Navigation Links
Microfossils disclose geologic history of eastern California
Date:10/4/2007

Boulder, CO, USA The Bird Spring Shelf in southeastern California and basins to the west reveal a complex history of late Paleozoic sedimentation, sea-level changes, and deformation along the western North American continental margin. A new book published by the Geological Society of America captures insights into the tectonics and paleogeography of the region.

The Pennsylvanian-Early Permian Bird Spring Carbonate Shelf, Southeastern California: Fusulinid Biostratigraphy, Paleogeographic Evolution, and Tectonic Implications focuses on evidence from ancient seas across a considerable expanse of geologic time.

"Detailed correlations between fusulinid-bearing rocks of the Bird Spring Shelf and deep-water deposits to the northwest reveal the complex history of the area," said author Calvin Stevens of San Jose State University in California. "They confirm the late Paleozoic as a time of major tectonic instability on the continental margin."

Fusulinids, single-celled marine organisms with multiple chambers composed of calcite, typically resemble grains of wheat. They inhabited the world's seas 315 to 250 million years ago and disappeared during the end-Permian mass extinction. Today they are important guide fossils in understanding Pennsylvanian and Permian rocks and systems.

Stevens and co-author Paul Stone, U.S. Geological Survey, Menlo Park, recognized 69 fusulinid species which subsequently formed the basis of their correlations. They utilized recent data from the same area on conodonts, another extinct marine creature, to place their work in the context of standard Permian timescales.

According to Stevens a number of the fusulinid species were described as new while others allow comparison with those from other regions. The resulting reconstructions provide a more complete picture of the geology of western North America during the late Paleozoic.


'/>"/>

Contact: Ann Cairns
acairns@geosociety.org
303-357-1056
Geological Society of America
Source:Eurekalert

Page: 1

Related biology news :

1. Microfossils unravel climate history of tropical Africa
2. New results validating Pall prion reduction filter disclosed at ISBT Congress
3. Divergent life history shapes gene expression in brains of salmon
4. Restaurant seafood prices since 1850s help plot marine harvests through history
5. Finding rewrites the evolutionary history of the origin of potatoes
6. Illinois pig to make history as source of first complete swine genome
7. History of human cannibalism eats away at researchers
8. History-hunting geneticists can still follow familiar trail
9. Coral stress like never in history
10. Ocean seep mollusks may share evolutionary history with other deep-sea creatures
11. Hotspots of mercury contamination identified in eastern North America
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2017)... MELBOURNE, Florida , April 17, 2017 ... security technology company, announces the filing of its 2016 Annual Report ... Securities and Exchange Commission. ... Report on Form 10-K is available in the Investor Relations section ... well as on the SEC,s website at http://www.sec.gov . ...
(Date:4/11/2017)... BROOKLYN, N.Y. , April 11, 2017 /PRNewswire-USNewswire/ ... identical fingerprints, but researchers at the New York ... University College of Engineering have found that partial ... fingerprint-based security systems used in mobile phones and ... previously thought. The vulnerability lies in ...
(Date:4/5/2017)... KEY FINDINGS The global market ... CAGR of 25.76% during the forecast period of 2017-2025. ... for the growth of the stem cell market. ... MARKET INSIGHTS The global stem cell market is segmented ... The stem cell market of the product is segmented ...
Breaking Biology News(10 mins):
(Date:7/17/2017)... ... 2017 , ... OHAUS Corporation, a leading worldwide manufacturer of ... line of Heavy-Duty Orbital Shakers today. , Eight New Models Available, OHAUS has ... These shakers are ideal for load capacities from 35 to 150 pounds, ...
(Date:7/17/2017)... ... July 17, 2017 , ... DuPont Pioneer today announced the ... (openinnovation.pioneer.com) dedicated to connecting third-party innovators with DuPont Pioneer scientists is now ... technologies, biologicals and digital solutions. , “DuPont Pioneer is building on its long ...
(Date:7/14/2017)... ... July 14, 2017 , ... Sonic Manufacturing Technologies ... Technologies has installed a solar system on its roof top. “We will be ... of Sonic, Kenneth Raab stated. The company’s proud history of social responsibility and ...
(Date:7/13/2017)... (PRWEB) , ... July 13, 2017 , ... Thousands of ... and August for the National Aeromodeling Championships (Nats). Pilots come to Muncie to compete ... to earn spots on US teams that participate in world championships. , RC Pylon ...
Breaking Biology Technology: