Tag Archives: paleotemperature

The Bubbles That Changed our Perspective on the World’s Climate

Facebooktwitterlinkedininstagram

Camp water supply from a small pond on this iceberg

One of my geology field seasons in the Canadian Arctic worked out of a base-camp on Axel Heiberg Island (west of and snuggled against Ellesmere Island).  It was the spring thaw and all rivers and streams were muddy.  Our only source of clean water turned out to be a small melt-water pond atop an iceberg in Strand Fiord, a few hundred metres offshore.  The helicopter would make daily trips with a 45-gallon drum to collect the water.  The ice and its water were crystal clear and probably a few thousand years old. It was a treat. Perhaps the only thing missing was the occasional Scotch or G&T. Continue reading

Facebooktwitterlinkedininstagram
Facebooktwitterlinkedin

Measures of Temperature in the Bowels of the Earth

Facebooktwitterlinkedininstagram

 

Te Puia in central North Island, NZ, a well-known region geothermal activity

We don’t need to look far to see evidence that the interior of the earth is hot; geysers and geothermal power stations tap similar sources of heat and erupting volcanoes represent the end point for magmas journeying from the earth’s mantle.  The same heat sources are responsible for many geological processes. Convection in the mantle is the primary driving force for plate tectonics. Piles of sedimentary strata, commonly 1000s of metres thick are transformed to rock as the fluids within heat up, promoting rock-forming chemical reactions.  Internal heat also transforms organic matter; peat becomes coal and organic-rich shales produce hydrocarbons Continue reading

Facebooktwitterlinkedininstagram
Facebooktwitterlinkedin