HOME >> BIOLOGY >> NEWS
Orbiter provides new hints of past groundwater flows on Mars

A spacecraft recently arrived at Mars has provided new evidence that fluids, likely including water, once flowed widely through underlying bedrock in a canyon that is part of the great Martian rift valley.

The new color images from the HiRISE camera aboard NASA's Mars Reconnaissance Orbiter show an equatorial landscape of hills composed of dozens of alternating layers of dark- and light-toned rocks, and crossed by dark sand dunes.

Within those layered deposits, the exquisitely detailed images show, there are a series of linear fractures, called joints, that are surrounded by "halos" of light-toned bedrock. In a paper to be published 16 February in the journal Science, published by the American Association for the Advancement of Science (AAAS), researchers argue that the "halos" offer clear evidence of past fluid flow through the bedrock.

Minerals in the fluid acted like cement to strengthen and bleach the rock, they say. The cemented rock proved more resistant to wind erosion than other features on the canyon walls and floor. It now serves as an exposed record of hydrological activity and offers a promising site to search for evidence of habitable niches in the Martian past.

Chris H. Okubo, the principal author of the paper and a postdoctoral researcher at the University of Arizona's Lunar and Planetary Laboratory, said the new images strongly suggest that subsurface fluids -- probably water, liquid carbon dioxide or a combination of the two -- once flowed abundantly in the western Candor Chasma region of Mars.

Okubo will discuss the paper during a 15 February news briefing at the 2007 AAAS Annual Meeting in San Francisco. The briefing also will include speakers from a 16 February Annual Meeting symposium on "The New Mars: Habitability of a Neighbor World."

Candor Chasma is one of several canyons that make up the great Martian rift valley called Valles Marineris. The rift valley would extend across t
'"/>

Contact: Earl Lane
elane@aaas.org
202-326-6431
American Association for the Advancement of Science
15-Feb-2007


Page: 1 2 3 4

Related biology news :

1. Female gender provides an advantage in renal diseases
2. Forecasting system provides flood warnings to vulnerable residents of Bangladesh
3. Genomics study provides insight into the evolution of unique human traits
4. Study provides new data about the laws governing embryo development in organisms
5. Sea anemone genome provides new view of our multi-celled ancestors
6. Latest data shows MabThera provides significant, sustained relief from symptoms of RA
7. Understanding the global carbon budget -- Woods Hole Research Center expert provides insights
8. Nanotechnology provides green path to environmentally sustainable economy
9. American Association for Cancer Research provides support for promising cancer scientists
10. Life-long learning -- nature provides natural inspiration for education
11. SNMTS provides $50,000 in 2007 Paul Cole, Mickey Williams Minority Student Technologist Scholarships

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Orbiter provides new hints past groundwater flows Mars

(Date:10/16/2014)... synthesis of recent research findings to inform their management ... states. , The Ecology and Management of Moist ... of the Relevant Biophysical Science and Implications for Future ... U.S. Forest Service,s Pacific Northwest Research Station, is a ... synthesis of the large body of scientific information on ...
(Date:10/16/2014)... NXT-ID, Inc. (NASDAQ: NXTD ... company focused on the growing mobile commerce market announces ... the Smart Wallet, at the 13 th annual ... global conference on the intersection of technology and the ... , founder and publisher of the Strategic News Service™, ...
(Date:10/15/2014)... is spreading rapidly and to an unexpected extent. The ... past and the virus shows a new disease dynamic ... For this reason, the German National Academy of Sciences ... Engineering, and the Union of the German Academies of ... Ebola epidemic today. , In the statement the academies ...
Breaking Biology News(10 mins):New report synthesizes best available science on management of moist mixed-conifer forests 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3Academies call for consequences from the Ebola virus epidemic 2Academies call for consequences from the Ebola virus epidemic 3Academies call for consequences from the Ebola virus epidemic 4Academies call for consequences from the Ebola virus epidemic 5
(Date:10/19/2014)... The report "Unmanned Ground Vehicle Market by ... Type & by Geography - Forecasts & Analysis ... vehicle market into various sub segments with an ... report also identifies the factors driving this market, ... the adoption trends. , The unmanned ground vehicle ...
(Date:10/18/2014)... The Asia-Pacific Bio-based Advanced Phase Change ... advanced phase change material market in Asia-Pacific with ... the TOC of the Asia-Pacific Bio-based Advanced Phase ... of the in-depth analysis provided. This also provides ... bio-based advanced phase change material market, and is ...
(Date:10/18/2014)... The Asia-Pacific hardware encryption display market ... with analysis and forecast of revenue. This market was ... reach $51,362.6 million by 2018, at a CAGR of ... TOC of the Asia-Pacific hardware encryption market report, to ... also provides a glimpse of the segmentation of the ...
(Date:10/18/2014)... The Biomass Power industry ... years to 2014. The industry's expansion has been propelled ... that encouraged the use of biomass power. Furthermore, the ... which require local utilities to generate electricity from renewable ... Increased campaigning for green technology also influenced industry performance ...
Breaking Biology Technology:Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 2Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 3Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 4Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 5The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 3The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 4The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific hardware encryption display market is expected to reach $51,362.6 million by 2018 - New Report by MicroMarket Monitor 3Biomass Power in the US Industry Market Research Report from IBISWorld Has Been Updated 2Biomass Power in the US Industry Market Research Report from IBISWorld Has Been Updated 3
Cached News: