How much do we know about Stonehenge? Less than we think. And what has Stonehenge got to do with the Ice Age? More than we might think. This blog is mostly devoted to the problems of where the Stonehenge bluestones came from, and how they got from their source areas to the monument. Now and then I will muse on related Stonehenge topics which have an Ice Age dimension...
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Wednesday, 21 August 2013
Sea Ice is rather interesting.....
Came across these two rather nice aerial photos of sea ice off the coast of East Greenland -- just to give us some idea of the almost infinite variety found in nature.
The top photo shows very thin plates of ice -- maybe just a few inches thick -- with rafting occurring under the influence of winds and currents. The slabs are literally sliding over one another.
The lower pic is of old shorefast ice which is breaking up into discrete floes -- this can be a foot or more thick. Note that in some areas there have been so many collisions between the floes that there is a lot of brash ice. But there is no glacier material here. All the ice in both photos has come from the direct freezing of sea water.
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