CGRG Bibliography of Canadian Geomorphology
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Author : Baker, J.; Enkin, R.J.; Dallimore, A.; Pedersen, T.F.; and Southon, J.R.
Date : 2006.
Title : Physical properties of the 1-15KA MD02-2494 core; results from Effingham Inlet, B.C.
Publication : North Pacific Climate Workshop. Canadian Institute of Ocean Sciences, Sidney, British Columbia, Canada. March 1 to 3, 2006.
Issue :
Page(s) :
Abstract
The sedimentary record of Effingham Inlet, an anoxic basin on the west coast of Vancouver Island, British Columbia, provides several climate proxies spanning the Holocene and Late Pleistocene. However this record also includes signals from deglaciation and isostatic rebound, and seismicity. We have the opportunity to study Effingham Inlet sedimentation from a 40 meter, annually laminated marine sediment core (MD02-2494) from the French ship the Marion Dufresne, as part of the international IMAGES program. C14 dating, varve counting and paleomagnetic secular variation correlation are combined to produce a relaible age model. Physical properties and quantitative analysis of the sedimentology aid in the separation of the sedimentological components. In particular, two classes of massive intervals are observed which are interpreted to derive from either extreme weather (“homogenites”) or from seismicity (“seismites”). Magnetic properties help differentiate these massive layers, and lead to a chronology of west-coast seismicity. The frequency of homogenites increases throughout the Holocene, suggesting an increase in the intensity of El Nino cyclicity.
Bibliography of Canadian Geomorphology