Download Antarctic Paleobiology: Its Role in the Reconstruction of by James W. Collinson (auth.), Thomas N. Taylor, Edith L. PDF

By James W. Collinson (auth.), Thomas N. Taylor, Edith L. Taylor (eds.)

Antarctic Paleobiology discusses the present prestige of paleobiology, mostly paleobotany and palynology in Antarctica, and the interrelationship of Antarctic floras to these of different Gondwana continents. It offers a huge assurance of the most important teams of vegetation at the one hand, whereas at the different trying to evaluation the vegetational background and the actual and organic parameters that effect the distribution of floras via time and house. The biologic task is mentioned inside a framework of the geologic background, together with the tectonic and paleogeographic background of the quarter. eventually, the reader will discover a accomplished bibliography of Gondwana paleobotany and palynology.

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Additional info for Antarctic Paleobiology: Its Role in the Reconstruction of Gondwana

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6. equatorial heat exchange also would have occurred in the winter. The shape of the northeastern coastline and the termination of the continent just north of the equator would have shunted the equatorial current into the northern hemisphere. The entire southern coastline of Gondwana, from the region of Saudi Arabia to northern South America, would be expected to have been relatively wet, although the highest precipitation would have been in the west. India and easternmost Antarctica would have been relatively arid.

Furthermore, some elements of high-latitude floras have been interpreted as being evergreen. The survival of evergreen plants through a warm, protracted polar winter dark period has been doubted because of the likelihood that stored metabolites from summer photosynthesis would be rapidly exhausted (Wolfe 1980; Spicer 1987). The presence of evergreen plants might suggest a more even light profile throughout the year, and therefore, that in the past Earth's obliquity may have been less than at present (Wolfe 1980; Douglas and Williams 1982).

Cycads were apparently absent. Entire-margined angiosperm leaf forms appear to be slightly more diverse than in the Cenomanian, but sampling is limited. Campanian-Maastrichtian Asseinblages The upper part of the nonmarine Kogosukruk Tongue of the Prince Creek Formation is well exposed along 80 km of the Colville River between Uluksrak Bluffs and Ocean Point, northern Alaska. These coal-bearing rocks are considered to be of late Campanian to Maastrichtian age based on the palynoflora (Frederiksen et al.

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