Geology news

Loki's Castle

At http://phys.org/print294650860.html ... in 2008 Norwegian scientists discovered Loki's Castle, a field of five active hydrothermal vents on the Mid Atlantic Ridge between Norway and Greenland. IN association with Loki's Castle are rich metal deposits - and a unique biology. In the seas west of Norway there are volcanoes and active earthquake zones, assumed to be part of the process of Plate Tectonics. Hydrothermal vents churn out hot water - at up to 360 degrees Celsius. No wonder climate scientists, and the Met Office people, think global warming is hiding in the oceans.

Geological Oddities

At http://malagabay.wordpress.com/2013/07/21/geology-mind-the-gap/ ... is another amusing post from Tim Cullen with a sarcastic take on geology as it is presented by mainstream academia. In this instance the focus is on stratigraphy - but whether you fall for it or not it is still something to think about as many a true word is said in jest. Min the Gap is a reference to the fact the sedimentary record is incomplete - vastly so. There are gaps - even Charles Darwin told us about those gaps.

Man Made Earthquakes

One of the more recent scare stories circulated by environmentalists as an anti-fracking tactic, is the idea of humans causing earthquakes - a theme of a recent post. In this one the evidence comes from a geological source, at www.usgs.gov/blogs/features/usgs_top_story/man-made-earthquakes/

Melting ice sheets - the Antarctic

This is not climate related, as such, but a geological conumdrum - see www.sciencenews.org/view/generic/id/351788/description/News_in_Brief_Mil... ... this happened in the Pliocene, which in geochronology directly precedes the Pleistocene and as a result of uniformitarianism is duly dated millions of years ago. The evidence of ice melt in Antarctica comes from sea floor sediments 300+km from the continent. The sediment core was rich in algae, a sign the ocean was warm.

Sea Level - problems associated with calculations

At http://malagabay.wordpress.com/2013/07/13/the-inflating-earth-sea-level/ ... Tim Cullen takes a look at sea levels in the context of the Inflating Earth hypothesis. What he says is interesting to all geologists and anyone else that might have faith in the science involved. Local mean sea level is defined on the height of the sea with respect to a land benchmark, averaged over a period of time, long enough that fluctuation caused by waves and tides are smoothed out.

Silica and Sand formation - an alternative view

In a follow up post on July 3rd Tim Cullen expands further on the geological jigsaw puzzle associated with chalk formation - and includes on this occasion the flints found within the chalk - go to http://malagabay.wordpress.com/2013/07/03/the-chalky-cretaceous-2-the-ey...

The Chalky Cretaceous

It's a fact that chalk formed extensive beds in the Cretaceous but nowhere in the world is there evidence of chalk being formed today. Limestone, which is closely related to chalk, being formed also of the shells of marine life, was generally laid down earlier than the chalk. For example, the limestone rocks of the Peak District and the Yorkshire Dales is derived from former coral reef systems when Britain was situated in warmer climes.

The story of the Chalk ... gets more intriguing as time goes by

At www.geneticarchaeology.com/research/Chalking_up_a_marine_blooming_alga_G... ... chalk deposits are formed from the white shells that envelop single celled photosynthetic alga known as Ehux, a coccolithopare with an exo skeleton made of calcium carbonate. Ehux, and related life forms, are the bedrock of most ocean food chains. Phytoplankton biomass exceeds that of all marine animals combined.

New subduction zone is forming off the coast of Portugal

Well, that is the headline at http://phys.org/print290673740.html .... but it emerges that what has been found is an active tectonic zone to the west of Portugal - or rather, a reaffirmation that a fault line exists out in the sea which was responsible for the 1755AD Lisbon earthquake and tsunami.

The Inflating Earth and Gravity

The last of the three posts goes where it naturally weaves a path - http://malagabay.wordpress.com/2013/06/16/the-inflating-earth-4-gravity/ .... and leads from the equatorial bulge to the question of gravity. For this he goes to www.dinox.org which I mentioned a couple of days ago, the web site of Stephen Hurrell (dinosaurs and the expanding earth) - so you can have two bites of the same cherry.