Featured Research

from universities, journals, and other organizations

Geologist Looks At Mystery Of Ancient Sea: Did The Iapetus Ocean Ever Exist?

Date:
October 23, 1997
Source:
University Of Cincinnati
Summary:
Most people have heard about the mythical lost continent of Atlantis, but University of Cincinnati geologist Warren Huff is more interested in the disappearance of the ancient Iapetus Ocean, an ocean some believe may never have existed at all.

Cincinnati -- Most people have heard about the mythical lost continent of Atlantis, but University of Cincinnati geologist Warren Huff is more interested in the disappearance of the ancient Iapetus Ocean, an ocean some believe may never have existed at all.

Related Articles


During a presentation Wednesday, Oct. 22 at the annual meeting of the Geological Society of America in Salt Lake City, Huff will present evidence from ancient volcanic ash beds which he believes demonstrates a narrow Iapetus Ocean did exist during the Ordovician but closed off and disappeared by the Silurian 420 million years ago.

"If you look at the younger beds 420 million years ago there is no more Iapetus Ocean," said Huff. "The question is whether there ever was one."

The best way to determine whether the ocean existed is to look at the land masses which would have surrounded it. If large land masses were locked together, there would have been no room for an Iapetus Ocean to exist. If they were spread farther apart, the ocean would have filled the gap between ancient continents.

There are three basic tools geologists have to determine how the ancient continents were spread out over the globe: paleo- magnetic data, the fossil record, and the ash beds left by massive, explosive volcanism.

Paleo-magnetic data is difficult to interpret during the time period in question. The fossil record indicates strong similarities between what is now Texas and the southern Applachians and a portion of Argentina known as the Precordillera. Those similarities have led some geologists to argue that ancient North and South America were smashed together side by side. That would leave no room for the Iapetus Ocean.

Huff and his collaborators have examined dozens of ancient volcanic ash beds, including 30 in the Argentine Precordillera. They find no similarities between ash beds in North and South America.

"If two land masses were adjacent, the volcanoes should leave their mark on both continents," explained Huff. You ought to be able to find those ash beds and match them up. The problem is, when we go looking for volcanic ash beds down there of the same age as in the Appalachians, we don't find them."

So, did the Iapetus Ocean exist? Huff says yes. "Based on our data, it was roughly 1,000 kilometers wide..about 600 miles."

More important, Huff finds no evidence that North and South America were ever side by side. He explains the fossil similarities, using evidence collected by UC geology graduate student Maria Prokopenko. The evidence indicates part of North America broke away and eventually reassembled as part of South America. The fossils weren't formed in South America. They were carried there.

"Maria is showing something rather interesting which we didn't know before. The volcanoes change their compositions during the time in which a whole series of these ash beds were being formed. That indicates the continent was shifting positions at the time."

Huff believes the process is very similar to the modern day South Pacific where volcanic islands like Borneo and Sumatra are being driven toward Asia by plate tectonics.

Huff's collaborators include Dennis Kolata of the Illinois State Geological Survey, Stig Bergstrom of Ohio State University and Argentine geologists Carlos Cingolani and Ricardo Astini.


Story Source:

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


Cite This Page:

University Of Cincinnati. "Geologist Looks At Mystery Of Ancient Sea: Did The Iapetus Ocean Ever Exist?." ScienceDaily. ScienceDaily, 23 October 1997. <www.sciencedaily.com/releases/1997/10/971023070233.htm>.
University Of Cincinnati. (1997, October 23). Geologist Looks At Mystery Of Ancient Sea: Did The Iapetus Ocean Ever Exist?. ScienceDaily. Retrieved March 29, 2015 from www.sciencedaily.com/releases/1997/10/971023070233.htm
University Of Cincinnati. "Geologist Looks At Mystery Of Ancient Sea: Did The Iapetus Ocean Ever Exist?." ScienceDaily. www.sciencedaily.com/releases/1997/10/971023070233.htm (accessed March 29, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Sunday, March 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Vietnam Rice Boom Piles Pressure on Farmers and the Environment

Vietnam Rice Boom Piles Pressure on Farmers and the Environment

AFP (Mar. 29, 2015) — Vietnam&apos;s drive to become the world&apos;s leading rice exporter is pushing farmers in the fertile Mekong Delta to the brink, say experts, with mounting costs to the environment. Duration: 02:35 Video provided by AFP
Powered by NewsLook.com
Raw: New Eruptions at Colima Volcano in Mexico

Raw: New Eruptions at Colima Volcano in Mexico

AP (Mar. 28, 2015) — The Colima Volcano in western Mexico sent large columns of ash up into the air on Saturday. (March 28) Video provided by AP
Powered by NewsLook.com
Antarctic Ice Is Melting Faster Than Ever

Antarctic Ice Is Melting Faster Than Ever

Newsy (Mar. 27, 2015) — A new study of nearly two decades of satellite data shows Antarctic ice shelves are losing more mass faster every year. Video provided by Newsy
Powered by NewsLook.com
Raw: Homes Near Landslide in Washington

Raw: Homes Near Landslide in Washington

AP (Mar. 27, 2015) — Aerial footage from KOMO shows several homes near a landslide in Washington. KOMO reports that at least one of the homes has been damaged. (March 27) Video provided by AP
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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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