Geology

A tiny fragment of Martian meteorite 1.3 billion years old contains a 'cell-like' structure, which investigators say once held water, according to findings published in Astrobiology.

While investigating the Martian meteorite, known as Nakhla, Dr. Elias Chatzitheodoridis of the National Technical University of Athens found an unusual feature embedded deep within the rock. In a bid to understand what it might be, he teamed up with long-time friend and collaborator Professor Ian Lyon at the University of Manchester. 


American cars didn't cause all climate change, no matter what you may have read. Around 13,000 years ago, a sudden, catastrophic event caused drastic climate change and much of the Earth was plunged into a period of cold climatic conditions and drought. This drastic climate change, now called the Younger Dryas, coincided with the extinction of Pleistocene megafauna, such as the saber-tooth cats and the mastodon, and resulted in major declines in prehistoric human populations, perhaps including the termination of the Clovis culture in America.


By tracking seismic shifts, researchers say they may be able to predict a major quake off the coast of Istanbul.

When a segment of a major fault line goes quiet, it can mean one of two things - an inactive “seismic gap” which is the result of two tectonic plates placidly gliding past each other, or the seismic gap may be filled by an earthquake after quietly building tension for decades.

Researchers say they have found evidence for both types of behavior on different segments of the North Anatolian Fault — one of the most energetic earthquake zones in the world. The fault, similar in scale to California’s San Andreas Fault, stretches for about 745 miles across northern Turkey and into the Aegean Sea.

ESA Satellites are showing clouds of sulfur dioxide exiting from Iceland’s Bardarbunga volcano.

It may be mostly hidden underneath the Vatnajokull glacier in the center of the country but Bardarbunga isn't shy about saying hello, it has had up to 400 eruptions in the last 10,000 years, one of which produced more lava than any other volcano on Earth during that time.

23 of those were geologically recent.

Bardarbunga eruptions seem to happen even more often than colony collapse disorders in bees, so Iceland knows it's best not to get too complacent when something sitting on two volcanic rift zones starts to put on a show:  It seems to erupt twice per century on average and the last one was in...1910.

Tick tock, tick tock...

Researchers say that magma columns in the Earth's interior can cause continental breakup – under the right circumstances.

In some parts of the Earth, material rises upwards like a column from the boundary layer of the Earth's core and the lower mantle to just below the Earth's crust hundreds of kilometers above. Halted by the resistance of the hard crust and lithospheric mantle, the flow of material becomes wider, taking on a mushroom-like shape. Specialists call these magma columns mantle plumes or simply plumes.

The rise of the Tibetan plateau, the largest topographic anomaly above sea level on Earth, is important for both its profound effect on climate and its reflection of continental dynamics.

For a new study, Katharine Huntington and colleagues employed a cutting-edge geochemical tool - "clumped" isotope thermometry - using modern and fossil snail shells to investigate the uplift history of the Zhada basin in southwestern Tibet. 


The tectonic plate that dominates the Pacific "Ring of Fire" is not as rigid as most assume, and it's getting less fiery. according to researchers at Rice University and the University of Nevada. 


The makeup of the Earth's lower mantle, which makes up the largest part of the Earth by volume, is significantly different than previously thought.


Global warming has been implicated in many things, it is certainly being implicated in the latest drought in California, the worst since 2002, which was the worst since the early 1990s -and now it is being linked to a change in tectonic plates.

Scientists at Scripps Institution of Oceanography at U.C. San Diego say that the loss of water is causing the entire western U.S. to rise up like an uncoiled spring.


Water has been detected on Mars in the form of permafrost and there is strong evidence that liquid water was a major component of the martian surface in the past.

Clays are an important mineral group for discovering the past on Mars, not only to the presence of water, since clays are hydrous minerals, but they also provide clues as to the source, type, and volume of fluids, along with indications of timescale and mineral alteration. If you are going to search for textural and chemical biosignatures, clay is a good place to start.