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:4/13/2017)... According to a new market research report "Consumer IAM Market ... Authorization), Service, Authentication Type, Deployment Mode, Vertical, and Region - Global Forecast ... from USD 14.30 Billion in 2017 to USD 31.75 Billion by 2022, ... ... MarketsandMarkets Logo ...
(Date:4/11/2017)... , April 11, 2017 No ... but researchers at the New York University Tandon ... of Engineering have found that partial similarities between ... systems used in mobile phones and other electronic ... The vulnerability lies in the fact ...
(Date:4/5/2017)... Allen Institute for Cell Science today announces the launch ... dynamic digital window into the human cell. The website ... deep learning to create predictive models of cell organization, ... suite of powerful tools. The Allen Cell Explorer will ... resources created and shared by the Allen Institute for ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... the Netherlands and LAGUNA HILLS, Calif. ... The Institute of Cancer Research, London ... use MMprofiler™ with SKY92, SkylineDx,s prognostic tool to risk-stratify patients ... trial known as MUK nine . The University of ... trial, which is partly funded by Myeloma UK, and ICR ...
(Date:10/10/2017)... Angeles, CA (PRWEB) , ... ... ... Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, ... uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life Sciences ... the life sciences and healthcare industries, announces a presentation by Subbu Viswanathan and ... presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach ...
(Date:10/9/2017)... ... October 09, 2017 , ... The ... medical marijuana products targeting the needs of consumers who are incorporating medical marijuana ... place in Phoenix, Arizona. , As operators of two successful Valley dispensaries, The ...
Breaking Biology Technology: