States known to include the Triassic-Jurassic boundary.
The Chazy Fossil Reef National Natural Landmark includes three islands in Lake Champlain.Included within the designated area are two preserves on Vermont's Isle La Motte; the 20-acre (8.1 ha) Fisk Quarry Preserve and the 83-acre (34 ha) Goodsell Ridge Preserve are both open to the public and managed by the Isle La Motte Preservation Trust. [2]
A. Abbasites; Abrytasites; Acanthaecites; Acanthoceras (ammonite) Acanthodiscus; Acantholytoceras; Acanthopleuroceras; Acanthoptychoceras; Acanthoscaphites; Acompsoceras