Wellington Formation
Geological formation / From Wikipedia, the free encyclopedia
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The Wellington Formation is an Early Permian geologic formation in Kansas and Oklahoma.[2] The formation's Hutchinson Salt Member is more recognized by the community than the formation itself, and the salt is still mined in central Kansas.[3] The Wellington provides a rich record of Permian insects and its beddings provide evidence for reconstruction of tropical paleoclimates of the Icehouse Permian with the ability in cases to measure the passage of seasons.[4] Tens of thousands of insect fossil recovered from the Wellington shales are kept in major collections at the Harvard Museum of Comparative Zoology and Yale Peabody Museum of Natural History.[5]
Wellington Formation | |
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Stratigraphic range: Early Permian(Artinskian) ~290–280 Ma | |
Type | Formation |
Unit of | Sumner Group |
Sub-units | Lower Wellington Member, Hutchinson Salt Member, Carlton Limestone Member, Upper Wellington Member |
Underlies | Central-Western Kansas: (relative to the Sixth principal meridian)[1] East: Kiowa Shale Over: Pleistocene terraces West: Ninnescah Shale Northcentral Oklahoma: Hennessey Formation Garber Sandstone |
Overlies | Nolans Limestone |
Thickness | 500–700 ft (150–210 m) |
Lithology | |
Primary | Shale/mudstone/dolomite Salt/anhydrite/gypsum |
Location | |
Coordinates | 38.6°N 97.2°W / 38.6; -97.2 |
Approximate paleocoordinates | 3.6°N 25.8°W / 3.6; -25.8 |
Region | Kansas Oklahoma |
Country | United States |
Type section | |
Named for | Wellington, Kansas |
Named by | F. W. Cragin[2] |