STRATIGRAPHIC POLLEN ANALYSIS OF ELEVEN CORES NEAR EDGEWOOD, MARYLAND
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资源简介：
Several cores were extracted from sediments of the peninsula between the Bush and
Gunpowder Rivers near Edgewood Maryland. Samples were extracted at irregular intervals from
eleven of these cores and submitted for environmental pollen analysis in order to assist in
determining ages for strata underlying the peninsula. Accurate determination of biostratigraphic
ages are difficult, at best, and require extensive, close-interval sampling to determine changes in
frequency and the appearance and disappearance of pollen types from the record. The samples
extracted from these cores represent intervals no closer than eleven feet apart, and generally
dozens to nearly a hundred feet apart. Given the irregular and widespread samples, only coarse
interpretations of the sediments below the peninsular are possible
创建时间：
2012-12-07
