Journal of Siberian Federal University. Engineering & Technologies / Exotic Grains in a Core from Cornwall, NY - Do They Have an Impact Source?

Full text (.pdf)
Issue
Journal of Siberian Federal University. Engineering & Technologies. 2010 3 (1)
Authors
Abbott, Dallas H.; Gerard-Little, Perri; Coste, Sarah; Coste, Stephanie; Breger, Dee; Haslett, Simon K.
Contact information
Abbott, Dallas H. : Lamont Doherty Earth Observatory of Columbia University; Palisades, NY 10964, USA, e-mail: ; Gerard-Little, Perri : Lamont Doherty Earth Observatory of Columbia University; Palisades, NY 10964, USA,; Coste, Sarah : Lamont Doherty Earth Observatory of Columbia University; Palisades, NY 10964, USA,; Coste, Stephanie : Lamont Doherty Earth Observatory of Columbia University; Palisades, NY 10964, USA,; Breger, Dee : Micrographic Arts; Greenfield Center, NY 12833, USA,; Haslett, Simon K. : CELT, University of Wales; Newport, Lodge Road, Caerleon, South Wales, NP18 3QT, UK,
Keywords
sedimentation rate; sediment transport; scanning electron microscope (SEM) analysis; impact ejecta layer; impact hypothesis during late Holocene time; tsunami hazard in the Atlantic Ocean
Abstract

We have found seven discrete layers in a bog core from Cornwall, NY about 80 km away from the Atlantic Ocean. All but two layers contain material that is unlikely to be locally derived. In most cases, the material in the layers has been transported thousands of kilometers from its source area. Six out of the seven layers are difficult to explain except through impact processes. If all of these layers are derived from impacts that produced craters, the data imply a very high impact rate during late Holocene time. In addition, we have been able to associate two of the impact ejecta layers with dated tsunami events that span the Atlantic Ocean. If this discovery is validated by further research, it implies a much larger tsunami hazard in the Atlantic Ocean than previously reported.

Pages
5-29
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/1632

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