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Sea floor map result stuns experts - VIDEO

Sea floor map result stuns experts - VIDEO | Geology | Scoop.it
Sea floor map result stuns experts New Zealand Herald We were surprised to find it wasn't dominated by volcanic rocks, but more a mixture of them with large tracts of sedimentary rocks." The findings also backed the common belief that the ridge was...
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YEC Geo's curator insight, January 9, 10:30 AM

What I find interesting here is that this ridge was supposed to be part of an intra-oceanic volcanic arc, marking the subduction zone between converging lithospheric plates  (http://www.sciencedirect.com/science/article/pii/S0012821X01005349?np=y ).

 

If large parts of this system are sedimentary, what are the implications for the subduction theory?

Geology
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New fossil shows ancient spiders had extra eyes

New fossil shows ancient spiders had extra eyes | Geology | Scoop.it
UPI.com New fossil shows ancient spiders had extra eyes UPI.com MANCHESTER, England, April 14 (UPI) -- Using advanced infrared imaging technologies, researchers from the American Museum of Natural History and the University of Manchester, in...
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Newly Discovered North Sea Coal 'Could Power Britain for Centuries'

Newly Discovered North Sea Coal 'Could Power Britain for Centuries' | Geology | Scoop.it

Scientists have discovered huge coal deposits under the North Sea that could power Britain for centuries. 

Data from North Sea oil and gas exploration has been used to build a picture of the large coal deposits.

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Animation Shows the Shocking Speed of the Washington Landslide

Animation Shows the Shocking Speed of the Washington Landslide | Geology | Scoop.it
Animation Shows the Shocking Speed of the Washington Landslide
Wired
The same chunk of land moved a little in 2006, which probably destabilized the area. The ground consisted of fairly loose sediments that had been deposited by glaciers.
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Peru Volcano Awakens After 40 Years

Peru Volcano Awakens After 40 Years | Geology | Scoop.it
Life]. It's been four decades since a volcano in Peru has awakened, but on Tuesday, it came back to life and began spewing ash and dust into the sky. The volcano is located in southwestern Peru and has led to more than 50 ...
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Study Reveals How and When Earth Developed Its Rigid Tectonic Plates

Study Reveals How and When Earth Developed Its Rigid Tectonic Plates | Geology | Scoop.it
Newly published research from Yale University and Université de Lyon in France shows how and when Earth developed its rigid tectonic plates and why Venus never has.
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Hot mantle drives elevation, volcanism along mid-ocean ridges

Hot mantle drives elevation, volcanism along mid-ocean ridges | Geology | Scoop.it
Phys.Org
Hot mantle drives elevation, volcanism along mid-ocean ridges
Phys.Org
Scientists have found that temperature deep in Earth's mantle controls the expression of mid-ocean ridges, mountain ranges that line the ocean floor.
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Saudi Arabia may have diamonds

Saudi Arabia may have diamonds | Geology | Scoop.it
Saudi Arabia may have diamonds
Al-Bawaba
According to President of the Saudi Geological Survey (SGS) Dr.
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Detecting diamonds with X-ray technology

Detecting diamonds with X-ray technology | Geology | Scoop.it
Phys.Org
Detecting diamonds with X-ray technology
Phys.Org
In order to find the gems nonetheless, it has so far been necessary to break up the igneous rock into very small pieces. That consumes large quantities of water and energy.
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Chile lives with quake expectation

Chile lives with quake expectation | Geology | Scoop.it
BBC News
Chile lives with quake expectation
BBC News
Phenomena such as tsunamis leave tell-tale traces in the sediments that can be used to date the occurrence of big events thousands of years back in time.
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Prehistoric Spider Footprints

Prehistoric Spider Footprints | Geology | Scoop.it
Fossil Detectives Close the Case on Prehistoric Spider Footprints Wired When paleontologist Raymond Alf (the museum's namesake) retrieved the fossil in 1968, he did some experimenting to determine whether the eight-legged footprints were the work...
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Washington mudslide Q&A: What caused it?

Washington mudslide Q&A: What caused it? | Geology | Scoop.it
MyNorthwest.com
Washington mudslide Q&A: What caused it?
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Ancient Indonesian Climate Shift Linked To Glacial Cycle

Ancient Indonesian Climate Shift Linked To Glacial Cycle | Geology | Scoop.it
Ancient Indonesian Climate Shift Linked To Glacial Cycle
RedOrbit
Image Caption: Lake Towuti, an ancient lake on the island of Sulawesi in central Indonesia, has yielded a 60,000-year sedimentary record of Indonesian climate.
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YEC Geo's curator insight, March 27, 12:07 AM

What interested me about this re-Scooped article was the following:

 

“Surprisingly absent from the data, Russell says, is the influence of other processes known to drive climate elsewhere in the tropics. In particular, there was no sign of climate change in Indonesia associated with Earth’s orbital precession, a wobble caused by Earth’s axis tilt that generates differences in sunlight in a 21,000-year cycle.

‘There’s very little indication of the 21,000-year cycle that dominates much of the tropics,” he said. “Instead we see this very big set of changes that appear linked to the amount of ice on earth.’ “

 

I’ve always been highly skeptical that changes in solar radiation can be tracked in the stratigraphic record, which is what the above statement references.  Basically, the “wobble” of the earth around its axis is supposed to affect the amount of sunlight which reaches the earth, which in turn affects climate which then affects sedimentation, which gets recorded in rock layers.  It just seems to me that there are too many variables involved in the complex source-to-sink process of sediment deposition to be able to reliably correlate changes in sunlight to thickness of sediment layers. 

 

For an interesting discussion on this topic, see here:  http://dynamic-earth.blogspot.com/2008/02/milankovitch-cycles-and-stratigraphy.html&nbsp.&nbsp.  (and check out the catchy geoblog titles in the blogroll on the right—examples include “Looking for Detachment,” “Magma Cum Laude,” and one of my favorites, “All My Faults are Stress Related”)

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Immortalized Fossil Fern Reveals Evolutionary Standstill

Immortalized Fossil Fern Reveals Evolutionary Standstill | Geology | Scoop.it
Immortalized Fossil Fern Reveals Evolutionary Standstill LiveScience.com "The genome size of these reputed living fossils has remained unchanged over at least 180 million years — a paramount example of evolutionary stasis," the authors wrote in the...
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Mars was once warm and wet, but not for long...

Mars was once warm and wet, but not for long... | Geology | Scoop.it
Mars was once warm and wet, but not for long GMA News Unmanned spacecraft have sent home tantalising images of gouged canyons, valleys and sedimentary deltas, while landers have found hydrous rocks, all suggesting Mars at one time hosted hundreds...
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Field study shows possibility of deflecting seismic waves around desired geologic surface areas

Field study shows possibility of deflecting seismic waves around desired geologic surface areas | Geology | Scoop.it
(Phys.org) —A team of researchers in France has successfully demonstrated small-scale reflection of seismic waves around a desired geological area. In their paper published in the journal Physical Review Letters, the ...
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Massive asteroid may have kickstarted the movement of continents

Massive asteroid may have kickstarted the movement of continents | Geology | Scoop.it
Earth was still a violent place shortly after life began, with regular impactors arriving from space. For the first time…
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Tungurahua volcano: Spectacular pictures capture eruption in Ecuador

Tungurahua volcano: Spectacular pictures capture eruption in Ecuador | Geology | Scoop.it
Metro
Tungurahua volcano: Spectacular pictures capture eruption in Ecuador
Metro
Pictured: Ecuador's 'throat of fire' volcano erupts The Tungurahua volcano spews a column of ash miles high (Picture: AP).
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Researchers Observe What Happens During a Quantum Phase Transition

Researchers Observe What Happens During a Quantum Phase Transition | Geology | Scoop.it
In a newly published study, researchers observe what happens during a quantum phase transition, and compare the “quantum melting” of the magnetic structure with the classical “thermal melting” phase transition.
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Mercury's Volcanic Activity Lasted Billions of Years

Mercury's Volcanic Activity Lasted Billions of Years | Geology | Scoop.it
 
 
Mercury is the last of the classical planets, the planets known to the astronomers of Egypt and Greece and Rome and the Far East. It’s an object that has captivated the imagination and the attention of astronomers for millennia.
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Researchers may have solved mystery of the Moons age

Researchers may have solved mystery of the Moons age | Geology | Scoop.it
The Space Reporter Researchers may have solved mystery of the Moons age The Space Reporter Radiometric clocks are “set” when each rock forms, meaning the moment an igneous rock solidifies from magma, a sedimentary rock layer is deposited or a rock...
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Archaeageddon: how gas-belching microbes could have caused mass extinction

Archaeageddon: how gas-belching microbes could have caused mass extinction | Geology | Scoop.it
Archaeageddon: how gas-belching microbes could have caused mass extinction
Nature.com
But the microbes did not have a way to process acetate, one of the key compounds that made up the sediment reserves.
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When Did Anthropogenic Global Warming Begin?

When Did Anthropogenic Global Warming Begin? | Geology | Scoop.it
Image Credit: Economist By WUWT Regular “Just The Facts: Note: This article builds upon a previous article, When Did Global Warming Begin?, which offers highly recommended background for this article.
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Researchers Explain The Mechanisms Behind Off-Rift Volcanoes

Researchers Explain The Mechanisms Behind Off-Rift Volcanoes | Geology | Scoop.it
Researchers Explain The Mechanisms Behind Off-Rift Volcanoes
RedOrbit
Volcanoes often occur in rift valleys, within the rift itself or on the rift flanks as e.g. in East Africa.
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Computer Models Solve Age-Old Geologic Riddle

Computer Models Solve Age-Old Geologic Riddle | Geology | Scoop.it
Scientific Computing Computer Models Solve Age-Old Geologic Riddle Scientific Computing The team's 3-D models suggested a likely answer to a question that has long plagued geologists: Why do long, curving mountain chains form where two tectonic...
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Fossils of earliest stick insect to mimic plants discovered

Fossils of earliest stick insect to mimic plants discovered | Geology | Scoop.it
The new fossils indicate that leaf mimicry was a defensive strategy performed by some insects as early as in the Early Cretaceous, but that additional refinements characteristic of recent forms, such as a curved part of the fore ...
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