Navigation Links
From grains of volcanic glass to continental rifting: New Geosphere articles now online
Date:2/11/2013

n (CIB) of south-central Alaska make locating and determining the geometry of the Border Ranges fault system (BRFS), a major feature of the region, difficult. Niti Mankhemthong and colleagues use recently collected gravity data, available aeromagnetic data, and other geophysical information as constraints to develop plausible 2D cross-section models that better image the BRFS and related geologic structures of the CIB. Their models suggest the BRFS dips 50 to 70 degrees toward the west-northwest and extends to at least 15 km. Their integrated models also show a thick sequence of sedimentary rocks and volcanic rocks (6 to 20 km depth) overlying a high metamorphosed, hydrous rock body (serpentinite) at a depth of 16 to 34 km. The volcanic rocks and serpentinite are interpreted as possible sources of the south Alaska magnetic high over the CIB. The CIB's eastern boundaries are characterized by gravity and magnetic highs of the Border Range ultramafic and mafic assemblages (BRUMA), rocks high in iron and magnesium that have been derived from the lower crust and upper mantle. Formation of the BRUMA may be related to the presences of the deeper serpentinite body. A model that includes underplated sediments at the base of the crust beneath the northwestern Chugach Mountains (12 to 40 km) is consistent with an observed regional gravity low. The underplating may be associated with the process of subducting and shortening Yakutat microplate in south-central Alaska. This paper is part of the "Neogene Tectonics and Climate-Tectonic Interactions in the Southern Alaskan Orogen" series.


New thermochronometric constraints on the Tertiary landscape evolution of central and eastern Grand Canyon, Arizona
J.P. Lee et al., U.S. Geological Survey, Denver Federal Center MS974, Denver, Colorado 80225, USA. Posted online 5 Feb. 2013; http://dx.doi.org/10.1130/GES00842.1.

The Grand Canyo
'/>"/>

Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10

Related biology news :

1. Understanding faults and volcanics, plus life inside a rock
2. Rubbing boulders, fossil mammal teeth, barrier islands, and a change in volcanic behavior
3. Finding life in the volcanic systems of the Antarctic Polar Front
4. Shimmering water reveals cold volcanic vent in Antarctic waters
5. NJIT, Chinas Bengbu Glass Institute sign agreement for R&D, training
6. Feel-good glass for windows
7. Glass offers improved means of storing UKs nuclear waste
8. Pulverized rocks, coral reefs, seawater chemistry, and continental collisions
9. Australia creates worlds first continental-scale mineral maps
10. Sea surface temperatures reach record highs on Northeast continental shelf
11. New grant to establish pan-continental bioinformatics research network in Africa
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/17/2014)... MSSA could be curbed by coating hospital surfaces ... of shark skin, according to research published in ... Infection Control . , The study modelled how ... disease bacteria through touching, sneezes or spillages. The ... formulated to resemble shark skin. The study showed ...
(Date:9/16/2014)... 2014)More than $100 trillion in cumulative public and ... dioxide (CO2)a 40 percent reduction of urban passenger ... world expands public transportation, walking and cycling in ... the University of California, Davis, and the Institute ... Further, an estimated 1.4 million early deaths could ...
(Date:9/16/2014)... viruses that make us sick can take up residence ... sneeze, cough or other troublesome symptom, according to new ... Louis. , On average, healthy individuals carry about ... report online in BioMed Central Biology . The ... diversity of viruses in healthy people. , The ...
Breaking Biology News(10 mins):Sharks' skin has teeth in the fight against hospital superbugs 2Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 2Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 3Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 4Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 5Healthy humans make nice homes for viruses 2Healthy humans make nice homes for viruses 3
... While newly published research confirms that under laboratory circumstances prion-protein ... this is unlikely to occur in real life. In addition, ... do take up these disease-associated proteins are different from the ... will be published in the Journal of Pathology. , Since ...
... & Science University researchers gather a princely sum of ... , Scientists in the OHSU School of Medicine's ... to report a new approach using eggs of the ... Xenopus laevis, to understand how the Fanconi anemia proteins ...
... mixing of pasta metaphors, Pacific Northwest National Laboratory ... biological molecules lasagna-like around spaghetti-like carbon nanotubes. ... of applications, from ultra-precise blood-sugar monitoring to infectious-agent ... at the Department of Energy campus' W.R. Wiley ...
Cached Biology News:New evidence questions the simple link between prion proteins and madcow disease 2New evidence questions the simple link between prion proteins and madcow disease 3Clawed frog helps Fanconi anemia research make leaps 2Clawed frog helps Fanconi anemia research make leaps 3A biosensor layered like lasagna 2
(Date:9/16/2014)... a deicing film for radar domes have now refined ... glass. , The new work by Rice chemist ... from windshields to skyscrapers free of ice and fog ... , The technology was introduced this month in the ... . , The material is made of graphene ...
(Date:9/16/2014)... CIRTEC Medical Systems’ Board of Directors has ... CIRTEC. , “I am delighted to be joining ... Brian Highley. “The company has made great strides improving ... over the past two years. The goal now is ... expand the services Cirtec offers its medical device customers.” ...
(Date:9/16/2014)... 16, 2014 Convoy Therapeutics, Inc., ... effective products to treat patients directly at the ... proprietary SPACE™ Technology Platform announced today that John ... present at the White Hat Life Science Investor ... Regency Phoenix. In addition, interested individuals can ...
(Date:9/16/2014)... NEW ORLEANS , Sept. 16, 2014 ... Austin, Texas -based cybersecurity company focused on ... 2FA ONE, will support the ability to generate a ... As a pioneer of user-based RFID authentication, ... used for physical access, for many years. RFID authentication ...
Breaking Biology Technology:Nanoribbon film keeps glass ice-free 2Convoy Therapeutics to Present at WhiteHat Investor Conference September 18, 2014 2Convoy Therapeutics to Present at WhiteHat Investor Conference September 18, 2014 32FA, Inc. Announces RFID-based One-Time Password (OTP) Authentication 2
... New England Biolabs has expanded its line of PCR ... Hot Start DNA Polymerases. Optimized blends of Taq ... offer robust amplification across a wide range of templates, including ... Deep Vent increases the fidelity and robustness of Taq ...
... PARK, N.C., Feb. 14, 2011 India,s premier ... Neurological Society of India & Congress of Neurological ... December.  The event was a convergence of leading ... from across the globe to discuss advances made ...
... Va., Feb. 14, 2011 Technology Catalysts International (TCI), ... research on trends and development in drug delivery have ... drugs with limited patent life, a different pathway for ... product a competitive edge in a crowded pharmaceutical field. ...
Cached Biology Technology:New England Biolabs Introduces OneTaq™ DNA Polymerase, a Robust Solution for Routine and Difficult PCR 2Max Neeman International Initiates Advisory Committee to Advance and Improve the Conduct of Complex Neurological Trials in India 2Parenteral Depots Offer $8 Billion of Reformulation Opportunities and a Strong Competitive Edge in Crowded Pharmaceutical Space 2
Thermo Forma provides an array of accessory Racks for the Cryo/CryoPlus 16" Diameter storage system. To maximise inventory capacity a Jumbo Arrowhead configuration is recommended. You may choose betw...
... shakers combine high durability and capacity with ... heavy-duty mechanism prevents vibration, allowing the unit ... Every other part, from the large rubber ... machined aluminum platform is designed to last ...
The Holten Horizontal series of laminar airflow work benches offers comfort and ease of use....
... Forma Incubated Orbital Shakers combine ... temperature performance and ease of use. ... vibration, allowing the unit to run ... loads. The unit's class-leading temperature range ...
Biology Products: