HOME >> BIOLOGY >> NEWS
Oldest crystal reveals early Earth

Curtin University of Technology in Perth, Western Australia.

Valley worked with William H. Peck, a former UW-Madison graduate student and now an assistant professor of geology at Colgate University, to analyze oxygen isotope ratios, measure rare earth elements, and determine element composition in a grain of zircon that measured little more than the diameter of two human hairs.

Peck, lead author of the Geochimica paper, conducted the work as part of his doctoral thesis at UW-Madison. Colin M. Graham's laboratory analyzed the zircon to obtain the oxygen isotope ratios. Graham is a contributor to the paper and professor of geochemistry at the University of Edinburgh.

"What the oxygen isotopes and rare earth analysis show us is a high oxygen isotope ratio that is not common in other such minerals from the first half of the Earth's history," Peck says. In other words, the chemistry of the mineral and the rock in which it developed could only have formed from material in a low-temperature environment at Earth's surface.

The accepted view on an infant Earth is that shortly after it first formed 4.5 to 4.6 billion years ago, the planet became little more than a swirling ball of molten metal and rock. Scientists believed it took a long time, perhaps 700 million years, for the Earth to cool to the point that oceans could condense from a thick, Venus-like atmosphere.

Complicating the picture is that for 500 million to 600 million years after the Earth was formed, the young planet was pummeled by intense meteorite bombardment. About 4.45 billion years ago, a Mars-size object is believed to have slammed into the Earth, creating the moon by blasting pieces of the infant planet into space.

"This is the first evidence of crust as old as 4.4 billion years, and indicates the development of continental-type crust during intense meteorite bombardment of the early Earth," Valley says. "It is possible that the water-rock interaction (as represented in the ancient
'"/>

Contact: John Valley
valley@geology.wisc.edu
608-263-5659
University of Wisconsin-Madison
10-Jan-2001


Page: 1 2 3

Related biology news :

1. Oldest evidence for processing of wild cereals: starch grains from barley, wheat, on grinding stone
2. Oldest known evidence of cat taming found in Cyprus, researchers report in Science
3. Oldest-known arm bone found in Pennsylvania
4. Earlier water on Earth? Oldest rock suggests hospitable young planet
5. Flatworms Are Oldest Living Ancestors To Those Of Us With Right And Left Sides, Reported In The 19 March Issue Of Science
6. Oldest Ice Core From The Tropics Recovered, New Ice Age Evidence
7. Chinese And US Scientists Identify The Worlds Oldest Flowering Plant
8. Worlds Oldest Known Fossil Reptile Nests Discovered In Arizonas Petrified Forest
9. American Museum Of Natural History Researchers Announce Discovery Of Oldest Known Fossil Ants - 92-Million-Year-Old Fossils Found In New Jersey Amber
10. Microbes trick provides a template for willowy crystals
11. New X-ray sources speed protein crystallography

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/22/2020)... (PRWEB) , ... January 21, 2020 , ... ... Pozil to lead the company’s new Business Development Department. The move, which is ... Pozil had been previously serving as the company’s Senior Vice President where he ...
(Date:1/10/2020)... , ... January 09, 2020 , ... ... bioactive spinal solutions, today announced the 510(K) clearance and commercial launch of the ... interbody fusion system. , The EVOL®ha-DLIF is made of PEEK-OPTIMA HA Enhanced ...
(Date:1/7/2020)... ... January 06, 2020 , ... Myant Inc. , the ... Las Vegas) to bring to life its vision of a world where textile-based interfaces ... community, the AI-powered digital sphere, and the physical IoT-enabled environment. The experience at Myant’s ...
Breaking Biology News(10 mins):
(Date:1/28/2020)... ... January 28, 2020 , ... Lifecycle Biotechnologies announced ... beverage manufactures within North America. Both Lifecycle and Midland have supported this industry ... company to pool their collective resources and provide the industry with support, service, ...
(Date:1/24/2020)... ... , ... The plastic and reconstructive surgeons at The Institute for Advanced ... that plastic surgery is much more than just cosmetic surgery and far more extensive ... 20 years NJ Top Docs, Dr. Andrew Elkwood, Dr. Michael Rose, Dr. Matthew Kaufman, ...
(Date:1/22/2020)... (PRWEB) , ... January 21, 2020 , ... ... hiring of Darrell Taylor as Southern Midwest Region Industrial and Institutional (I&I) Account ... SporActiv™ product line. , Darrell brings over 30 years of sales ...
(Date:1/10/2020)... PISCATAWAY, N.J. (PRWEB) , ... January 09, 2020 ... ... companies in China, today announced its inaugural GenScript Biotech Global Forum on Jan. ... Forum, exploring the theme "Cell and Gene Therapy and the Booming China Market," ...
Breaking Biology Technology:
Cached News: