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Paleozoic 'Sediment Curve' Provides New Tool For Tracking Sea-floor Sediment Movements

Date:
October 13, 2008
Source:
National Science Foundation
Summary:
As the world looks for more energy, the oil industry will need more refined tools for discoveries in places where searches have never before taken place, geologists say. A new tool follows sea-level rise and fall between 542 and 251 million years ago.

Ancient sediments like these in Brittany, France, help reconstruct Paleozoic sea-level history.
Credit: Bil Haq, NSF

As the world looks for more energy, the oil industry will need more refined tools for discoveries in places where searches have never before taken place, geologists say.

One such tool is a new sediment curve (which shows where sediment-on-the-move is deposited), derived from sediments of the Paleozoic Era 542 to 251 million years ago, scientists report in this week's issue of the journal Science. The sediment curve covers the entire Paleozoic Era.

"The new Paleozoic sea-level sediment curve provides a way of deriving predictive models of sediment migration on continental margins and in interior seaways," said Bilal Haq, lead author of the Science paper and a marine geologist at the National Science Foundation (NSF). The paper's co-author is geologist Stephen Schutter of Murphy Oil International in Houston, Tx.

"The sediment curve is of interest to industry, and also to scientists in academia," said Haq, "as the rise and fall of sea-level form the basis for intepretations of Earth history based on stratigraphy."

Through stratigraphy, the study of rock layering (stratification), scientists can derive a sequence of time and events in a particular region. Recent advances in the field of stratigraphy, including better time-scales for when sediments were deposited, and availability of data on a worldwide basis, are allowing scientists to reconstruct sea level during the Paleozoic.

The rises and falls of sea level during this period form the basis of stratigraphic interpretations of geology not only in the sea, but on land. These sea level increases and decreases are used extensively, Haq said, in predictive models of sediment movements.

The current Science paper is a shorter version of the results of a global synthesis of Paleozoic stratigraphy on which the authors have worked for many years.

"We hope that the publication of a sediment curve for this entire era will enhance interest in Paleozoic geology," said Haq, "and help the exploration industry in its efforts to look at older and deeper sediments."


Story Source:

The above story is based on materials provided by National Science Foundation. Note: Materials may be edited for content and length.


Cite This Page:

National Science Foundation. "Paleozoic 'Sediment Curve' Provides New Tool For Tracking Sea-floor Sediment Movements." ScienceDaily. ScienceDaily, 13 October 2008. <www.sciencedaily.com/releases/2008/10/081002172538.htm>.
National Science Foundation. (2008, October 13). Paleozoic 'Sediment Curve' Provides New Tool For Tracking Sea-floor Sediment Movements. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2008/10/081002172538.htm
National Science Foundation. "Paleozoic 'Sediment Curve' Provides New Tool For Tracking Sea-floor Sediment Movements." ScienceDaily. www.sciencedaily.com/releases/2008/10/081002172538.htm (accessed April 18, 2014).

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