Thursday, October 14, 2010

Palaeoclimates

As we are all aware of, our climate conditions are constantly changing. Therefore, different types of rocks or minerals are formed in different environments. The rocks or minerals contain clues about the climatic or environmental conditions under which they formed. These clues help palaeoclimatologists to piece together evidence that certain continent’s climates changed after the split of Pangea.
Evidence for this is that various rocks and minerals are found over different continents. The most significant change is evident in the spread of coal deposits.  Coal deposits found in colder places such as Antarctica suggest to palaeoclimatologists that Antarctica was once a warm environment, since coal is formed under warm temperatures. The idea was that if the continents were joined together, Antarctica would have been closer to warmer latitudes and since the split, spread over to the South Pole where it is colder.

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