HOME >> BIOLOGY >> NEWS
April GEOLOGY and GSA TODAY media highlights

a clue. Preserved in marine mudrocks, these three-dimensional animals are typically flattened onto a single plane. It is as if they had been wrapped in clingfilm (plastic wrap) prior to burial, preventing mud and silt from entering the open spiral of the fossil. The authors consider that this ancient clingfilm was a combination of microbial films and gelatinous marine snow, and think that this now-vanished organic matter carpeted large areas of seafloors then. The nearest modern comparison can be found at the unpleasantly stagnant bottom of the Black Sea.

Phenocrysts versus xenocrysts in the youngest Toba Tuff: Implications for the petrogenesis of 2800 km3 of magma.
James E. Gardner et al. Geophysical Institute and Department of Geology and Geophysics, University of Alaska, Fairbanks, Alaska 99775-7320, USA. Pages 347-350.

Large explosive eruptions of thousands of cubic kilometers of magma represent the most horrific volcanic hazards to man. Understanding how such large bodies of magma accumulate beneath volcanoes could provide valuable insight into such eruptions. The authors have investigated the petrogenesis of the 2800 km3 of erupted magma at the Toba Tuff ~74 ka in Sumatra, Indonesia, using a combination of experimental petrology and 40Ar/39Ar dating of crystals from the tuff. The authors found that some crystals present in the magma do not crystallize experimentally from the magma at known temperatures and pressures. Those same crystals are also not in isotopic equilibrium with others that do grow experimentally. It thus appears that a large population of crystals in the tuff were foreign to the magma. Common grouping of the foreign crystals into clots implies that they came from the same source, most likely the walls of the Toba magma body. Isotopic ages and diffusive modeling suggest that the source of the foreign crystals was at least 1.5 Ma, and that some were entrained as recently as 10 years before the eruption. A new e
'"/>

Contact: Ann Cairns
acairns@geosociety.org
303-357-1057
Geological Society of America
5-Apr-2002


Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Related biology news :

1. APS awards 55 minority travel fellowships to EB 2004 (April 17-21) in Washington, DC
2. National Academies advisory: NAS Annual Meeting April 17-20
3. Physics tip sheet #41 - April 5, 2004
4. JCI table of contents, 2 April 2004
5. Nanotechnology highlights from the ACS national meeting in Anaheim, Calif., March 28-April 1
6. Story tips from the Department of Energys Oak Ridge National Laboratory, April 2004
7. Media invited to attend International Society For Heart & Lung Transplantation meeting April 21-24
8. Experimental Biology 2004 meets in Washington, D.C. April 17-21
9. Science highlights of AAN Annual Meeting in Honolulu March 29 April 5
10. Genes, Brain and Behavior Symposium April 16
11. Science Picks--Leads, Feeds and Story Seeds (April 2003)

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: April GEOLOGY and GSA TODAY media highlights

(Date:7/28/2014)... TEMPE, Ariz. - Reactions among minerals and organic compounds ... deep carbon cycle, they provide energy for the deep ... life. However, very little is known about how minerals ... Arizona State University have demonstrated how a common mineral ... negating the need for toxic solvents or expensive ...
(Date:7/28/2014)... School of Medicine have pinpointed a mechanism in part of ... the blood, linking it to both type 1 and type ... issue of Proceedings of the National Academies of Sciences ... located in a part of the hypothalamus known as ... motion that control glucose levels in the blood," said lead ...
(Date:7/28/2014)... wild relative of the domestic tomato, has been published ... headed by Professors Neelima Sinha and Julin Maloof at ... genome information may help breeders produce tastier, more stress-tolerant ... journal Nature Genetics , was lead by Bjrn ... UC Davis labs carried out work on the transcriptome ...
Breaking Biology News(10 mins):Mineral magic? Common mineral capable of making and breaking bonds 2Mineral magic? Common mineral capable of making and breaking bonds 3Glucose 'control switch' in the brain key to both types of diabetes 2
(Date:7/29/2014)... Quorum Review IRB, the industry ... accreditation by the International Association of Six ... Sigma Deployment Program. The citation recognizes robust organizational ... Quorum’s Lean Six Sigma program was evaluated by ... The designation is a public statement of excellence ...
(Date:7/29/2014)... MA (PRWEB) July 29, 2014 The ... Library of Congress was recently awarded to Juliana Hillis ... Stoneham, MA, for their project, “From an Egg, Everything: ... among 3,000 final entries for the National History Day ... than 300 historians and educators in Washington, D.C. , ...
(Date:7/28/2014)... of building materials using light, developed by researchers at ... that are often considered the realm of science fiction, ... Although cloaked starships won,t be a reality for quite ... constructing materials with building blocks a few billionths of ... way that light flies through them, and works on ...
(Date:7/28/2014)... (PRWEB) July 28, 2014 Proove ... medicine, will be exhibiting data and research conducted through ... International Spine Intervention Society’s (ISIS) 22nd Annual Scientific ... at the Hyatt Regency, in Orlando, Florida. ... and clinical competence of physicians who care for patients ...
Breaking Biology Technology:Quorum Review IRB Accredited by IASSC for Lean Six Sigma Deployment Program 2Quorum Review IRB Accredited by IASSC for Lean Six Sigma Deployment Program 3In Vitro Fertilization (IVF) was the Subject of This Year’s Winning Entry for the Prestigious Library of Congress “Discovery or Exploration in History Award” 2In Vitro Fertilization (IVF) was the Subject of This Year’s Winning Entry for the Prestigious Library of Congress “Discovery or Exploration in History Award” 3Building 'invisible' materials with light 2Proove Biosciences Exhibits Industry Leading Data and Research at International Spine Intervention Society’s 22nd Annual Scientific Meeting 2
Cached News: