| 词条 | Buen Formation |
| 释义 |
| name = Buen Formation | image = | caption = | type = Formation | age = Cambrian Series 2 (Atdabanian) ~{{fossil range|520|513}} | period = Cambrian | prilithology = Mudstone | otherlithology = Sandstone, shale | namedfor = | namedby = | region = Peary Land | country = Greenland | coordinates = {{coord|83.1|N|33.8|W|display=inline,title}} | paleocoordinates = {{coord|22.1|S|49.0|W|display=inline}} | unitof = Sirius Passet | subunits = | underlies = | overlies = | thickness = | extent = | area = | map = {{Location map+ | Greenland | relief = 1 | width = 200 | float = center | places = | lat_deg = 83.1 | lon_deg = -33.8 | mark = Dark Green 004040 pog.svg | marksize = 12 }} {{Location map~ | Greenland| lat_deg = 81.6 | lon_deg = -16.7 | mark = Dark Green 004040 pog.svg | marksize = 12 }} {{Location map~ | Greenland| lat_deg = 82.8 | lon_deg = -34.7 | mark = Dark Green 004040 pog.svg | marksize = 12 }} {{Location map~ | Greenland| lat_deg = 82.9 | lon_deg = -44.1 | mark = Dark Green 004040 pog.svg | marksize = 12 }} {{Location map~ | Greenland| lat_deg = 82.8 | lon_deg = -42.2 | mark = Dark Green 004040 pog.svg | marksize = 12 }} {{Location map~ | Greenland| lat_deg = 83.4 | lon_deg = -51.3 | mark = Dark Green 004040 pog.svg | marksize = 12 }} {{Location map~ | Greenland| lat_deg = 82.6 | lon_deg = -32.5 | mark = Dark Green 004040 pog.svg | marksize = 12 }} | map_caption = }} The Buen Formation is a geologic formation in the north of Greenland. The shale preserves fossils dating back to the Early Cambrian period (Atdabanian in the local timescale, about 520 to 513 Ma).[1] DescriptionThe oldest Cambrian series of the area was deposited in the Franklinian Basin and is poorly exposed in fragmentary, heavily metamorphosed outcrops in Peary Land. It was emplaced during the Ellesmerian orogeny.[2][3] The formation consists of a lower sandstone member and an upper mudstone member, deposited in an offshore shelf environment.[4] Fossil content{{colbegin|colwidth=20em}}
See also{{Portal|Geology|Greenland|Paleontology|Cambrian|Prehistory of North America}}
References1. ^Buen Formation at Fossilworks.org 2. ^Geyer & Peel, 2011, p.466 3. ^Higgins et al., 2000, p.141 4. ^Buen Formation at Fossilworks.org 5. ^Peel & Willman, 2018, p.381 6. ^Conway Morris & Peel, 2008, p.144 Bibliography
Further reading
9 : Geologic formations of Greenland|Cambrian Greenland|Cambrian southern paleotemperate deposits|Cambrian southern paleotropical deposits|Mudstone formations|Sandstone formations|Shale formations|Open marine deposits|Paleontology in Greenland |
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