Journal ArticleDOI
The Full‐Glacial Vegetation of Northwestern Georgia
TLDR
Two small ponds in Bartow County, Georgia, northwest of Atlanta, originated by subsidence of unconsolidated surface deposits into solution hollows in the underlying lower Paleozoic Knox Dolomite as mentioned in this paper.Abstract:
Two small ponds in Bartow County, Georgia, northwest of Atlanta, originated by subsidence of unconsolidated surface deposits into solution hollows in the underlying lower Paleozoic Knox Dolomite. The pond sediments consist of copropelic clays 250—400 cm thick with well—preserved plant remains, covered by as much as 150 cm of colluvial deposits with moderately to poorly preserved plant fossils. The clays yield radiocarbon dates of 20,100 and 22,900 BP near their base, contemporaneous with the main Wisconsin glaciation. The full—glacial sediments are rich in pollen and plant macrofossils. The pollen assemblage is dominated by Pinus (pine), with small amounts of Picea (spruce), Quercus (oak), Ostrya type (hophornbeam), and herbaceous types. It closely resembles published full—glacial pollen assemblages from southeastern North Carolina. Pinus banksiana (jack—pine) and Picea sp. are represented by fossil needles at many levels, and the rich macroflora of aquatics shows a marked phytogeographical relationship w...read more
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Responses of plant populations and communities to environmental changes of the late Quaternary
TL;DR: The late Quaternary records indicate the modes and mechanisms of environmental variation and biotic responses at timescales of 101-104 years as mentioned in this paper. But these patterns of change are characteristic of terrestrial plants and animals but may not represent all other lifeforms or habitats.
Journal ArticleDOI
Seed dispersal and the holocene migration of woodland herbs
TL;DR: In this paper, the authors examined the long-term spread of the understory herb Asarum canadense by ants and found that the largest distance ants are known to move the seeds of any woodland herb is up to 35 m.
Journal ArticleDOI
Vegetation and environment in Eastern North America during the Last Glacial Maximum
Stephen T. Jackson,Robert S. Webb,Katharine H. Anderson,Jonathan T. Overpeck,Jonathan T. Overpeck,Thompson Webb,John W. Williams,Barbara C. Hansen +7 more
TL;DR: In this article, the authors assembled pollen and plant macro-fossil data from 21 and 17 well-dated LGM sites, respectively, for reconstructing the vegetation and environment of eastern North America during the Last Glacial Maximum (LGM).
Journal ArticleDOI
Quaternary history of deciduous forests of eastern North America and Europe
TL;DR: Campbell et al. as discussed by the authors found that the temperate deciduous forest of North America is more diverse than the decidious forest of western Europe, and that this difference has traditionally been explained by greater survival in North America of decduous species during the Quaternary.