Lopez de Bertodano Formation
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The Lopez de Bertodano Formation is a geological formation in the James Ross archipelago of the Antarctic Peninsula. The strata date from the end of the Late Cretaceous (upper-lower Maastrichtian stage[1]) to the Danian stage of the lower Paleocene, from about 70 to 65.5 million years ago, straddling the Cretaceous-Paleogene boundary.[2]
Quick Facts Type, Unit of ...
Lopez de Bertodano Formation | |
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Stratigraphic range: Maastrichtian-Danian ~70–65.5 Ma | |
Type | Geological formation |
Unit of | Marambio & Seymour Island Groups |
Sub-units | Cape Lamb & Lower Sandwich Bluff Members |
Underlies | Sobral Fm., La Meseta Fm. |
Overlies | Snow Hill Island Formation |
Lithology | |
Primary | Siltstone, mudstone |
Other | Sandstone with concretions |
Location | |
Coordinates | 64.0°S 57.4°W / -64.0; -57.4 |
Approximate paleocoordinates | 61.9°S 68.1°W / -61.9; -68.1 |
Region | Seymour Island, James Ross Island group, Vega Island |
Country | Antarctica |
Type section | |
Named for | López de Bertodano Bay |
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