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Lopez de Bertodano Formation
The Lopez de Bertodano Formation is a geological formation in the James Ross archipelago of the Antarctic Peninsula. The strata date to the end of the Late Cretaceous (upper-lower Maastrichtian stage〔Olivero, E.B., Ponce, J.J., Marsicano, C.A. and Martinioni, D.R. (2007). "Depositional settings of the basal Lopez de Bertodano Formation, Maastrichtian, Antarctica." ''Revista de la Asociación Geológica Argentina'', 62(4): 521-529.〕), about 70-66 million years ago. Dinosaur remains are among the fossils that have been recovered from the formation〔Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Antarctica)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. p. 606. ISBN 0-520-24209-2.〕 and include at least two and probably as much as six lineages of indisputably modern birds: one related to waterfowl, a primitive shorebird or related form, 1-2 species of possible loons, a large and possibly flightless bird belonging to a lineage extinct today as well as a partial skull that might belong to either of the smaller species or represent yet another one.
==See also==
* List of dinosaur-bearing rock formations
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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