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Computer models solve geologic riddle millions of years in the making
EurekAlert
An international team of scientists used computer modeling to reveal, for the first time, how giant swirls form during the collision of tectonic plates — with subduction zones stuttering and recovering after continental fragments slam into them. The team's 3-D models suggest a likely answer to a question that has long plagued geologists: why do long, curving mountain chains form along some subduction zones — where two tectonic plates collide, pushing one down into the mantle?
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Black-box search tricky without ocean map
The Wall Street Journal
Search teams have started to prepare for the possibility of scouring a remote patch of the southern Indian Ocean floor amid a flurry of recent sightings of potential debris from Malaysia Airlines Flight 370. But if the search operation has so far been tricky, the retrieval of the two black boxes brings its own set of challenges. The U.S. military would be working in an unmapped area of seabed, covered by anything from deep ravines to hilly terrain arising from muddy plains.
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Local geology, recent heavy rains likely factors in devastating mudslide
HeraldNet
The devastating mudslide on March 22 was a harsh reminder of the natural forces that carved out this rugged landscape. When a ridge above the north bank of the North Fork Stillaguamish River in Oso, Wash., gave way and swept across into a neighborhood on the opposite bank, it exposed the layers of soil beneath, and probably provided a clue to the geologists who will later analyze the slide area.
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MARK YOUR CALENDAR

Date Event More Information
April 9-11 GSA Meeting, Blacksburg, Va. For more information, call 303-412-6205 or email aipg@aipg.org
April 15-17 116th National Western Mining Conference and Exhibition, Denver www.coloradomining.org
April 16-17 AIPG 5th Annual Symposium Marcellus, Utica, and Point Pleasant Shale: Energy Development and Enhancement, Columbus, Ohio Register here; Additional information for exhibitor and sponsor opportunities available at AIPG
April 23-24 5th Conference: Innovative Environmental Assessment and Remediation Technology, Kennesaw, Ga. Register here; Additional information for exhibitor and sponsor opportunities available at AIPG
April 24-25 GSA Meeting, Lincoln, Neb. For more information, call 303-412-6205 or email aipg@aipg.org
June 17-18 4th Annual Workshop on: The Groundwater/Surface Water Interface — Characterization, Evaluation and Compliance, Roscommon, Mich. Hosted by the AIPG Michigan Section
June 25-26 15th Annual Energy Exposition and Symposium, Billings, Mont. The Energy Exposition
Aug. 25-27 2014 Unconventional Resources Technology Conference, Denver URTeC
Aug. 28-Sept. 7 AWG 2014 Canadian Rockies Geology Field Trip, out of Calgary, Alberta, Canada Register here; contact Debbie Hanneman for more information
Sept. 13-16 2014 AIPG/AHS National Conference Water & Rocks — the Foundations of Life, Prescott, Ariz. Conference Website
Sept. 19-22, 2015 AIPG 2015 National Conference, Anchorage, Alaska Hosted by AIPG National and co-hosted by AIPG Alaska Section


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Seismic shift: How the Good Friday earthquake of 1964 changed science
Anchorage Daily News
On March 27, 1964, the Great Alaska Earthquake released more energy than all other North American quakes since. Its magnitude, 9.2, made it the second most powerful earthquake ever recorded. In the words of Peter Haeussler, U.S. Geological Survey research geologist, the whole world jiggled "like a giant water balloon." But something else also shifted that day: Science.

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New method gives way to noninvasive subsurface data
Science Network WA via Phys.org
A hydrogeologist has found an inexpensive, high-quality three-dimensional imaging method for aquifers and other below-ground features. Conventional cross-well surveys require a monitoring bore containing sensors, and another source well in which a seismic shock is produced. Now, a Ph.D. student has eliminated the for a dedicated monitoring well.

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There may be a 2nd massive ocean deep beneath the Earth's surface
Smithsonian
Deep within the Earth, staggering pressures mix with high temperatures to compact regular materials into exotic minerals. Under these extreme conditions, one familiar mineral is transformed into a material called ringwoodite. While ringwoodite has been found before, researchers in Brazil found a sample that had an even greater surprise locked inside.

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Geosphere presents articles examining lithospheric evolution and geologic history
Geological Society of America via Science Codex
Geosphere articles posted online 17 Mar. 2014 include additions to two series: "CRevolution 2: Origin and Evolution of the Colorado River System II" and "Origin and Evolution of the Sierra Nevada and Walker Lane." Other articles present new seismic data for the Slate Range of California; the first detailed geologic map from the Likhu Khola region of east central Nepal; and a review of pre-21st century ideas about the origin of Grand Canyon.
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Tasmanian geologists explain new Bendigo gold reef theory
Australian Mining
Two University of Tasmania geologists have achieved international recognition with a new theory about the formation of gold deposits. For seven years Dr. Stuart Bull and Professor Ross Large studied the geology and chemistry around the Bendigo gold reefs in Victoria, one of the sites of Australia's first gold rush, and have bucked conventional theories about the deposit.
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TRENDING ARTICLES
Missed last week's issue? See which articles your colleagues read most.

    Solving the Midwest's biggest geologic mystery (Northwestern University via Phys.org)
Pygmy dinosaur, cousin of T Rex, roamed the Arctic (Discover Magazine)
New method gives way to noninvasive subsurface data (Science Network WA via Phys.org)

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Mapping finds offshore habitat
The Post and Courier
The Lowcountry offshore is mostly barren sand bottom to the edge of the Continental Shelf — according to conventional wisdom. But three times now, College of Charleston geologists have dropped high-tech imaging devices to map that bottom, and three times they found "these amazing features" they didn't expect — ancient river channels. The seafloor offshore, in other words, appears to be webbed with the three-foot-high, hardbottom ridge contours of large river deltas.
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Less uncertainty surrounding petroleum systems in the Barents Sea
Energy Global
Significant leakage has been caused by erosion and uplift in the Barents Sea, which creates a high degree of uncertainty as to where oil and gas may be accumulated. Migris AS has launched a "Barents Sea Charge Study" in partnership with Petroleum-Geo Services. A newly-developed simulation tool combined with statistical analysis methods is used in the study, will help to improve definition of the uncertainties surrounding petroleum systems in the Barents Sea.
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Meteorite may have crashed in Ontario, Canada
London Community News
Western University researchers are looking for a "basketball-sized" meteorite that lit up the southwestern Ontario sky on March 18 and may have crashed north of St. Thomas in Ontario, Canada. Video footage showing the meteorite "as bright as the full moon," and still photos captured by Western's network of all-sky cameras in southern Ontario that scan the atmosphere monitoring for meteors are posted on the university's website, along with site maps.
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NASA research could lead to way of predicting sinkholes
Salina Journal
Radar images taken from planes or satellites could someday be used to predict where sinkholes might form — a potential boon for Florida, the nation's sinkhole capital. The possibility of an early-warning system stems from new NASA research into a monstrous sinkhole that opened in Louisiana in 2012, forcing the evacuation of hundreds of residents.
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