Featured Research

from universities, journals, and other organizations

Impact Events' Kinetic Energy May Be Key To Understanding The Severity Of Mass Extinctions

Date:
April 10, 2002
Source:
Geological Society Of America
Summary:
The kinetic energy created by asteroid and comet impacts with the Earth may be key to linking some impacts with mass extinction events. Michael Lucas, a geology student at Florida Gulf Coast University, believes that the severity of four extinction events during the Mesozoic and Cenozoic can be correlated with the total kinetic energy released by impacts that occur during the geologic age of the mass extinction.

The kinetic energy created by asteroid and comet impacts with the Earth may be key to linking some impacts with mass extinction events. Michael Lucas, a geology student at Florida Gulf Coast University, believes that the severity of four extinction events during the Mesozoic and Cenozoic can be correlated with the total kinetic energy released by impacts that occur during the geologic age of the mass extinction.

Lucas will present his findings April 4 at the Geological Society of America’s North-Central Section and Southeastern Section Joint Meeting in Lexington, Kentucky.

Lucas analyzed the kinetic energy released by 31 of the largest impact structures from the last 248 million years and correlated them with the Norian, Tithonian, Late Eocene, and K-T extinction events. The impact energy released during the geologic ages of each extinction event is at least 10 million megatons of TNT equivalent yield per geologic age. Lucas believes that this could represent a minimum impact energy required to cause a global-scale mass extinction. His research results also reveal that synchronous multiple impact events could also have caused extinctions.

“Approximately ten percent of the impact structures on Earth are doublets or twin structures, suggesting a nearly simultaneous impact of binary asteroids or fragmented comets,” he said. An example of a twin impact structure would be the Kara / Ust-Kara twin impact structure in Russia which is about 73 million years old.


Story Source:

The above story is based on materials provided by Geological Society Of America. Note: Materials may be edited for content and length.


Cite This Page:

Geological Society Of America. "Impact Events' Kinetic Energy May Be Key To Understanding The Severity Of Mass Extinctions." ScienceDaily. ScienceDaily, 10 April 2002. <www.sciencedaily.com/releases/2002/04/020409074322.htm>.
Geological Society Of America. (2002, April 10). Impact Events' Kinetic Energy May Be Key To Understanding The Severity Of Mass Extinctions. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2002/04/020409074322.htm
Geological Society Of America. "Impact Events' Kinetic Energy May Be Key To Understanding The Severity Of Mass Extinctions." ScienceDaily. www.sciencedaily.com/releases/2002/04/020409074322.htm (accessed July 22, 2014).

Share This




More Earth & Climate News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Orleans Plans to Recycle Cigarette Butts

New Orleans Plans to Recycle Cigarette Butts

AP (July 21, 2014) New Orleans is the first U.S. city to participate in a large-scale recycling effort for cigarette butts. The city is rolling out dozens of containers for smokers to use when they discard their butts. (July 21) Video provided by AP
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
Spectacular Lightning Storm Hits London

Spectacular Lightning Storm Hits London

AFP (July 19, 2014) A spectaCular lightning storm struck the UK overnight Friday. Images of lightning strikes over the Shard and Tower Bridge in central London. Duration: 00:23 Video provided by AFP
Powered by NewsLook.com
A Centuries' Old British Tradition Is Far from a Swan Song

A Centuries' Old British Tradition Is Far from a Swan Song

AFP (July 19, 2014) As if it weren't enough that the Queen is the Sovereign of the UK and 15 other Commonwealth realms, she is also the owner of all Britain's unmarked swans. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins