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:3/30/2017)... , March 30, 2017  On April 6-7, ... Hack the Genome hackathon at Microsoft,s headquarters ... two-day competition will focus on developing health and wellness ... Hack the Genome is the first ... tremendous. The world,s largest companies in the genomics, tech ...
(Date:3/30/2017)... YORK , March 30, 2017 Trends, ... type (physiological and behavioral), by technology (fingerprint, AFIS, iris ... voice recognition, and others), by end use industry (government ... and immigration, financial and banking, and others), and by ... Europe , Asia Pacific , ...
(Date:3/28/2017)... , March 28, 2017 The ... Hardware (Camera, Monitors, Servers, Storage Devices), Software (Video Analytics, ... Region - Global Forecast to 2022", published by MarketsandMarkets, ... 2016 and is projected to reach USD 75.64 Billion ... and 2022. The base year considered for the study ...
Breaking Biology News(10 mins):
(Date:4/20/2017)... and PETACH TIKVAH, Israel , April 20, ... developer of adult stem cell technologies for neurodegenerative diseases, announced ... present at the Alliance for Regenerative Medicine,s (ARM) 5 th ... April 27, 2017 at 09:40 EDT in Boston ... , MD, MHSc, Chief Medical Officer & Chief Operating Officer, ...
(Date:4/19/2017)... ... April 18, 2017 , ... ... Labs . The move comes after the company changed focus to making analytical ... new brand and our new technology,” says CEO Robert Hart. Founders Bernardo Cordovez, ...
(Date:4/19/2017)... Oregon and PUNE, India , April 19, 2017 ... "Membrane Microfiltration Market: Global Opportunity Analysis and Industry Forecast, 2014-2022 ," the ... garner $12,858 million by 2022, registering a CAGR of 9.6% from 2016 to ... ... ...
(Date:4/18/2017)... ... April 18, 2017 , ... METTLER TOLEDO ... to concentration levels and vice-versa. , One of the key applications for the ... concentration control or monitoring. The principle of this analytical method is based on ...
Breaking Biology Technology:
Cached News: