GEOLOGY
STRATIGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Temperatures at the South Pole were once much warmer.
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Only a few species of plants used to grow at the South Pole.
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Ancient plants mutated to survive in the cold polar climate of the South Pole.
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Higher levels of carbon dioxide once existed in the atmosphere at the South Pole.
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Detailed explanation-1: -Which can scientists most likely conclude from discovering tropical plant fossils at the North Pole? Temperatures at the North Pole were once much warmer.
Detailed explanation-2: -Today, the South Pole records average winter temperatures of 78 degrees Fahrenheit below zero. But roughly 90 million years ago, the fossils suggest, Antarctica was as warm as Italy and covered by a green expanse of rainforest.
Detailed explanation-3: -Antarctica hasn’t always had the same climate that it has today. In the geological past (many millions of years ago), Antarctica has been much warmer than present, and fossils found in rocks indicate that at various times even trees have covered much of the continent.
Detailed explanation-4: -Abundant finds of fossil leaves and wood point to the existence of extensive forestation in earlier geological periods, even to within a few degrees of latitude of the South Pole itself.