A chronology of Late-Pleistocene permafrost events in southern New Jersey, eastern USA

French, H. M.; Demitroff, M.; Forman, S. L.; Newell, W. L.

Abstract:

Frost fissures, filled with wind-abraded sand and mineral soil, and numerous small-scale non-diastrophic deformations, occur in the near-surface sediments of the Pine Barrens of southern New Jersey. The fissures are the result of thermal-contraction cracking and indicate the previous existence of either permafrost or seasonally-frozen ground. The deformations reflect thermokarst activity that occurred when permafrost degraded, icy layers melted and density-controlled mass displacements occurred in water-saturated sediments. Slopes and surficial materials of the area reflect these cold-climate conditions. Optically-stimulated luminescence permits construction of a tentative Late-Pleistocene permafrost chronology. This indicates Illinoian, Early-Wisconsinan and Late-Wisconsinan episodes of permafrost and/or deep seasonal frost and a Middle-Wisconsinan thermokarst event. Copyright ?? 2007 John Wiley & Sons, Ltd.

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Article

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70032801

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French, H. M.; Demitroff, M.; Forman, S. L.; Newell, W. L.

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English

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Permafrost and Periglacial Processes

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A chronology of Late-Pleistocene permafrost events in southern New Jersey, eastern USA; 2007; Article; Journal; Permafrost and Periglacial Processes; French, H. M.; Demitroff, M.; Forman, S. L.; Newell, W. L.