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:4/23/2014)... is a newly coined term for novels and films which ... University of Copenhagen shows how these fictions serve as a ... of climate change and imagine other living conditions. , ... in the atmosphere; it is also a cultural phenomenon in ... and the films we see. And there are so many ...
(Date:4/23/2014)... disease is the first cause of dementia and affects ... cure has yet been found. One of the reasons ... cellular mechanisms which cause alterations in nerve transmissions and ... the disease., Researchers from the Institute of Neuroscience at ... mechanism involved in memory consolidation and were able to ...
(Date:4/23/2014)... social mammals, ravens form different types of social relationships ... they also form strict dominance relations. From a cognitive ... key ability in daily social life ("knowing who is ... members have with each other sets the stage for ... of this study have been published in the scientific ...
Breaking Biology News(10 mins):Fiction prepares us for a world changed by global warming 2Fiction prepares us for a world changed by global warming 3Loss of memory in Alzheimer's mice models reversed through gene therapy 2Ravens understand the relations among others 2
... sleuthing system they developed to probe how cells manage ... common but hard-to-see sugar switches are partly in control. ... abundant and potential targets of manipulation by drugs, the ... for a number of diseases, including cancer, the scientists ...
... , REDWOOD CITY, Calif. , ... has selected DigitalPersona, Inc., a leader in fingerprint identity and ... Justice Information System (CJIS) mandates. Located in Central Florida , ... who serve more than 28,000 residents. The City chose DigitalPersona ® ...
... 2010 The Translational Genomics Research Institute (TGen) today ... agreement with the Van Andel Research Institute (VARI) that ... TGen expects the agreement to create a ... and treatments for patient benefit. ...
Cached Biology News:Sweet! -- sugar plays key role in cell division 2City of Winter Park Looks to DigitalPersona Software for Stronger Security and CJIS Compliance 2City of Winter Park Looks to DigitalPersona Software for Stronger Security and CJIS Compliance 3City of Winter Park Looks to DigitalPersona Software for Stronger Security and CJIS Compliance 4TGen finalizes alliance with Van Andel Research Institute 2TGen finalizes alliance with Van Andel Research Institute 3
(Date:1/15/2014)... 15, 2014 TaiGen Biotechnology Company, Limited ("TaiGen") today ... R-Pharm, a leading Russian pharmaceutical company, to develop and ... Russian Federation , Turkey ... is a novel antibiotic for the treatment of bacterial ...
(Date:1/14/2014)... Washington, DC (PRWEB) January 14, 2014 ... session for Thursday, January 23, 2014 at 2pm EST ... Actionable Knowledge.” The topic focuses on how technology can ... mission critical decisions for government agencies. The online webinar ...
(Date:1/14/2014)... 14, 2014  3D Communications, a leading provider of strategic communications services ... media events in the United States and ... Virginia Cox , JD, is returning to the firm,s ... re-joins 3D after more than two years of service as Associate ...
(Date:1/14/2014)... York, NY (PRWEB) January 14, 2014 ... of Alliqua, Inc. (OTCQB: ALQA). Alliqua is an emerging ... to serve the wound care market. , Free report ... was restructured with a seasoned management team and Board, ...
Breaking Biology Technology:TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2Former FDA Associate Commissioner Returns To 3D Communications 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... Copper,s days are numbered, and a new study ... the ubiquitous metal in smart phones, tablet computers, and ... who are seeking smaller, faster devices. As ... size, so do the copper pathways that transport electricity ...
... Interleukin Genetics, Inc. (OTCQB: ILIU) today announced financial and ... Total revenue for the three months ended September ... period in the prior year. The increase was attributable to ... expenses were $325,000 for the three months ended September 30, ...
... Nov. 10, 2011 GeoVax Labs, Inc. (OTCQB/OTCBB: GOVX), ... prevent and fight Human Immunodeficiency Virus (HIV) infections, today ... September 30, 2011. GeoVax reported a net ... months ended September 30, 2011, compared to $644,666 ($0.04 ...
Cached Biology Technology:Researching graphene nanoelectronics for a post-silicon world 2Researching graphene nanoelectronics for a post-silicon world 3Interleukin Genetics Reports Third Quarter 2011 Financial Results 2Interleukin Genetics Reports Third Quarter 2011 Financial Results 3Interleukin Genetics Reports Third Quarter 2011 Financial Results 4GeoVax Labs, Inc. Announces Nine Month 2011 Financial Results 2GeoVax Labs, Inc. Announces Nine Month 2011 Financial Results 3GeoVax Labs, Inc. Announces Nine Month 2011 Financial Results 4GeoVax Labs, Inc. Announces Nine Month 2011 Financial Results 5
... a variety of motion options - roller, ... unit. Shake, rock, roll and rotate motions!,, ... hybridization and blotting procedures requiring different settings, ... chamber uses a roller action to operate ...
... Magnetic Stand-96 is designed for paramagnetic bead ... 0.2 ml PCR plates with no additional ... base in a standard SBS 96-well microplate ... permanent magnets guarantees easy and fast (as ...
... magnetic particle based purification systems provide high ... any sample. They offer increased throughput and ... systems- KingFisher, KingFisher mL and KingFisher 96, ... l. Each system consists of an instrument, ...
... no-frills, basic SpeedVac concentrator designed for the ... unit still features a standard Teflon coated ... time and heat. It is designed for ... wide variety of different rotors for maximum ...
Biology Products: