Fossils Show British Columbia Was Once 2,000 Miles South

Small sea creatures that have lain in pristine condition for eons have given a University of Washington researcher the clearest evidence yet that about 80 million years ago a southern landmass began migrating to the north. And what today is rainy British Columbia and chilly southern Alaska were once the sunny climes of Baja California.

For years scientists have been arguing about the theory of the wandering West, and whether it would have been possible for plate tectonics to have moved massive chunks of the Earth's crust northward along a gigantic faultline. Now UW paleontologist Peter Ward and his collaborators report in tomorrow's Science magazine that the discovery of pearly fossil shells of an extinct mollusk on two islands off the eastern coast of Vancouver Island give clear evidence that the region was once nearly 2,000 miles to the south.

"Everything that we now recognize as coastal British Columbia was once off the coast of what is now Mexico or Southern California. It was nowhere near its present latitude," says Ward.

Ward's study was aimed at proving that traces of magnetism in rocks on the British Columbia coast were the actual relic of the Earth's ancient magnetic field. As the layered, or sedimentary, rocks were deposited under the sea, mineral crystals became magnetized, freezing the magnetic field. If the rocks had been formed at the equator, the direction of the magnetism in the formation would have been horizontal. At the poles, it would have been vertical. Thus if rocks in British Columbia show a magnetic field slightly tilted from the horizontal, the implication is they were formed far to the south.

But there is a catch. As the Earth's crust is heated, particularly by volcanic upheavals, the mineral crystals in the rocks can become remagnetized, leaving no trace of the earlier, ancient magnetic field. So those British Columbia rocks may not have moved

Contact: David Brand
(206) 543-2580
University of Washington

Page: 1 2 3

Related biology news :

1. Fossils reveal direct link between global warming and genetic diversity in wildlife
2. Methane and mini-horses: Fossils reveal effects of global warming
3. Discovery Of New Fossils In Gobi Desert Of Mongolia Provides Important Insight Into Early Mammal Evolution
4. Molecular "Fossils" Of Early Life
5. American Museum Of Natural History Researchers Announce Discovery Of Oldest Known Fossil Ants - 92-Million-Year-Old Fossils Found In New Jersey Amber
6. Where Fossils Fear To Tread: Scientists Follow Genes To An Ancient Ancestor
7. British scientists exclude maverick colleagues, says report
8. Hebrew University, German and British researchers develop means to help stress sufferers
9. British Antarctic Survey wins environment award
10. ESA Corporate Award winner 2001: Weyerhaeuser Company Limited British Columbia Coastal Forest Project Team
11. BioMed Central to deposit e-journals with the British Library

Post Your Comments:

(Date:8/5/2020)... ... , ... Regenative Labs has received approval from the Centers for Medicare & ... first Wharton’s jelly allografts to be assigned a Q code and be approved for ... Wharton’s jelly allograft product to be recognized as a 361 HCT/P by CMS regulated ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/2/2020)... ... July 01, 2020 , ... AltruBio Inc. http://www.altrubio.com ... a biologic for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGVHD), at European ... J Martin of the Fred Hutchinson Cancer Research Center, this single-arm, open-label Phase ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... FARMS, Mich. (PRWEB) , ... August 12, 2020 ... ... Consulting Group, Inc. (EMMA International), a global leader in FDA compliance consulting ... of the nation’s fastest-growing private companies. The list represents a unique look at ...
(Date:8/3/2020)... (PRWEB) , ... August 03, 2020 , ... ... collection, today announced Jim Corrigan, President and CEO has been named one of ... broad cross-section of industry sectors, PharmaVoice 100 honorees are selected based on how ...
(Date:7/31/2020)... ... July 29, 2020 , ... R3 Stem Cell International is ... $3950. With 50 million stem cells total, patients may choose which extremities they would ... for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, umbilical cord tissue is ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. ... drive one or two switches in a push-pull configuration; yielding fast fall time ...
Breaking Biology Technology:
Cached News: