Download PDF by Stephen J. Culver (Editor), Peter F. Rawson (Editor): Biotic Response to Global Change: The Last 145 Million Years

February 1, 2018 | Nonfiction 6 | By admin | 0 Comments

By Stephen J. Culver (Editor), Peter F. Rawson (Editor)

ISBN-10: 0521663040

ISBN-13: 9780521663045

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1982) noted that, by the Cenomanian, the opening of the South Atlantic and widening of the North Atlantic would have led to increased rainfall on the eastern coasts of North and South America. With further widening of the Atlantic, greater marine in¯uence should have resulted in more rainfall in western Europe. , 1996) that the abundance and high diversity of rudist bivalves in low-latitude Tethyan seas was a consequence of very high water temperatures which restricted coral growth but favoured that of rudists; this hypothetical zone was called `Supertethys'.

The oblique collision of the Iberian and European plates created the Pyrenees, and farther south the collision between the Iberian and African plates created the Betics. , 1993). Over about a 1 millionyear interval the regional climate became drier, and without an open marine seaway connecting the Mediterranean to other oceans it virtually dried up to become a desert, with brine pools associated with the widespread deposition of thick evaporites. About 5 million years ago the dam which separated the Mediterranean from the Atlantic Ocean was ®nally breached.

S . GALE Periods of increased organic burial during the mid Cretaceous (seen as both organic-rich mud shales and positive excursions in 13C) also coincided with increased rates of oceanic crust production. The organic burial events were perhaps initiated by sea-level rise leading to upwelling and massively increased productivity which was the direct cause of anoxia (Pedersen & Calvert, 1990). 2, formation of the large Ontong±Java Plateau coincides with the ®rst Aptian OAE. , 1994). The occurrence of organic-burial events can also be related to high temperature intervals, which reduced the pCO2 of seawater and made the system more prone to axoxia.

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Biotic Response to Global Change: The Last 145 Million Years by Stephen J. Culver (Editor), Peter F. Rawson (Editor)


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