Catastrophism news

Younger Dryas boundary event again

Dennis Cox at 'A Catastrophe of Comets' - http://craterhunter.wordpress.com/2012/05/06/a-core-project-to-watch/ is all about the hypothetical Younger Dryas boundary event - in this instance, in Mexico and California. A core drilling is now underway in a lake in northern California that may shine light on the period, but the main research of the core into lake sediments is designed to find evidence and predict how flora and fauna coped in the past with major abrupt climate change.

Spherules and Impacts

We are assured by the US Geological Society that spherules in black mats have nothing to do with impacts at the Younger Dryas Boundary but a few days later we have this new paper in Nature (April 25th) - see http://phys.org/print254577289.html. It seems that asteroid/ comet impacts are okay as long as they happened billions of years ago. Jay Melosh focussed on spherules embedded in layers of rock that are said to have been vapourised during an impact collision with the Earth. It expanded as a giant vapour plume that rose into the atmosphere.

Younger Dryas Boundary event debunked once again

At http://phys.org/print254421869.html ... a new study, by the US Geological Survey, claims it has found evidence that elevated levels or iridium, magnetic spherules and titanomagnetic grains, usually thought to be impact markers, have a more than likely terrestrial origin. No comet broke up over North America, they say, but we might ask, is this the kind of evidence we might expect of uniformitarian orthodoxy repudiating the YDB event mainly as it does not equate with their belief system as regards the past history of the Earth, or is this serious scientific scepticism.

Latest on the Younger Dryas boundary event

In Pleistocene Coalition News 4:2 April, 2012, George Howard has a piece on the Carolina Bays and the YDB event. The Bays consist of tens of thousands of shallow, symetrical, elliptical depressions. Some have become ponds and lakes but most are just boggy or have dried out and are common to the eastern seaboard zone of the US but also occur as far west as Nebraska and Kansas. He describes how he first encountered them - as a young researcher working for a local politician who was fascinated by them.

Did volcanic activity trigger the Little Ice Age?

This post can be found at http://wattsupwiththat.com/2012/04/12/trigger-for-little-ice-age-a-half-... is taken from the blog of Roger Pielke Sr and refers to a paper in the Geophysical Review Letters 39, L02708, doi:10.1029/2011 GL050168 by Miller et al. Miller and pals claim a half century of volcanism initiated a chill lasting half a millennium - is this possible?

Carolina Bays (and similar geological features)

At http://cosmictusk.com/Sand-sheets-from-michigan-davias-presentation-to-a... ... Michael Davias is placing a date around 40,000 years ago on the Carolina Bay formation. George Howard makes the point that no single explanation as yet accounts for all the observed characteristics of the Bays.

Corals and the end of the Ice Age

Coral off Tahiti shows a dramatic and rapid rise in sea level of around 14m at 14,600 years ago - at the onset of the Bolling warm period (following the end of the Oldest Dryas event or Heinrich event number One). A similar thing happened at the end of the Younger Dryas event, it is thought - or something very similar. It is being interpreted as evidence of a major mega-flood event, caused by the rapidly melting ice sheets thought to have existed across the top of the northern hemisphere - see www.physorg.com/print252305308.html.

Jupiter and Ammonia

At www.physorg.com/print252331686.html ... computer simulation of the July of 2009 impact event, picked up by an amateur astronomer the following day, has tried to find out what size and composition of object it would have taken to achieve what was observed the day after it happened. The amateur alerted mainstream astronomers and telescopes were turned to fix on Jupiter - so quite a bit of evidence was in fact accumulated.

Napier vindicated

Following on from yesterday (Bill Napier email from 2005) the YD impact hypothesis is revisited at http://craterhunter.wordpress.com/2012/03/16/the-younger-dryas-impact-hy... in which the author begins by saying the team presenting the YD boundary event were not writing from a solid astronomical model - and that is what got them into trouble with the critics. This was because they were relying on Toon et al and the estimate they made that it would take a 4 mile wide bolide to account for a continent wide debris layer.

Bill Napier 7 years ago

Bill Napier, in an email to the Benny Peiser Cambridge Conference Network in 2005 (in reply to criticism of the Clube and Napier model) said, 'so far as I know nobody of status disputes that there was an erstwhile exceptionally large comet in a short period earth crossing orbit in the relatively recent past. In fact, I don't know how it could be disputed since we see the debris in the form of the old massive Taurid meteor stream.