Geology news

Plate Tectonics and Tibet

It seems we can be assured that plate tectonics can explain the peculiar geology of Tibet - which must mean some other geologists disagree. The story can be found at www.physorg.com/print218907794.html and concerns a paper in the journal Earth and Planetary Science Letters and the research involved GPS data, the mapping of fault zones, and of course, the inevitable computer analysis.

Fish - builders of the chalk?

A joint UK/US study of ocean sediments off the coast of the Bahamas has come up with some surprising facts. See www.physorg.com/print218289668.html .. published by the PNAS it says that fish are responsible for a lot of the fined grained carbonite in sea bottom sediments, particularly in shallow sea situations. Until now it was thought they were derived primarily from sea-water absorbing C02 or the breakdown of the skeletons of tiny marine invertebrae and algae.

Geology on the Quick

At http://notrickszone.com/2011/01/23/red-sea-about-to-flood-into-africa-as-continent-shatters/ ... the blog of Pierre Gosselin has picked up on a story from the major German daily, Der Spiegel - on a story in which the reporter may have got so used to climate alarmism he thinks geological events take place in weeks rather than millions of years.

Fossilisation

At www.ancientdestructions.com ... Peter Jupp's web site has an excellent article on fossils - from petrified trees (that become agate or chalcedony) complete with beetles and their larvae and the  holes they made when the object was wood rather than stone, to oysters, clams and crabs also made of stone and caught in a moment of collective disorder and distress. In South Dakota the skeleton of a dinosaur was discovered in 1993 and in its chest cavity, in the precise shape and size of its heart, was found an iron concrete ...

Ancient Florida - land where there should have been sea according to the uniformitarian model

At www.news-press.com/apps/pbcs.dll/article?AID-2011110117060 'Ancient plant matter found beneath Pine Island changes Florida history' is about some recently discovered ancient plant remains beneath Pine Island, actually a bed of rock where a sample was taken to a laboratory and it was found to contain pollen and spores dating as long ago as the Eocene (some 35 million years ago).

The Grand Bahamas Bank

At hgttp://geology.com/nasa/great-bahamas-bank/ .... there is a NASA image of the Great Bahama Bank as seen from space. It stretches from near the N American land mass to the south, almost reaching Cuba. The image was taken by the MODIS instrument, a spectroradiometer, from a satellite and picks out beautifully the Bahamas Bank system (see below) which is just 33 feet average depth as opposed to its surrounding waters, or deep water channels, that are thousands of feet deep.

The Drying up of the Sahara

At www.physorg.com/print212152097.html ... a study of lake sediments from a dried up lake in northern Chad in the Sahara has shown evidence that the lake was dessicated by a slow process and progressively, beginning in around 6000 years ago (4000BC) and reaching the present condition around AD900. Geochemical and the analysis of sediments were done on a yearly basis to determine when the Sahara went dry.

Ice Ages

The New York Times (see www.nytimes.com/2010/12/18/world/middleeast/18deadsea.html ) has picked up on the story of the Dead Sea sediment cores that are currently being drilled out of the middle of what is the world's deepest inland basin. The first bore hole is thought to have passed through four Ice Ages, some 400,000 years. The cores will be sent to Germany for analysis so the above date is a bit of guesswork.

A Deep Sea waterway

At http://geology.com/noaa/sulawesi-sea/ .... this is an interesting piece of reseach as the Sulwesi Sea even during the Ice Age was a water-way and a barrier between Sunda Land, the part of Indonesia to the west that was joined up with SE Asia, and the large landmass that comprised Australia (somewhat larger than it is now) and New Guinea - and possibly the Solomon Islands too.

Mars - spreading volcano

At http://specialpaper.gsapubs.org/content/470/115.abstract 'Is Tharsis, Mars, a spreading volcano?' - it is thought Tharsis Rise on Mars is spreading outwards and that has produced rifting at the summit with radial tear-fault systems associated with folding round its periphery. It is said by this geological attempt at understanding the feature to be analogous to a terrestrial mid-ocean ridge - without the corresponding subduction zones.