Geology news

Interior Seaway

At https://wattsupwiththat.com/2021/09/09/the-creatceous-geology-of-alabama... ... the author, a geologist, comments on an article in Hakai magazine [which you can get to online]. It revolves around a paleontological site in what is now Alabama, some 250 km inland from the Gulf of Mexico. It was of course submerged in the so called period of the Interior Seaway, cutting a swathe across the middle of North America in the Cretaceous period. Gullies of white chalk are said to represent the remnants of the bed of an ancient sea - the remains of an algae bloom.

Alaskan Prime Pastures

At https://notrickszone.com/2021/09/09/scientists-increasingly-agree-the-la... ... scientists have been forced to accept that during the Late Glacial Maximum summers were several degrees warmer than in the modern world. These were endemic to Siberia and Alaska - north of the Arctic Circle. The old view that during the extent of the last Ice Age, or at least from 60,000 years ago onwards, to the beginning of the Holocene, a huge ice sheet covered the northern hemisphere from one end to the other, has been abandoned.

Ice Free Arctic Oasis

At https://sciencenorway.no/arctic-climate-change-forskningno/an-ice-free-o... ... researchers from Norway and the UK have been looking at polynyas - ice free openings between land ice and sea ice. These allowed life to flourish even at the ice sheet edge. They seem to have existed during the Late Glacial Maximum - when ice covered much of Scandinavia, 3 km thick in parts of Norway.

North Sea Ice Age

Willian sent in this link and it opens a fascinating subject. At https://news.yahoo.com/news/north-seas-hidden-ice-age-230234332.html ... a spectacular Ice Age landscape has been revealed beneath the North Sea. Deep, kilometre wide channels gouged out of the sea bed by fast flowing rivers of water - presumed to be melt water from ice. The link has images but for the best set of views go to www.dailymail.co.uk/sciencetech/article-9970017/ ...

Missing Rocks

Robert sent in the link https://thedailyplasma.blog/2021/08/26/cracks-in-theory/ ... and https://www.space.com/grand-canyon-rock-mystery-rodinia .... the first link is to Andrew Hall who posts at Thunderbolts and the second one tells us some interesting facts about the Grand Canyon. Why are some rocks missing from the geological column? It seems they have found a way to explain away the so called Great Unconformity, which was first noted back in the 19th century. The solution found is a series of small faults - with the emphasis on small. They occurred way back beyond - Pangea.

Information gleaned from a small core of rock at Stonehenge

This story is at https://www.livescience.com/stonehenge-pillars-mesozoic.html ... and https://www.sciencealert.com/rediscovered-chunk-of-stone-henge-gives-a-g... ... Back in  1958, during restoration work at Stonehenge, one of the uprights was found to be cracked. Three cylindrical cores were drilled out of the stone. One of them was kept as a souvenir by a chap who later emigrated to the US, taking the core with him. Later, the stone was returned, when he was in his 90s, some 60 years later. It has a tale to tell.

One Billion Years

One Billion Years in 40 seconds -see the video at www.visualcapitalist.com/1-billion-years-of-tectonic-plate-movement/ .. to be precise, one billion years of tectonic plate movement as perceived by earth scientists. A staggering helter skelter view of plates converging and then moving away. Not just post Pangaea but a series of hypothetical movements of the plates prior to that break up. The link was sent in by Robert. Is it proof - or imaginary? As nobody can prove otherwise it is a matter of opinion, even if you sit on the fence.

Geoid Shifting

On the web site of New Concepts in Global Tectonics, you can read all their back issues without charge. For their June 2021 issue go to www.ncgtjournal.com ... and look for volume 9 number 2. It has a very interesting article for anyone interested in maps and continental shelf systems - and former land surfaces. The article is by Masahiro Shiba of the Museum of Natural and Environmental History in Shizouka, Japan. It is fascinating - and one to make you think.

Allabogdanite

Allabogdanite is associated with meteors - see https://phys.org/news/2021-06-mineral-previously-meteorites-dead-sea.html ... allabogdanite has been found in the Dead Sea region. This is an interesting observation as I immediately made a connection with the proposed Sodom meteor towards the end of the MB era. Previously, it was found in the Negev - in surface rocks. These are probably rocks that go back much farther than the Sodom meteor or even Mount Horeb of the Mose story, yet it is an interesting coincidence.

Fagradalsfjall Update

The Fragradalsfjall volcano on the Reykjanes peninsular of Iceland began to erupt in March. It is still ejecting large volumes of liquid basaltic lava - see https://www.volcanodiscovery.com/fagradalsfjall.html  .. and the July issue of 'Down to Earth' magazine [2021]. A live webcam of the volcano is available to view. The editor adds, the eruption continues to come up with surprises and unless and until we begin to see some slight change in the composition of the basalt it may well go on erupting.