| 词条 | Soncco Formation |
| 释义 |
| name = Soncco Formation | image = | caption = | type = Geological formation | age = Late Eocene-Early Oligocene {{fossil range|43|30}} | period = Oligocene | prilithology = Conglomerate, sandstone | otherlithology = Coal, lacustrine limestone | namedfor = Soncco | namedby = | region = Puno & Cusco Regions | country = {{PER}} | coordinates = {{coord|13|20|12|S|71|44|28|W|display=inline,title}} | unitof = San Jerónimo Group | subunits = C, D & E Members | underlies = Punacancha Fm., Tinajani Fm. | overlies = K'ayra Formation | thickness = {{convert|1600|m|ft|abbr=on}} | extent = | area = | map = Blakey 035Ma - COL.jpg | map_caption = Paleogeography of Northern South America, 35 Ma {{small|by Ron Blakey}} }}{{Location map | Peru | AlternativeMap = Peru physical map.svg | width = 330 | lat_deg = -13.336706 | lon_deg = -71.741044 | label = | float = right | position = right | mark = Orange pog.svg | marksize = 10 | caption = Type locality of the Soncco Formation in Peru }} The Soncco Formation is a Late Eocene to Early Oligocene geologic formation in southern Peru. The base of the formation at the contact with the K'ayra Formation is dated using fission track analysis at 43 Ma and the top, the contact with the Punacancha Formation, at 30 Ma.[1] In other places the Tinajani Formation overlies the Soncco Formation.[2] The formation has a thickness of {{convert|1600|m|ft}}.[3] Misattributed ornithopod tracksThe formation was first dated to the Cretaceous, and fossil ornithopod tracks had been reported.[4] Over 9,000 fossil tracks are said to be found within this formation.{{cn|date=June 2017}} As the formation has been dated to the Paleogene, the tracks could not be attributed to dinosaurs.[1] References{{Portal|Earth sciences|Paleontology|Peru|Paleogene|Prehistory of South America}}1. ^1 Carlotto, 2016, p.522 2. ^La Torre et al., 2004, p.116 3. ^Cusco.gob, 2015, p.120 4. ^Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. Bibliography
16 : Geologic formations of Peru|Paleogene Peru|Eocene Series of South America|Oligocene Series of South America|Tinguirirican|Divisaderan|Mustersan|Conglomerate formations|Coal formations|Limestone formations|Sandstone formations|Lacustrine deposits|Fossiliferous stratigraphic units of South America|Paleontology in Peru|Geography of Cusco Region|Geography of Puno Region |
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