Featured Research

from universities, journals, and other organizations

Mars May Be Much Older -- Or Younger -- Than Thought, According To UB Planetary Geologist

Date:
January 24, 2003
Source:
University At Buffalo
Summary:
Research by a University at Buffalo planetary geologist suggests that generally accepted estimates about the geologic age of surfaces on Mars -- which influence theories about its history and whether or not it once sustained life -- could be way off. Funded by the National Aeronautics and Space Administration, the research eventually could overturn principles about the relative ages of different areas on the Red Planet that have not been questioned for nearly 20 years.

BUFFALO, N.Y. -- Research by a University at Buffalo planetary geologist suggests that generally accepted estimates about the geologic age of surfaces on Mars -- which influence theories about its history and whether or not it once sustained life -- could be way off. Funded by the National Aeronautics and Space Administration, the research eventually could overturn principles about the relative ages of different areas on the Red Planet that have not been questioned for nearly 20 years.

The findings also could cause scientists to reconsider the use of a critical tool -- counting impact craters created by meterorites -- that geologists use to estimate the age of planets they cannot visit in person.

"This has the potential to change everything we thought we knew about the age of different surfaces on Mars," said Tracy Gregg, Ph.D., assistant professor of geology at UB and chair of the Planetary Geology Division of the Geological Society of America. David Crown, Ph.D., of the Planetary Science Institute, is Gregg's co-investigator on the grant.

Gregg's research concerns an area on Mars called Hesperia Planum, which has been used since the 1980s to define the Hesperian epoch, the second of the planet's three geologic time periods.

But in the past several years, recent analyses of images obtained from the Mars Orbiter Laser Altimeter, (MOLA), the Mars Orbiter Camera (MOC) and other instruments have led to new estimates for the duration of the Hesperian epoch, ranging from just 300,000 years to 1-2 billion years, Gregg explained.

While other planetary geologists now are attempting to reconcile these two models, she said, her focus is on trying to figure out which surfaces on Mars originated in the Hesperian epoch, research that, in turn, probably will help to further define the duration of the Hesperian epoch.

"For almost 20 years, Hesperia Planum has served as the basic time marker on Mars," said Gregg.

"When we want to identify how old rocks are without the benefit of samples, we count impact craters, the big holes in planetary surfaces that are made by meteorites that crash into them," explained Gregg. "The more impact craters there are on a surface, the older it is."

But during the course of Gregg's research reviewing images of Tyrrhena Patera, a volcano located in the middle of Hesperia Planum, she began finding deposits from not one Martian geologic epoch but from several.

Gregg made her findings using images obtained from the Viking Orbiter, the Mars Global Surveyor, the MOLA and the MOC. She also will be using data NASA is making available from THEMIS, the Thermal Mapping Infrared Spectrometer, which measures surface temperatures on Mars.

"Hesperia Planum is not one age. Its surface actually is a combination of materials that are very old, materials that are very young and some that are in between," she said, "and the volcanoes there are the reason why."

Gregg recently has demonstrated that two volcanoes in western Hesperia Planum were active during a much longer period than previously was understood and that the products of the eruptions traveled much further, signaling a greater intensity of volcanic activity than originally was thought.

Her findings, she said, are similar to ones made about 20 years ago on Earth, when geologists discovered that Yellowstone National Park in Wyoming was the center crater of an enormous volcano and that its deposits stretched as far as the state of Illinois. Those findings, she said, changed fundamentally the understanding of volcanic activity on Earth.

In a similar vein, she said, the new observations about the great distances traveled by deposits of Martian volcanoes and their influence on the age of surfaces may cause a similar reconsideration of understanding of the history of Mars.

"I think that we are about to discover that Hesperia Planum, this surface that has acted as a basic time marker for Mars, has a very different age than we thought," she said. "If it turns out it's much older than we thought, then it means that the system shut down a lot earlier and the chances of finding active living organisms on Mars are much slimmer.

"If, on the other hand, it turns out to be much younger, then it means Mars still may be volcanologically active, and if it is, that increases the possibility of extant life on Mars."


Story Source:

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


Cite This Page:

University At Buffalo. "Mars May Be Much Older -- Or Younger -- Than Thought, According To UB Planetary Geologist." ScienceDaily. ScienceDaily, 24 January 2003. <www.sciencedaily.com/releases/2003/01/030124074028.htm>.
University At Buffalo. (2003, January 24). Mars May Be Much Older -- Or Younger -- Than Thought, According To UB Planetary Geologist. ScienceDaily. Retrieved August 27, 2014 from www.sciencedaily.com/releases/2003/01/030124074028.htm
University At Buffalo. "Mars May Be Much Older -- Or Younger -- Than Thought, According To UB Planetary Geologist." ScienceDaily. www.sciencedaily.com/releases/2003/01/030124074028.htm (accessed August 27, 2014).

Share This




More Space & Time News

Wednesday, August 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

SpaceX’s Falcon 9 Rocket Explodes After Liftoff

SpaceX’s Falcon 9 Rocket Explodes After Liftoff

Newsy (Aug. 23, 2014) The private spaceflight company says it is preparing a thorough investigation into Friday's mishap. Video provided by Newsy
Powered by NewsLook.com
Did Russia Really Find Plankton On The ISS? NASA Not So Sure

Did Russia Really Find Plankton On The ISS? NASA Not So Sure

Newsy (Aug. 21, 2014) Russian cosmonauts say they've found evidence of sea plankton on the International Space Station's windows. NASA is a little more skeptical. Video provided by Newsy
Powered by NewsLook.com
Space to Ground: Hello Georges

Space to Ground: Hello Georges

NASA (Aug. 18, 2014) Europe's ATV-5 delivers new science and the crew tests smart SPHERES. Questions or comments? Use #spacetoground to talk to us. Video provided by NASA
Powered by NewsLook.com
Tiny Satellites, Like The One Tossed From ISS, On The Rise

Tiny Satellites, Like The One Tossed From ISS, On The Rise

Newsy (Aug. 18, 2014) The Chasqui I, hand-delivered into orbit by a Russian cosmonaut, is one of hundreds of small satellites set to go up in the next few years. Video provided by Newsy
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