Geolipid, pollen and diaton stratigraphy in postglacial lacustrine sediments
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چکیده
منابع مشابه
Lignin biomarkers and pollen in postglacial sediments of an Alaskan lake
We analyzed a 12,000-yr sediment core from Wien Lake, central Alaska, for a suite of phenolic products from CuO oxidation of lignin polymers and compared their composition with pollen data from the same core to assess lignin phenols as sedimentary biomarkers. Inferences of the gross taxonomic origin of sediment organic matter from lignin-phenol composition agree with vegetational reconstruction...
متن کاملA Consideration of Pollen, Diatoms and Other Remains in Postglacial Sediments
The significance of pollen and diatoms in post-glacial sediments from a shallow bay of Lake Okoboji, Iowa, is considered. The presence of other microfossils is noted with emphasis on those of Cretaceous origin: foraminifera, coccoliths, radiolari;ms, and hystrichosphaerids. Problems encountered and discussed include recognition of Chrysophyte statospores, redeposition, interpretation of data fr...
متن کاملWind-dispersed pollen mediates postglacial gene flow among refugia.
A long-term genetic legacy of refugial isolation has been postulated and was demonstrated for maternal refugial lineages for numerous plant and animal species. The lineages were assumed to have remained separated from each other for several glacial periods. The conifer Abies alba Miller, silver fir, is an excellent model to test whether pollen-mediated gene flow may eliminate the genetic imprin...
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Abell, P.I., Awramik, S.M., Osborne, R.H. and Tomellini, S., 1982. Plio-Pleistocene lacustrine stromatolites from Lake Turkana, Kenya: morphology, stratigraphy and stable isotopes. Sediment. Geol., 32: 1--26. A sequence of fossil stromatolites from Lake Turkana in Kenya was examined for 51SO and 513C content. These stromatolites, ranging in age from Holocene (~10,000 yrs B.P.) to Middle Pliocen...
متن کاملSpatial and temporal patterns of mercury accumulation in lacustrine sediments across the Laurentian Great Lakes region.
Data from 104 sediment cores from the Great Lakes and "inland lakes" in the region were compiled to assess historical and recent changes in mercury (Hg) deposition. The lower Great Lakes showed sharp increases in Hg loading c. 1850-1950 from point-source water dischargers, with marked decreases during the past half century associated with effluent controls and decreases in the industrial use of...
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ژورنال
عنوان ژورنال: Organic Geochemistry
سال: 1984
ISSN: 0146-6380
DOI: 10.1016/0146-6380(84)90093-7