Abstract
An increase in the cosmogenic beryllium-10 content of the Orca basin sediments due to the flooding of the Gulf of Mexico (GM) by meltwaters during the late Wisconsin interglacial is reported. A strong negative correlation (γ =-0.99) betweenδ 18O (in the range o f-1.5‰ to +0.5‰) and10Be/Al ratio is seen. During intense flooding reflected by a decrease in δ18O by ∼ 2‰, this correlation may not hold as some of the sediments with low10Be/Al ratio and deposited on the shelf and slope regions of the GM during the earlier glacial period would also be washed into the basin. The deposited sediment would then be a mixture with a10Be/Al ratio lower than expected from the correlation
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Somayajulu, B.L.K. 10Be meltwater signal in Orca basin sediments, Gulf of Mexico. Proc. Indian Acad. Sci. (Earth Planet Sci.) 105, 357–364 (1996). https://doi.org/10.1007/BF02842310
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DOI: https://doi.org/10.1007/BF02842310