HOME >> BIOLOGY >> NEWS
Cosmic impacts implicated in both the rise and fall of dinosaurs

NEW BRUNSWICK/PISCATAWAY, N.J. New abilities to detect layers of "space dust" in the earth's crust are building geological evidence that comets or asteroids colliding with earth not only helped wipe out the dinosaurs, but may have originally helped bring them to prominence about 200 million years ago.

Dennis V. Kent, Rutgers geology professor, was among a team of geologists who analyzed footprints, bones and plant spores in more than 70 locations in eastern North America, as well as iridium dust and magnetic fields in four corresponding sediment layers in the Newark Basin. The team published its findings, "Ascent of Dinosaurs Linked to an Iridium Anomaly at the Triassic-Jurassic Boundary," in the May 17 edition of the journal Science.

"Finding the element iridium, which is common in space objects, creates a time marker for comet or asteroid impacts." said Kent. "Correlating the finds with evidence of plant and animal life helps to tell us what happened."

Using high-resolution mass spectrometry technology provided by Christian Koeberl of the University of Vienna in Austria, the scientists were able to make unprecedented comparisons of iridium levels in the parts-per-trillion range. Earlier attempts to find an iridium "spike" at the boundary between the Triassic and Jurassic periods had been hampered because the spectrometry equipment, which identifies materials by comparing their mass, was not sensitive enough.

Kent said another important find was a thin zone in the sediment, just below the Triassic-Jurassic boundary, where the magnetic field is reversed. This reverse zone can now serve as a marker to help identify the boundary location in the geological record.

"Our research adds to the speculation that there was a comet or asteroid impact about 200 million years ago, followed relatively quickly by the rising dominance of dinosaur populations of the Jurassic period," said Kent. He suggested that the effects of the impac
'"/>

Contact: Bill Haduch
bhaduch@ur.rutgers.edu
732-932-7084
Rutgers, the State University of New Jersey
16-May-2002


Page: 1 2

Related biology news :

1. Conservation International & SC Johnson invest in Ecuadors rainforest to offset climate impacts
2. Exxon Valdez oil spill impacts lasting far longer than expected, scientists say
3. Lewis and Clark notes reveal history of human impacts
4. Media advisory - wildland fire impacts on watersheds
5. All species are not created equal when assessing the impacts of species loss on ecosystems
6. CAST releases report on environmental impacts of grazing systems on our nations resources
7. Marylands proposed crab regulations could have large economic impacts
8. Virginia Tech leads global effort to sort out social, economic impacts of agricultural biotechnology
9. "Soft" science? Fats health impacts are often oversimplified, Science news feature contends
10. MIT tool impacts multi-billion dollar drug
11. Smog impacts: Hurtling through airways, tiny particles may do more damage than previously assumed

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


(Date:5/8/2019)... ... May 07, 2019 , ... ... accepted into Forbes Technology Council, an invitation-only community for world-class CIOs, CTOs, ... a full-service biopharmaceutical cold chain engineering firm that guarantees confidence in a ...
(Date:5/7/2019)... ... 2019 , ... Landsec and Spartan Bioscience today announced they ... In May, Landsec will undertake trials using Spartan’s innovative Legionella test. Spartan’s test ... corrective action within hours instead of weeks. This test, if approved, could ...
(Date:5/2/2019)... ... 01, 2019 , ... uBiome, the leader in microbial genomics, ... General Counsel, as Interim Chief Executive Officer of uBiome, effective immediately. The Company’s ... There will also be an independent investigation into uBiome’s billing practices to be ...
Breaking Biology News(10 mins):
(Date:4/15/2019)... LOVELAND, Ohio (PRWEB) , ... April 15, 2019 ... ... and oligomers, has completed construction of a $2 million bench plant expansion to ... represents an important step in the design and construction of Sirrus’ full-scale production ...
(Date:4/10/2019)... ... April 10, 2019 , ... After more than three months of ... kitchen is equipped with updated appliances and modern lighting and fixtures, and will provide ... , “We’ve seen tremendous growth in the demand for our team-building events and ...
(Date:4/9/2019)... ... 2019 , ... The American Society of Gene & Cell Therapy (ASGCT) ... a new addition to the presidential line of succession, at the 22nd Annual ... leadership team for a three-year term (2019-2021). , All five incoming members of the ...
(Date:4/8/2019)... Zealand (PRWEB) , ... April 09, 2019 , ... ... infectious disease, the innovative non-profit research center Chan Zuckerberg Biohub (CZ Biohub) has ... study of antibody repertoires is part of CZ Biohub’s efforts to establish new ...
Breaking Biology Technology:
Cached News: