The Isthmus of Panama: Out of the Deep Earth
As dates in geologic history go, the formation of the slender land bridge that joins South America and North America is a red-letter one. More than once over the past 100 million years, the two great landmasses ...
Subduction zones reveal sulphur cycle and mineral potential
Reasearch led by West Australian scientists into 'subduction' during tectonic plate collisions has provided new insights into the global sulphur cycle.
Mercury contracted more than prior estimates, evidence shows
New evidence gathered by NASA's MESSENGER spacecraft at Mercury indicates the planet closest to the sun has shrunk up to 7 kilometers in radius over the past 4 billion years, much more than earlier estimates.
Dynamic stressing of a global system of faults results in rare seismic silence
In the global aftershock zone that followed the major April 2012 Indian Ocean earthquake, seismologists noticed an unusual pattern – a dynamic "stress shadow," or period of seismic silence when some faults near failure ...
Systematic shifts in subducting slab behavior with depth
When tectonic plates collide, the less buoyant plate will, in some cases, be forced beneath the other. At such subduction zones the sinking tectonic plate, known as a slab, does not follow a simple path from the surface to ...
A custom-built rig can put rock samples under the levels of strain they experience deep inside Earth
(Phys.org) —"I have always been interested in the origins of plate tectonics," said Philip Skemer, PhD, assistant professor in the Department of Earth and Planetary Sciences in Arts & Sciences at Washington ...
Study of Earth's crust tells of first plate tectonics and life on Earth
Provocative new research published this month in the journal Geology suggests that oceanic plate subduction was operating from the earliest times in Earth's history, meaning conditions for the formation of lif ...
Massive exoplanets may be more earth-like than thought: 'Super-earths' likely to have both oceans and continents
(Phys.org) —Massive terrestrial planets, called "super-Earths," are known to be common in our galaxy, the Milky Way. Now a Northwestern University astrophysicist and a University of Chicago geophysicist report the odds ...
Scientists anticipated size and location of 2012 Costa Rica earthquake
Scientists using GPS to study changes in the Earth's shape accurately forecasted the size and location of the magnitude 7.6 Nicoya earthquake that occurred in 2012 in Costa Rica.
Image: Christmas tree fjords
This Envisat image was acquired over the Westfjords peninsula in northwest Iceland.
Researchers propose foundering of lower island-arc crust explains continental Moho
Keep a lid on it: The controversy over Earth's oldest rocks
New evidence is shedding light on the processes that formed Earth's oldest rock and mineral record – processes that influenced the early evolution of life.
The complicated birth of a volcano: Researchers unravel the origin of Antarctic seamounts
They are difficult to reach, have hardly been studied scientifically, and their existence does not fit into current geological models: the Marie Byrd Seamounts off the coast of Antarctica present many riddles ...
Geo-scientists provide glimpse into ancient ocean and formation of the Himalayas
New findings on the geology of southern Tibet by researchers from Trinity College Dublin, Oxford University, University of Hong-Kong, University of Sydney and the NERC (UK) Isotope Geosciences Laboratory have revealed a vast ...