Geology news

Glaciers

At http://researchnews.osu.edu/archive/greenmelt.htm has a story on Greenland glaciers - and what lies beneath them. The research is of course AGW orientated, but useful - the role of water flowing beneath the glaciers. They have found that such water has little actual influence on ice loss around the coast - which is caused by inter-action with the ocean.

Lava, climate change, and amber

Science Daily April 7th (www.sciencedaily.com/releases/2010/04/100406142602.html ) new research suggests the Columbia Plateau in the NW of the US was formed by a series of lava flows - and these happened much more quickly than previously imagined. It may even have changed earth's climate and caused some fauna and flora to become extinct.

Mid Pliocene

The Daily Galaxy, March 31st (www.dailygalaxy.com) ... prehistoric fossils from a geological period, the mid-Pliocene (3.3 to 3.0 million years ago) that was apparently very warm, are being used to demonstrate how AGW will affect the earth in the future. No surprises there as the research was probably funded in order to find such a link with global warming - and therefore a gloss on that subject was a necessary feature of the findings.

Ice Ages in the early history of the earth

Getting back to March 31st 2010 www.physorg.com/print189258390.html another geologist claims to have solved a mystery - why earth's surface was not a big lump of ice four billion years ago when radiation from the sun was thought to have been weak. Previously, scientists had assumed the atmosphere then consisted of 30 per cent C02 trapping heat like a greenhouse (but see Peter Warlow's talk at the SIS Autumn Meeting a couple of years ago).

Hole in the Ground

BBC News March 24th ... deforestation has revealed what might be a giant impact crater in central Africa - in the Democratic Republic of Congo. The findings of an Italian researcher was presented at a Lunar and Planetary Science Conference in Texas and the shape of the crater is clearly visible from satellite imagery. It is unlikely to be recent as part of the structure has been eroded but future study on the ground is planned in order to place a date on the crater.

Plates and Tectonic Activity

At www.physorg.com/print188500078.html March 22nd ... a new model of the earth which took 20 years to construct offers a precise description of the relative movements of 25 interlocking tectonic plates over 95 + per cent of the surface of the planet. The model can be used to predict plate movement relative to any other plate. It is remarkably simple in a mathematical way, the research offers.

Triassic Boundary

www.physorg.com/print188488094.html March 22nd ... 200 million years ago most land on the planet was consolidated into a single continent - Pangea. There was no Atlantic Ocean and the animal world was dominated by creatures related to modern crocodiles. Their world was transformed after what appears to have been a huge catastrophe involving massive and widespread volcanic activity which in turn led to a spike in atmospheric greenhouse gases that wiped out half of the plant species and brought the Triassic to an end.

Antarctic Fossils

Daily Galaxy, March 22nd (see www.dailygalaxy.com ) ... a team working in an ice free region of high mountains and dry valleys in the Olympus Range in Antarctica last summer discovered a rare trove of perfectly preserved fossils of mosses, diatoms, and astrocods - life forms usually associated with tundra conditions such as exist today on South Georgia. The climate switched from tundra to a deep freeze suddenly, it goes on.

Mammoth Mountain

www.sfgate.com March 8th ... 'Study sheds new light on Mammoth Mountain's age' is not about mammoths but a mountain that has a secondary role as a ski resort. Stanford University geologists say that the mountain itself is an old volcano, 11,000 feet at it's summit and came into being some 68,000 years ago. It formed very rapidly, the story continues, but a string of nearby volcanoes whose eroded domes can be seen as part of the mountain massif, formed less than 9000 years ago - in the Holocene.

Chile Earthquake

www.physorg.com id187271371 March 8th ... the earthquake that struck the west coast of Chile in February moved the entire city of Concepcion by at least ten feet - westward. It also shifted other parts of South America such as the Falkland Isles and Forteza in Brazil/ Beunost Aires moved by an inch while Santiago in Chile moved 11 inches WSW. The cities of Valparaiso and Mendoza in Argentina were also moved significantly - and how do they know. GPS satellite technology.