|
Prehistoric Trackways National Monument is the 100th national monument in The United States of America. The monument is located in the Robledo Mountains, near Las Cruces in the southern region of the U.S. state of New Mexico. The monument's fossilized features are on 〔 of Bureau of Land Management administered land in Doña Ana County. ==Fossils== The Prehistoric Trackways National Monument site includes a major deposit of Paleozoic Era fossilized footprints in fossil mega-trackways of land animals, sea creatures, and insects. These are known as trace fossils or ichnofossils. There are also fossilized plants and petrified wood present. Much of the fossilized material originated during the Permian Period and is around 280 million years old.〔 Some of the animals who may have left tracks in the Robledo mountains include; Dimetrodon, Eryops, Edaphosaurus, and multiple other pelycosaurs. There are at least 13 major trace fossils found at the monument and include Selenichnites (sel-EEN-ick-NIGHT eez) or moon-shaped trace, Kouphichnium (koof-ICK-nee-um) or light trace, Palmichnium (pal-ICK-nee-um) or palm () trace, Octopodichnus (oct-toe-pod-ICK-nuss) or eight-footed trace, Lithographus (lith-oh-GRAFF-us) or rock writing, Tonanoxichnus (tong-a-nox-ICK-nuss) or Tonganoxie () trace, Augerinoichnus (aw-gurr-EE-no-ICK-nuss) or Augerino trace, Undichna (und-ICK-nuh) or wave-shaped trace, Serpentichnus (serpent-ICK-nuss) or snake-like trace, Batrachichnus (baa-track ICK-nuss) or frog trace, Dromopus (dro-MOE-puss) or running foot, and Dimetropus (die-MEET-row puss) or Dimetrodon foot. Trackways can be difficult for the general public to find at the monument and few facilities have yet been developed. Many of the slabs pulled out by Jerry MacDonald are housed at the New Mexico Museum of Natural History and Science, although they are not on display at this time. Guided hikes are offered by BLM interpretive staff periodically.〔 There are plenty of marine invertebrate fossils to be found in the monument, they include Brachiopods, Gastropods, Cephalopods, Bivalves, and Echinoderms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prehistoric Trackways National Monument」の詳細全文を読む スポンサード リンク
|