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:3/24/2017)... Research and Markets has announced the addition ... Trends - Industry Forecast to 2025" report to their offering. ... The Global Biometric ... of around 15.1% over the next decade to reach approximately $1,580 ... market estimates and forecasts for all the given segments on global ...
(Date:3/22/2017)... Calif. , March 21, 2017 ... analytics company serving law enforcement agencies, announced today the ... as director of public safety business development. ... diversified law enforcement experience, including a focus on the ... In his most recent position, Mr. Sheridan served as ...
(Date:3/9/2017)... MELBOURNE , Australia , March ... clinical study data at the prestigious World Lung Imaging ... Dr. Andreas Fouras , was invited to deliver ... and pulmonary medicine. This globally recognised event brings together ... and share the latest developments in lung imaging. ...
Breaking Biology News(10 mins):
(Date:3/27/2017)... 2017 Cousins Properties (NYSE: CUZ ) ... companies, has signed a 10-year, approximately 125,000 square-foot lease at ... located in the Westshore submarket of Tampa, FL. ... has chosen Corporate Center for their new location in ... and chief executive officer of Cousins Properties. "Amgen is a ...
(Date:3/27/2017)... March 27, 2017  Perthera,s Chief Bioinformatics Officer and ... Subha Madhavan , Ph.D., will be speaking at the ... On Monday, March 27, 2017, she will be speaking ... Usable for Research and Care" (from 10:30 a.m. – ... she will be a participant in the "Making Precision ...
(Date:3/27/2017)... March 27, 2017  Trovagene, Inc. (NASDAQ: TROV), a ... Executive Officer, Bill Welch , will be presenting ... at 9:00 AM EDT at the Essex House in ... and Chief Scientific Officer, Mark Erlander , Ph.D., ... the conference.   The presentation will be webcast ...
(Date:3/24/2017)... ROCKVILLE, Md. , March 24, 2017  Infectex ... Fund (MBVF), today announced positive results of a Phase ... drug therapy regimen in patients with multidrug-resistant pulmonary tuberculosis ... by scientists at Sequella, Inc. ( USA ... A total of 140 patients were enrolled ...
Breaking Biology Technology: