Navigation Links
Fossil bone bed helps reconstruct life along California's ancient coastline
Date:6/8/2009

ears ago, the climate was warming, sea level was at a peak, California's Central Valley was an inland sea dubbed the Temblor Sea and the emerging Sierra Nevada was shoreline. By closely studying the geology of the Sharktooth Hill area, the paleontologists determined that it was part of an underwater shelf in a large embayment, directly opposite a wide opening to the sea.

Pyenson and Irmis examined some 3,000 fossilized bone and teeth specimens in the collections of many museums, including the NHM and UCMP, and they and Lipps also cut out a meter-square section of the bone bed, complete with the rock layers above and below, and transported it to UC Berkeley for study.

Below the bone bed, they found several feet of mudstone interlaced with shrimp burrows, typical of ocean floor sediment several hundred to several thousand feet below the surface. The bone bed itself averaged 200 bones per square meter, most of them larger bones, with almost no sediment. Most were disarticulated, as if the animal carcasses had decayed and their bones had been scattered by currents.

"The bones look a bit rotten," Lipps said, "as if they lay on the seafloor for a long time and were abraded by water with sand in it." Many bones had manganese nodules and growths, which form on bones that sit for long periods in sea water before being covered by sediment.

Toward the top of the bone bed, some articulated skeletons of seals and whales were found, while in the layer above the bone bed, most skeletons were articulated and encased in sediment.

The team's conclusion is that the climatic conditions were such that currents carried sediment around the bone beds for 100,000 to 700,000 years, during which time bones remained exposed on the ocean floor and accumulated in a big and shifting pile.

Given the rarity of bones marked by shark bites, plus the occurrence of terrestrial animals such as tapirs and horses that must have washed out to sea, pred
'/>"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. First orchid fossil puts showy blooms at some 80 million years old
2. Fossil data plugs gaps in current knowledge, study shows
3. Microfossils disclose geologic history of eastern California
4. Living fossils have hot sex
5. Fossilized cashew nuts reveal Europe was important route between Africa and South America
6. Fossil record supports evidence of impending mass extinction
7. Fossil record reveals elusive jellyfish more than 500 million years old
8. Can plant-based ethanol save us from our fossil fuel addiction?
9. 390-million-year-old scorpion fossil -- biggest bug known
10. Rodent fossils allows to determine climate of the Iberian Peninsula 6 million years ago
11. Fossils excavated from Bahamian blue hole may give clues of early life
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fossil bone bed helps reconstruct life along California's ancient coastline
(Date:1/22/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/wxdglm/global_wearable ... "Global Wearable Technologies Market and Applications, Opportunities, Industry ... Forecast 2014-2020" report to their offering. ... that can be worn on the user,s body ...
(Date:12/22/2014)... , Dec. 22, 2014  NXT-ID, Inc. (NASDAQ: NXTD ... company focused on the growing mobile commerce market, announces it ... Robbins for the 2015 International CES debut of the ... will be at the NXT-ID booth January 6th and ...
(Date:12/19/2014)... 18, 2014 Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) ... North America Perimeter Security Systems Market" report to their ... The North American perimeter security market is estimated to grow ... the U.S. market holds a larger share in this market, ...
Breaking Biology News(10 mins):Global Wearable Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, Size, Growth, Share, Overview, Trends and Forecast 2014-2020 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3
... Scientists at the MUHC have made an important discovery ... hormone estrogen causes growth of breast cancer cells. The ... Recherches Cliniques de Montreal (IRCM) identifies 153 genes that ... be used to halt the growth of breast cancer ...
... one-third and one-half of our planet's land surfaces ... a new study is offering insight into the ... of large-scale deforestation in tropical regions on the ... analyzed multiple years of data using the NASA ...
... first structural details of a family of mysterious objects ... variety of bacteria. The discovery was published Aug. 5 ... look at how microcompartments are built, and what the ... of chemistry and biochemistry, and a member of the ...
Cached Biology News:Scientists discover genetic pathway responsible for breast cancer cell growth 2Tropical Deforestation affects rainfall in the U.S. and around the globe 2Tropical Deforestation affects rainfall in the U.S. and around the globe 3Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss 2Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss 3
(Date:1/22/2015)... NJ (PRWEB) January 22, 2015 ... technologies such as the Bioruptor® and complete solutions ... system for chromatin immunoprecipitation, alleviating the need for ... and controls needed for ChIP of histones or ...
(Date:1/22/2015)... ALTO, Calif. , Jan. 22. 2015  Varian Medical Systems ... and software, has been honored for its commitment to sustainability ... sustainable companies. Varian is the highest ranked healthcare equipment company ... announced today during the World Economic Forum at ...
(Date:12/25/2014)... The report “Service Quality Management and Telco Customer Experience ... Global Advancements, Worldwide Forecasts & Analysis (2014-2019)” defines and ... of revenues. , Browse 152 market data tables, ... on “Service Quality Management (SQM) and Telco Customer Experience ...
(Date:12/24/2014)...  Vermillion, Inc. (Nasdaq:   VRML), a bio-analytical solutions ... the Company closed its previously announced private placement ... W. Schuler , Birchview Fund LLC and several ... offering expenses.  The proceeds will be used for ...
Breaking Biology Technology:Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2Varian Honored Among World's 100 Most Sustainable Corporations 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 3Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 4Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3
... Pharmaceuticals, Inc. (Nasdaq: PPHM ) today announced that ... $10 million in proceeds. The initial funding of $5 ... The loan agreement includes an option to acquire a ... of certain conditions . MidCap Financial LLC and ...
... quickly and effectively use this invaluable resource. , ... ... announced the availability of a new tutorial suite on the Comprehensive ... the analysis of prokaryotes, including the complete sequences of all publicly ...
... computing power could be sustained for many years to ... National Physical Laboratory (NPL) that is applying advanced techniques ... density of transistors on an integrated circuit doubles every ... this, but experts believed that when the characteristic transistor ...
Cached Biology Technology:Peregrine Pharmaceuticals Enters Into a Loan Agreement for up to $10 Million 2Peregrine Pharmaceuticals Enters Into a Loan Agreement for up to $10 Million 3Peregrine Pharmaceuticals Enters Into a Loan Agreement for up to $10 Million 4New Online Tutorial for the Comprehensive Microbial Resource (CMR) 2
Plasmid expressing the LacZ reporter gene....
Human SEAP ORF, provided in a pORF plasmid. pORF is an expression plasmid selectable with Ampicillin....
... PYREX Fernbach-style culture flasks have triple baffles ... bottom to achieve maximal oxygen transfer to ... marking spot., A wide range of optional ... Polypropylene colored caps for ease of ...
... 400g of purified RNA samples., , This ... of aqueous RNA samples that have been ... phenol/chloroform, silica, oligo dT etc or other ... the necessary components for the stabilization of ...
Biology Products: