5

There seems to be indeed reasons to believe in an enhanced volcanism during the Cretaceous at least. The Cretaceous timescale is indeed peppered by the formation of large igneous provinces (known collectively as LIP; short review in Ogg & Hinnov 2012a): Parana at ca. 135Ma, the Ontong-Java Plateau at ca. 125Ma, the Kerguelen Plateau at 118Ma, the ...


3

The rocks that make up Britain have been slowly drifting north over geologic time. About 700 million years ago it was near the South Pole! I paused this Youtube video at 75 mya, held the end of a toothpick over Cornwall, then played it to the end keeping the toothpick steady over that point, under which the approximate location of Bilbao, Spain eventually ...


3

During the cretaceous the earth was on average 4 degrees warmer, but a 4 degree average results in nearly no change at the equator but a significantly higher rise at the poles, 8 to 15 degrees warmer. Antarctica was not covered in an icecap in the cretaceous period, although smaller ones may have formed periodically. Northern antarctica was largely covered ...


2

Estimated sulfur release 325 gigatonnes = 325,000 teragrams. The numbers in this diagram are in teragrams Sulfur Cycle so the release is $\approx 1000\times $ today's annual sulfur cycle. I think most of the sulfur compounds would be washed into the ocean and then deposited into sediments. I can't find how much sulfur is currently in the oceans, this ...


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