Geology news

Naples

Meanwhile, Scientific American asks - will Italy's supervolcano erupt soon?(sent in by Jovan) - go to www.scientificamerican.com/article/will-italy-rsquo-s-ominous-supervolca... .... this question  comes a few weeks after an 11 year old boy ventured on to an old volcano near Naples and fell into a fissure. His parents tried to pull him out but floor of the crater crumbled and they all died - watched by a younger child.

Old Faithful

The Old Faithful geyser in Yellowstone National Park attracts millions of visitors ( see https://phys.org/print426478631.html ... but little is known about the geology of the Park - or the fluid pathway from below the surface. This has now been rectified to a certain degree as University of Utah earth scientists have mapped some of the geology following a seismic survey (and is published in Geophysical Research Letters, Oct 2017).

Slabbing

An article in Scientific American covers the same ground as a press release reported here a week or so ago - see www.scientificamerican.com/article/scientists-closing-in-on-the-dawn-of-... ... which tells us geologists have been comparing early Earth with Iceland - where black lava fields stretch as far as the eye can see and beaches with black sand can be found. Black rocks and black sand can be seen elsewhere of course, with an origin in volcanic lava eruptions.

Ice Sheet Yukon

At https://phys.org/print425033494.html ... in the first paragraph we learn the Mackenzie Trough westwards, including the Yukon part of the continental shelf system, is being researched in order to understand glaciation in north west Canada during the Late Glacial Maximum (and the events that brought it to an end). We are told, 'scientists have had to speculate on the extent and timing of glaciation because they've never been out there with equipment to collect data'.

Great Oxidation Event

Gary sent in this link to www.dailymail.co.uk/sciencetech/article-4895642/Crust-change-billions-ye... ... changesin Earth's crust 2.4 billion years ago increased oxygen levels in the atmosphere and triggered an explosion of life. Oxygen increased 10,000 times over within a period of 200 million years (or that is the estimate in uniformitarian time scales). It sounds like that might need modifying.

big hole in Yakut land

Gary sent in the link to https://www.sciencealert.com/siberia-s-huge-doorway-to-the-underworld-is... carcasses ... Siberian permafrost has been cracking open again, it is said, and one of the craters is growing so rapidly it is uncovering long buried forests and carcasses of dead animals such as musk ox and mammoth.

Hot Spots

At https://phys.org/print422274566.html ... Rice University geophysicists have developed a method that uses the average motion of hot spots to determine how fast plates are moving. Hot spots are thought to lie along plate boundaries - but not universally as some hot spots occur inside plates (rather than at margins). What does this mean?

lithosphere research

At https://phys.org/print421653227.html ... researchers at the University of Southampton have been looking at the thickness of Earth's continents (results published in the journal Science) by using seismic reflections to gain a better understanding of craton boundaries. The Earth's lithosphere includes the oceans, crust, and portions below this, which sit upon the Mantle. The lithosphere includes the continents - but how thick are they? They mkae use of seismic waves generated naturaly by hundreds of earthquakes.

Magnetic stripes

Peter M James has a new article at www.ncgt.org June issue. He has been a long time critic of Plate Tectonics and notes that over the last 50 years there has been a lot of criticism of the hypothesis by geologists, admittedly a minority, but this has had little impact. He adds that critical importance is no doubt related to the fact that the mechanisms involved in the mobilist mainstream model are still of unknown magnitude and/or are taken to act at unknown depths, beyond the gaze of the critics (and the proponents).