Hispanopedia Wiki
Articulo de referencia

Washington Formation

{{cite journal |last1=Berryhill |first1=Henry L. Jr.|last2=Swanson |first2=Vernon E. |title=Geological Survey research 1962; Short papers in geology and hydrology |journal=U.S. ...

Hispanopedia WikiContenido en espanolLectura gratuita

The Washington Formation is a coal, sandstone, and limestone geologic formation located in Ohio, Pennsylvania and West Virginia.[1] It dates back to the Lower Permianperiod, with its base at or near the Permian/Carboniferous boundary.[2][3] The Washington formation and the Dunkard Group as a whole was deposited at a time when the continents were in the process of forming the "Super Continent" Pangaea as well as a gradual drop in sea levels.[4] The result during this period was coals being thinner and impure with high ash content. The limestones found with in the formation are exclusively freshwater deposits.

Paleofauna

The paleofauna of the Washington Formation is considered similar to that of the Texas Red Beds, sharing many fish and tetrapod taxa. Some of the taxa listed suggest an Artinskian age.[5] Lucas et al 2013 discusses the fauna of the formation.[5]

Synapsida

Reptiliomorpha

Amphibia

Selachia

Osteíctios

Referencias

  1. 1 2 Berryhill, Henry L. Jr.; Swanson, Vernon E. (1962). "Investigación del Servicio Geológico 1962; Documentos breves en geología e hidrología" (PDF) . Documento profesional del Servicio Geológico de los Estados Unidos . 450-C: 43–46 . Recuperado el 30 de junio de 2018 .
  2. ↑ Wayne Martin, Bernard Henniger ( 1965). "Las areniscas de Hockingport y Waynesburg (Pensilvánico y Pérmico) del Grupo Dunkard: RESUMEN" . AAPG Bulletin . 49. doi : 10.1306/a66335b4-16c0-11d7-8645000102c1865d . ISSN 0149-1423 . 
  3. ↑ MA Rendina, Wayne D. Martin ( 1985). "Procedencia de areniscas y rocas arcillosas seleccionadas del Grupo Dunkard (Pensilvaniense superior-Pérmico) en Ohio, Virginia Occidental y Pensilvania: RESUMEN" . AAPG Bulletin . 69. doi : 10.1306/94885417-1704-11d7-8645000102c1865d . ISSN 0149-1423 . 
  4. ↑ Haq, Bilal U.; Schutter, Stephen R. (2008-10-03). "Una cronología de los cambios del nivel del mar en el Paleozoico" . Science . 322 (5898): 64– 68. Bibcode : 2008Sci...322...64H . doi : 10.1126/science.1161648 . ISSN 0036-8075 . PMID 18832639 .  
  5. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Lucas , Spencer G. ( 2013-11-01 ) . " Bioestratigrafía y biocronología de vertebrados del Grupo Dunkard del Paleozoico superior, Pensilvania-Virginia Occidental-Ohio, EE. UU . " . International Journal of Coal Geology . SI:Dunkard Group Geology. 119 : 79– 87. Bibcode : 2013IJCG..119...79L . doi : 10.1016/j.coal.2013.04.007 . ISSN 0166-5162 . 
  6. ↑ Olson, Everett C. (1970-02-05). "Trematops Stonei sp. nov. (Temnospondyli Amphibia) de la Formación Washington, Grupo Dunkard, Ohio" . Kirtlandia . 8 : 1–12 .
  7. ↑ House, Ashley (2025). "Un nuevo sinápsido esfenacodonte de la Formación Washington del Pérmico temprano de Ohio, EE. UU." (PDF) .
  8. ↑ Johnston, Gary (2003). "Denticiones de Barbclabornia (nuevo género, Chondrichthyes: Xenacanthiformes) del Paleozoico Superior de América del Norte" .