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Title Postglacial wetland paleohydrology, southeastern United States: what is the climatic signal.
Creator/Author Stone, P.A. ; Gleason, P.J. ; Stipp, J.J. ; Johnson, R.
Publication Date1985 Jan 01
OSTI IdentifierOSTI ID: 6070864
Report Number(s)CONF-8510489-
Other Number(s)CODEN: GAAPB
Resource TypeConference
Specific TypeJournal Article
Resource RelationGeol. Soc. Am., Abstr. Programs ; Vol/Issue: 17; 98. annual meeting of the Geological Society of America; 28 Oct 1985; Orlando, FL, USA
Research OrgUniv. of South Carolina, Columbia (USA)
Subject580100 -- Geology & Hydrology-- (-1989); FLORIDA-- WETLANDS;GEORGIA-- WETLANDS;PEAT-- DEPOSITION;WETLANDS-- CLIMATE MODELS;WETLANDS-- HYDROLOGY; CLIMATES;PALEOCLIMATOLOGY;SEA LEVEL;STRATIGRAPHY;VARIATIONS
Related SubjectAQUATIC ECOSYSTEMS;ECOSYSTEMS;ENERGY SOURCES;FEDERAL REGION IV;FOSSIL FUELS;FUELS;GEOLOGY;LEVELS;MATHEMATICAL MODELS;NORTH AMERICA;ORGANIC MATTER;PALEONTOLOGY;USA
Description/Abstract Much of the abundant wetland area in S.E.U.S. that accretes autochthonous sediment (peat, muck, calcitic mud) began to do so in post-glacial times (less than or equal to ca.^13,000 B.P.^(/sup 14/C yr)).^Inundation intensities exert ecologic controls on the types of sediments produced.^Paleobotanical evidence in peats, via ecologic inferences, indicates a restricted range of paleohydrologic conditions.^Calcitic muds in South Florida indicate marshes with prolonged dry seasons.^Onsets and stratigraphic changes in sedimentation indicate the occurrence of hydrologic changes.^Radiocarbon correlation of widespread changes in different topographic settings allow the rejection of certain nonclimatic factors and the major factor of rising Holocene sea level.^A major climatic component is evidenced for each major regional hydrologic shift.^Deglaciation elsewhere was accompanied in S.E.U.S. by the onset of wetter condition despite a low sea level.^An areal explosion of peat deposits occurred in mid-Holocene times (most ca.^6500-4500 B.P.) and included areas elevated and isolated from rising sea level (e.g., Okefenokee Swamp, Ga., ca.^30 m msl).^Increasing surface wetness was interrupted, at least in the Everglades, by a ca.^1000-1500 year drier period beginning ca.^3000 B.P., evidenced by an intercalated calcitic-mud layer in marsh peats.^Evidence for concurrent higher levels of Lake Okeechobee also may reflect increased seasonality or else temperate-vs-tropical differences, in that the lake`s watershed experiences a more-temperate climate.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 729
System Entry Date2001 May 13

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