RADIOACTIVE "BLACK SAND " DEPOSITS on the NORTH SHORE OF LONG ISLAND
Long Island has a core of Upper Cretaceous sedimentary strata of coarse sand, gravel and clay overlain by Late and Mid Wisconsinan interstadial deposits above Altonian (Early Wisconsinan) drift. The Late Wisconsinan (Woodfordian) multi-lobed ice sheet reached its terminal position about 21,750 years...
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.606.148 http://pbisotopes.ess.sunysb.edu/lig/Conferences/abstracts-01/harbottle-abst.pdf |