Geology news

Plates, Missing Ice and Manatees

Plate Tectonics has been revised to some degree in a new study - using computer simulation of the process over millions of year, achingly slowly, one inch at a time - see ... the research came about after observation of rocks in the alpine region of Italy and the mountains of Turkey. It seemed to their surprise that rocks on their way to subduction already showed signs of breakup prior to the actual break up of the plates as they started to bend downwards.

More on Unlikely Fossils

At ... a fossilisation of two fighting mammoths is the story line. The fossil is described in a new book, 'Locked in Time: animal behaviour unearthed in 50 extraordinay fossils' published by Columbia University Press:May, 2021 - see ... one for the coffee table.

Expanding Earth Model

Although some scientists still think in terms of an expanding earth model in opposition to the Plate Tectonics theory they are in no way united in how such a model might work. Robert sent in some links on the subject - including ... which is useful for anyone who wants to read up on the subject. There is also a page on dinosaurs and gravity, which others might be interested in. The dinosaur and gravity theory is all about how these great big  lumbering giants were able to move their bodies around as modern animals do not reach such a size.

Amazing Fossil

This fossil is really amazing, if the reconstruction of what occurred is correct. How do uniformitarians cope with it - see ... well, they cope by saying the remains sunk to the sea bed where they were buried in sediments. In other words, the immediacy of the fossilisation process is compromised. What we have is one creature in the process of being eaten by another when the latter had a big chunk bitten out of it by a third party, a predator such as a shark.

Climate Clues

At ... a 50,000 year history of changes in the Atlantic Meridional Overturning Circulation [AMOC] has been achieved via sediment cores taken off the coast of western France. The record is said to show the current moved fster during warmer periods and languished during colder phases of the Late Pleistocene. However, it was already well known that climate fluctuated as a result of cooling Heinrich events and warming Dansgaard Oeschger events, which seem to follow a regular cycle.

Petrified Candles

Sent in by Robert. At ,,, petrification is a process by which organic material is gradually turned into stone. It is mostly associated with wood. Tree branches and trunks for example found in ancient sedimentary layers - be it sand based, silt, gravel mixes etc. It is mostly associated with ancient geological layers - such as the Jurassic. However, it seems petrification can also occur fairly quickly - and how do we know how long it took ancient wood, for example, to be petrified.

A piece of petrified wood with big implications

William sent in the link to this story at ... and see also ... a rock found in central Mississippi has intrigued geologists. It is actually a piece of petrified wood - wood turned into stone. It was found deep in the ground, in sediments, including gravels, that are thought to be 100 feet deep. Naturally, the wood was dated to the time when the sediment was laid down, during the Pleistocene.

Laramide Orogeny

International Geology Review volume 46 [2004] page 833-838 - the Laramide Orogeny  occurred during Late Cretaceous to Paleocene [80 to 55 million years ago]. You may not that it  encompasses the Cretaceous/Tertiary [or Paleogene] boundar event. One might wonder if the asteroid that was responsible for killing the dinosaurs was also responsible for the Laramide Orogeny, a mountain building episode in North America. It includes the Rocky Mountain fold and thrust belt in Canada and the US. It post dates the Jurassic era - that much is certain.

Melting the Crust of the Earth

Melting rocks require a lot of heat, one might think, or seismic reaction to outward forces - but see ... which is a story that unsettles your average uniformitarian rendition of events in the past. Geologists have been probing a mysterious piece of earth's crust that has largely avoided pigeon holing. A great belt of igneous rock strata stretches some 2000 miles from British Columbia in Canada to Sonora in Mexico, by way of Idaho, Montana, Nevada and Arizona.

Intrusions in Diamonds

Jewellers consider intrusions in diamonds a blemish - and they fetch a much lower price than diamonds that gleam more brightly. Geologists, on the other hand, are interested in the intrusions - minerals that got into the diamonds at some point during the process that made the diamonds. It is in fact a crucial factor as far as Plate Tectonics are concerned - or could be if one or two geologists made a point of pointing out that it contradicted the mainstream geological mantra. See ...