Geology news

Can the Earth's crust move up and down?

This sounds like the sort of thing advocated by Steve Mitchell in the pages of SIS but the story is at www.physorg.com/print221727791.html and derives from a paper that claims the crust can move up and down like a yo-yo. However, it is nothing like the sort of thing suggested by Steve Mitchell as they are referring to plate boundaries - although the idea might possibly be extended to whole sections of plate, assuming plates are not neccessarily huge affairs.

Chesil Beach

At www.jurassiccoast.com/380/the-coast-uncovered-30/geo-highlights-226/ches... ... the Jurassic Coast was featured in BBC TVs Countrywise April 5th 2011 - and Chesil Beach was pictured and discussed. I had a quick look on the Net by search engine and came up with the above site. I can remember reading some years ago a tourist booklet that said the pebble and shingle beach was raised up in a storm.

The Grand Canyon ... again

Sparked by the same article as my post on March 31st, EM Smith at http://chiefio.wordpress.com/2011/04/01/where-did-the-grand-canyon-go/ asks an intriguing question. The aforesaid article says the Colorado River began cutting out the Grand Canyon 17 million years ago - other geologists have suggested 3 or 6 million years. It is 277 miles long, up to 18 miles wide and up to a mile deep - but where did all the material go that got washed away?

Grand Canyon

At http://geology.com/articles/age-of-the-grand-canyon.shtml is an article 'How Old is the Grand Canyon?' which describes some of the conventional thinking on how long it would take a river to cut through so many layers of rock - and millions of years are involved. However, a whole mountain range has apparently disappeared - over the course of the same period of time. The disappearance is equally as mysterious as the formation of the canyon - a great slash cut out of the crust of the earth. It is also clear that science does not really know how it was formed - but ideas abound.

More on those Arctic trees

At www.physorg.com/print219594362.html ... a buried forest was discovered after wood was found on the ground near a glacier. Earth scientist Joel Barker spotted some wood scattered on ground near a glacier and found the remains of trees that had once grown on Ellesmere Island in the High Arctic. Nowadays, the Hazen Plateau in Quttinirpaaq National Park is a tundra and glacier landscape, a pretty desolate kind of place where temperatures regularly fall below 50 degrees of freezing. It is thought the mummified tree remains lived millions of years ago - when the Arctic was warm.

Black Sea Floods

At www.sciencenews.org/view/generic/id/71291/title/Cave_formations_record_B... ... stalagmites in a cave in Turkey not far away from the Black Sea coastline contain a record of 19 flooding events - 0ver 650,000 years. It seems over the course of time a series of floods have drowned the Black Sea and its environs - over and over again (see Nature Geoscience March 13th). In other words, the waters of the Mediterranean seem to have poured into the Black Sea on some 12 occasions and the waters of the Caspian did the same thing on the other 7 occasions. Why? 

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 ...