General Account of the Fresh-water Morasses of the United States, with a Description of the Dismal Swamp District of Virginia and North Carolina |
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accumulation action afford Albemarle Sound alluvial alluvium amount ANNUAL REPORT PL attain bald cypress beds bench beneath black gum bog-iron Carolina channel character coast considerable cypress decay deposits depth desiccation Diagram showing Dismal Swamp Canal Dismal Swamp district ditches drainage drained effaced effect elevation erosion evidence excavated extensive fact feet flood forest formed glacial glacier growth height inundated lands James River kame Lake Drummond mangrove margin marshes Mississippi delta moraines morasses Nansemond escarpment North northern occupied original peat peaty matter peculiar plain plants Pliocene portion present probably quaking bog reentrant region river rocks roots sands sediment seed shallow shore slope soil southern species sphagnum square miles strata streams Suffolk surface swamp areas swamp water Taxodium TENTH ANNUAL REPORT tillage timber tion tolerably topography trees tributary U. S. GEOLOGICAL SURVEY valleys vegetable matter Virginia Wallaceton