Results 171 to 180 of about 855 (200)

Paleosalinity Relationships of Dinoflagellates in the Late Quaternary of the Black Sea: A Summary

Proceedings of the Annual Meeting. American Association of Stratigraphic Palynologists, 1973
Abstract Dinoflagellates in Late Quaternary sediments from deepwater cores in the Black Sea appear to fall into two ecological categories that are dependent upon paleosalinity relationships. Sediments deposited there during the last 7,000 years contain cosmopolitan, euryhaline species of common marine genera and represent the brackish‐water Old Black ...
David Wall, Barrie Dale
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Jurassic paleosalinities and brackish-water communities; a case study

PALAIOS, 1995
The Great Estuarine Group (late Bajocian-Bathonian, Middle Jurassic, Scotland) yields benthic molluscan faunas whose distribution was believed to be controlled largely by salinity; different genera characterize a spectrum of mainly brackish-water environments. Benthic molluscan assemblages are also affected by substrate.
John D. Hudson, Roy G. Clements, James B. Riding, Matthew I. Wakefield, William Walton   +4 more
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Sedimentary Phosphate Method for Estimating Paleosalinities: A Paleontological Assumption

Science, 1969
Paleosalinity values in certain rocks determined by the sedimentary phosphate method differ from salinity estimates based upon contained fossil assemblages, geochemical methods, and existing stratigraphic controls. Some anomalous values are related to the abundance of fossil organisms known to be concentrators of calcium phosphate.
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Sedimentary Phosphate Method for Estimating Paleosalinities: Limited Applicability

Science, 1969
The sedimentary phosphate method for estimating paleosalinities was tested on argillaceous sediments from different formations and environments. Results reveal that the method cannot be used generally.
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Microforaminiferal linings as proxies for paleosalinity and pollution: Danube Delta example

Micropaleontology, 2019
Acid-resistant, chitin-like organic linings of foraminiferal tests in palynological assemblages are commonly considered reliable indicators of marine transgressions despite sparse information on the relationship between the organic and inorganic skeletal components.
Petra J. Mudie, Valentina Yanko-Hombach
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Boron paleosalinity proxy for deeply buried Paleozoic and Ediacaran fossils

Palaeogeography, Palaeoclimatology, Palaeoecology, 2020
Abstract Boron content is an indicator of paleosalinity for Mesozoic and Cenozoic clayey sediments, but is compromised by clay diagenesis in deeply-buried sediments of Paleozoic and Ediacaran age. This study of North American, Russian, and Australian, Paleozoic and Ediacaran fossils showed tight covariance of B (ppm) and K (wt%), confirming common ...
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Paleotemperature and paleosalinity history of the estern Mediterranean during the Late Quaternary

Palaeogeography, Palaeoclimatology, Palaeoecology, 1983
Abstract Faunal and isotopic studies of continuous deep-sea cores were used to determine the paleotemperature and paleosalinity history of the eastern Mediterranean for the last 500,000 years. Temperature-related changes in the planktonic foraminiferal assemblages appear to be synchronous with glacial/interglacial changes in the open ocean.
Robert C. Thunell, Douglas F. Williams
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Departure Curves for Computing Paleosalinity from Boron in Illites and Shales

AAPG Bulletin, 1963
ABSTRACT Natural illites contain a small amount of boron which probably substitutes for silicon in the illite lattice. The exact amount of boron taken into the structure is determined by the potassium content and grain size of the illite and the salinity at the time of deposition (paleosalinity). In illites of constant grain size from
Charles T. Walker, Norman B. Price
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Boron Concentration in Chesapeake Bay Sediments, Paleosalinity and Baymouth Uplift

Chesapeake Science, 1976
The clay-silt fraction of two cores from the entrance to the Chesapeake Bay was analyzed for boron concentration. Paleoecologic data are used to corroborate, qualitatively, the relationship between boron concentration and salinity. The results demonstrate that the boron concentration reflects a salinity trend that could accompany the Holocene emergence
D. J. Brooks, A. E. DeWall
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Paleosalinity and δ¹⁸O: A critical assessment

Journal of Geophysical Research: Oceans, 1998
In paleoceanography, a traditional application of oxygen isotope ratios in fossil carbonate from deep‐sea cores concerns the reconstruction of paleotemperatures. Recently, isotopic data have been increasingly employed in the reconstruction of paleosalinities as well. This application involves a number of basic assumptions, a critical review of which is
Eelco J. Rohling, Grant R. Bigg
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