HOME >> BIOLOGY >> NEWS
November GEOLOGY and GSA TODAY highlights

onsistent differences; the aggregate thickness of spherules is generally 10 to 100 times greater in the Archean layers, and they display textures rarely seen in younger spherules. These contrasts may reflect progressive changes in both impactors and their target, Earths surface, through Earth history. A decrease in the size of impactors and increases in the depth of the Earths ocean and the fraction of Earths surface covered by continental crust through time could explain the observed differences.

Los Angeles: The most differentiated basaltic martian meteorite. Alan E. Rubin et al.

Los Angeles is a new martian meteorite. It is a type of igneous rock called basaltic shergottite, formed from volcanic lava flows on Mars. As the parent magma cooled and minerals crystallized, the remaining liquid became richer in iron, phosphorus, and other elements that do not readily partition into early crystallizing phases. Among the 16 known martian meteorites, Los Angeles is by far the most enriched in iron, phosphorus, and many trace elements, and is the most depleted in some other trace elements such as chromium. The mineralogical characteristics of pyroxene in this meteorite imply that the parent rock cooled more slowly than other basaltic shergottites and thus may have been more deeply buried. Like other martian meteorites, Los Angeles was intensely shocked (transforming the major mineral plagioclase into a rare plagioclase-composition glass called maskelynite) as it was launched into space by a meteoritic impact that blasted the surface of Mars.

Numerical simulations of glacial-valley longitudinal profile evolution. K.R. MacGregor et al.

Valley glaciers are very important in shaping mountainous landscapes. They broaden valley bottoms and produce the classic U-shaped valley cross section. In addition, glaciers can enhance local valley relief, generate multiple steps and overdeepenings of valley floors, and they cause tributary valleys to hang
'"/>

Contact: Ann Cairns
acairns@geosociety.org
303-447-2020 ext 156
Geological Society of America
24-Oct-2000


Page: 1 2 3 4 5

Related biology news :

1. Tip sheet for the November 25, 2003 Neurology journal
2. Highlights of the November 2003 Journal of the American Dietetic Association
3. November science picks!
4. JCI Table of Contents, November 3, 2003
5. Story tips from the Department of Energys Oak Ridge National Laboratory, November 2003
6. Conference on invasive and alien plants November 2003
7. JCI Table of Contents, November 18, 2002
8. Science picksleads, feeds and story seeds (November 2002)
9. November GEOLOGY and GSA TODAY media highlights
10. Pan-African Malaria Conference November 17-22 in Arusha, Tanzania
11. Record in research dollars: UH receives $12.3 million in November

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


(Date:5/6/2017)... , May 5, 2017 ... just announced a new breakthrough in biometric authentication ... exploits quantum mechanical properties to perform biometric authentication. These ... smart semiconductor material created by Ram Group and ... finance, entertainment, transportation, supply chains and security. Ram ...
(Date:4/13/2017)... , April 13, 2017 UBM,s Advanced Design ... will feature emerging and evolving technology through its ... Summits will run alongside the expo portion of the ... panels and demonstrations focused on trending topics within 3D ... design and manufacturing event will take place June 13-15, 2017 ...
(Date:4/11/2017)... 11, 2017 NXT-ID, Inc. (NASDAQ:   ... announces the appointment of independent Directors Mr. Robin D. ... Board of Directors, furthering the company,s corporate governance and expertise. ... Gino Pereira , ... forward to their guidance and benefiting from their considerable expertise ...
Breaking Biology News(10 mins):
(Date:6/28/2017)... Spectrecology LLC has announced a 4 pronged ... research dollars. The program is designed to help educators ... and photonics equipment despite current funding challenges.  The key ... Innovations in Spectroscopy Grants – Discounts & ... for the classroom or research. ...
(Date:6/28/2017)... ... June 28, 2017 , ... ... three research projects accepted for presentation at the 33rd Annual Meeting of the ... – including some of the world’s top thought leaders in reproductive medicine – ...
(Date:6/28/2017)... ... June 28, 2017 , ... Supplies of the critical medical isotope molybdenum-99 (Mo-99) ... Society of Nuclear Medicine and Molecular Imaging (SNMMI) 2017 annual meeting in Denver, Colorado ... in 30 to 40 million nuclear medicine procedures worldwide every year. (1) , ...
(Date:6/27/2017)... ... 2017 , ... Brain State Technologies, a leading neurotechnology company, ... 15th to fund production of the new B2v2 wearable brainwave balancing headband. Over ... more than 150% in a little over a week. , Utilizing Brain State’s ...
Breaking Biology Technology:
Cached News: