| 词条 | Portezuelo Formation |
| 释义 |
| name = Portezuelo Formation | image = | caption = | type = Geological formation | period = Coniacian | age = Late Turonian-Early Coniacian ~{{fossil range|91|88}} | prilithology = Sandstone | otherlithology = Conglomerate, limestone | namedfor = Sierra del Portezuelo | namedby = | region = Mendoza, Río Negro & Neuquén Provinces | country = {{ARG}} | coordinates = {{coord|38.5|S|68.7|W|display=inline,title}} | paleocoordinates = {{coord|44.4|S|47.2|W|display=inline}} | unitof = Neuquén Group Río Neuquén Subgroup | subunits = | underlies = Plottier Formation | overlies = Río Limay Subgroup Lisandro Formation | thickness = {{convert|95|-|130|m|ft|abbr=on}} | extent = Neuquén Basin | area = | map = {{Location map+ | Argentina | relief = 1 | width = 250 | float = center | places = | lat_deg = -38.5 | lon_deg = -68.7 | mark = Lightgreen pog.svg | marksize = 12 }} | map_caption = }} The Portezuelo Formation is a geologic formation of Late Cretaceous (Late Turonian to Early Coniacian) age, outcropping in the Mendoza, Río Negro and Neuquén provinces of Argentina.[1] It is the fourth-oldest formation in the Neuquén Group and the older of the two formations in the Río Neuquén Subgroup. Formerly, that subgroup was treated as a formation, and the Portezuelo Formation was known as the Portezuelo Member.[2] DescriptionThe type locality of the Portezuelo Formation is the mountain range known as Sierra del Portezuelo in Neuquén Province.[3] This formation conformably overlies the Lisandro Formation of the Río Limay Subgroup. In the top layers it grades into the Plottier Formation, the younger formation within the Río Neuquén Subgroup. Sandstones and siltstones, probably deposited under fluvial conditions, make up the Portezuelo Formation. There are also occasional cemented claystone deposits, as well as numerous paleosols (fossil soils). The formation varies between {{convert|95|and|130|m|ft}} thick throughout its range.[2][4]Fossil contentMany dinosaur fossils have recently been described from this formation, as well as remains of several other types of animals:
See also{{portal|Argentina|Cretaceous|Paleontology|Prehistory of South America}}
References{{commonscat|Portezuelo Formation}}1. ^Portezuelo Formation at Fossilworks.org 2. ^1 Sánchez et al., 2006 3. ^Wichmann, 1929 4. ^Leanza et al., 2004 5. ^1 2 3 Agnolin et al., 2006 6. ^Porfiri et al., 2007 Bibliography
|year=2007 |title=New record of Neuquenraptor (Theropoda, Dromaeosauridae) from the Late Cretaceous of Patagonia |url=https://www.researchgate.net/publication/275889462_New_record_of_Neuquenraptor_Theropoda_Dromaeosauridae_from_the_Late_Cretaceous_of_Patagonia |publisher=Jornadas Argentinas de Paleontología de Vertebrados |pages=34R |accessdate=2019-02-16}}
14 : Geologic formations of Argentina|Portezuelo Formation|Cretaceous Argentina|Turonian Stage|Coniacian Stage|Sandstone formations|Conglomerate formations|Limestone formations|Fluvial deposits|Cretaceous paleontological sites of South America|Paleontology in Argentina|Geology of Mendoza Province|Geology of Neuquén Province|Geology of Río Negro Province |
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