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- Nacimiento_Formation abstract "The Nacimiento Formation is a sedimentary rock formation found in the San Juan Basin of western New Mexico (United States) and named for the Nacimiento Mountains. It is a heterogeneous nonmarine formation composed of shale, siltstone, and sandstone, deposited in floodplain, fluvial and lacustrine settings, and made up of sediment shed from the San Juan uplift to the north and the Brazos-Sangre de Cristo uplift to the east. It was deposited mostly between ~64.5 and ~61 million years ago, during the early and middle Paleocene. The climate was humid and warm to hot. This unit interbeds with the underlying Ojo Alamo Formation but is separated by an unconformity from the overlying San Jose Formation.Workers in the early 1900s divided the rocks of the Nacimiento Formation into two formations, the lower Puerco Formation and the upper Torrejon Formation. This was rejected on the grounds that there were no lithological differences between the two, only differences in fossil faunas, making determination of which formation was present in a given area impossible if fossils could not be found. The Puerco and Torrejon were retained as zones within the Nacimiento Formation, and their faunas became the basis of the Puercan and Torrejonian North American Land Mammal Ages.The Nacimiento Formation is divided into several subunits known as members. In outcrops in southern areas of the formation, the Puercan fauna is found in the Arroyo Chijuillita Member, the Torrejonian fauna is found in the Ojo Encino Member, and the uppermost Escavada Member lacks age-diagnostic fossils. In northern outcrops, the two lower formations are indistinguishable, and are called the \"main body\". Above them are two more members, as yet unnamed except in a thesis. They preserve a younger, Tiffanian fauna. The Puercan and Torrejonian faunas are further subdivided into several biostratigraphic zones.Many fossils are known from the Nacimiento Formation, although bone is often altered into phosphatic concretions. Fossils belonging to a number of different organisms have been found here, including: plants (mostly dicotyledonous angiosperms), gastropods, freshwater bivalves, cartilaginous fish and bony fish, salamanders, turtles, champsosaurs, amphisbaenians, lizards, snakes, crocodilians, birds, and a variety of archaic mammals. Mammalian groups represented include multituberculates, didelphid marsupials, insectivorans, plesiadapiforms, carnivorans, taeniodonts, mesonychids, condylarths, and cimolestans.".
- Nacimiento_Formation thumbnail Angel_Peak.jpg?width=300.
- Nacimiento_Formation wikiPageID "21441424".
- Nacimiento_Formation wikiPageLength "7803".
- Nacimiento_Formation wikiPageOutDegree "49".
- Nacimiento_Formation wikiPageRevisionID "655354136".
- Nacimiento_Formation wikiPageWikiLink Amphisbaenia.
- Nacimiento_Formation wikiPageWikiLink Biostratigraphy.
- Nacimiento_Formation wikiPageWikiLink Bivalvia.
- Nacimiento_Formation wikiPageWikiLink Carnivora.
- Nacimiento_Formation wikiPageWikiLink Category:Geologic_formations_of_New_Mexico.
- Nacimiento_Formation wikiPageWikiLink Category:Natural_history_of_New_Mexico.
- Nacimiento_Formation wikiPageWikiLink Category:Paleontological_sites_of_North_America.
- Nacimiento_Formation wikiPageWikiLink Category:Paleontology_in_New_Mexico.
- Nacimiento_Formation wikiPageWikiLink Chondrichthyes.
- Nacimiento_Formation wikiPageWikiLink Choristodera.
- Nacimiento_Formation wikiPageWikiLink Cimolesta.
- Nacimiento_Formation wikiPageWikiLink Concretion.
- Nacimiento_Formation wikiPageWikiLink Condylarth.
- Nacimiento_Formation wikiPageWikiLink Dicotyledon.
- Nacimiento_Formation wikiPageWikiLink Floodplain.
- Nacimiento_Formation wikiPageWikiLink Flowering_plant.
- Nacimiento_Formation wikiPageWikiLink Fossil.
- Nacimiento_Formation wikiPageWikiLink Fresh_water.
- Nacimiento_Formation wikiPageWikiLink Gastropoda.
- Nacimiento_Formation wikiPageWikiLink Geological_formation.
- Nacimiento_Formation wikiPageWikiLink Insectivora.
- Nacimiento_Formation wikiPageWikiLink Lake.
- Nacimiento_Formation wikiPageWikiLink Lithology.
- Nacimiento_Formation wikiPageWikiLink Marsupial.
- Nacimiento_Formation wikiPageWikiLink Mesonychid.
- Nacimiento_Formation wikiPageWikiLink Multituberculata.
- Nacimiento_Formation wikiPageWikiLink Nacimiento_Mountains.
- Nacimiento_Formation wikiPageWikiLink New_Mexico.
- Nacimiento_Formation wikiPageWikiLink North_American_land_mammal_age.
- Nacimiento_Formation wikiPageWikiLink Ojo_Alamo_Formation.
- Nacimiento_Formation wikiPageWikiLink Opossum.
- Nacimiento_Formation wikiPageWikiLink Osteichthyes.
- Nacimiento_Formation wikiPageWikiLink Phosphate.
- Nacimiento_Formation wikiPageWikiLink Plesiadapiformes.
- Nacimiento_Formation wikiPageWikiLink Puercan.
- Nacimiento_Formation wikiPageWikiLink River.
- Nacimiento_Formation wikiPageWikiLink San_Jose_Formation.
- Nacimiento_Formation wikiPageWikiLink San_Juan_Basin.
- Nacimiento_Formation wikiPageWikiLink Sandstone.
- Nacimiento_Formation wikiPageWikiLink Sedimentary_rock.
- Nacimiento_Formation wikiPageWikiLink Shale.
- Nacimiento_Formation wikiPageWikiLink Siltstone.
- Nacimiento_Formation wikiPageWikiLink Stratigraphic_unit.
- Nacimiento_Formation wikiPageWikiLink Taeniodont.
- Nacimiento_Formation wikiPageWikiLink Tiffanian.
- Nacimiento_Formation wikiPageWikiLink Torrejonian.
- Nacimiento_Formation wikiPageWikiLink Unconformity.
- Nacimiento_Formation wikiPageWikiLink United_States.
- Nacimiento_Formation wikiPageWikiLink File:Angel_Peak.jpg.
- Nacimiento_Formation wikiPageWikiLinkText "Nacimiento Formation".
- Nacimiento_Formation wikiPageUsesTemplate Template:Reflist.
- Nacimiento_Formation subject Category:Geologic_formations_of_New_Mexico.
- Nacimiento_Formation subject Category:Natural_history_of_New_Mexico.
- Nacimiento_Formation subject Category:Paleontological_sites_of_North_America.
- Nacimiento_Formation subject Category:Paleontology_in_New_Mexico.
- Nacimiento_Formation hypernym Formation.
- Nacimiento_Formation type MilitaryUnit.
- Nacimiento_Formation type Site.
- Nacimiento_Formation comment "The Nacimiento Formation is a sedimentary rock formation found in the San Juan Basin of western New Mexico (United States) and named for the Nacimiento Mountains. It is a heterogeneous nonmarine formation composed of shale, siltstone, and sandstone, deposited in floodplain, fluvial and lacustrine settings, and made up of sediment shed from the San Juan uplift to the north and the Brazos-Sangre de Cristo uplift to the east.".
- Nacimiento_Formation label "Nacimiento Formation".
- Nacimiento_Formation sameAs Q6957247.
- Nacimiento_Formation sameAs m.05fbbr8.
- Nacimiento_Formation sameAs Q6957247.
- Nacimiento_Formation wasDerivedFrom Nacimiento_Formation?oldid=655354136.
- Nacimiento_Formation depiction Angel_Peak.jpg.
- Nacimiento_Formation isPrimaryTopicOf Nacimiento_Formation.