Abstract
In the Robinson Mountains of the southern Alaska Coast Range, the upper Cenozoic Yakataga Formation consists of more than 5,000 m of interbedded marine, glacial-marine, and glacial-fluvial deposits. Lithofacies, biofacies, and chronostratigraphic analyses indicate four relatively cool paleoclimatic intervals alternating with four relatively warm paleoclimatic intervals. Cool intervals are represented by the predominance of glacial lithofacies associated with populations of Neogloboquadrina pachyderma s. l. Warm intervals are represented by lithofacies having few or no glacially derived deposits.
Strata of glacial origin are recognized by the specific facies associations dominated by diamictites with floating clasts interpreted as ice-rafted erratics. Lithofacies include those deposited in ice-contact or glacial-aqueous depositional environments. Glacial-aqueous deposits recognized are of two principal types: glacial-fluvial and glacial-marine. Lithofacies sequences and geometries define non-marine, shoreline, fjord and open-marine facies associations.
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Armentrout, J.M. (1983). Glacial Lithofacies of the Neogene Yakataga Formation Robinson Mountains, Southern Alaska Coast Range, Alaska. In: Molnia, B.F. (eds) Glacial-Marine Sedimentation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3793-5_16
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DOI: https://doi.org/10.1007/978-1-4613-3793-5_16
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