Studies of cores from three major estuaries in the middle Atlantic region (Hudson River, Delaware Bay, and Chesapeake Bay) reveal the following: (1) much of the upper Wisconsinan-Holocene estuarine facies consists of organic-rich fine-grained clasts; (2) major aggradation of this facies began about 11,000 radiocarbon years B.P. and possibly somewhat earlier; (3) chemical and semi-quantitative analyses of estuarine facies samples from the three areas show the facies are very similar, whereas a lacustrine fades in the Hudson estuary has a significantly different chemical composition than the estuarine facies; (4) the clay mineralogy in the estuarine facies in all three areas is similar (all clay-types are present--kaolinite, illite, montmorillonite, and chlorite); and (5) playnologic studies indicate that the forests bordering the estuaries were progressively more aboreal from south to north during the period of aggradation of the estuaries.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.