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When there is a significant lack of fossil evidence in the Earth's rock beds from a specific time period after 544 million years ago what do scientists believe has taken place?
Wiki User
∙ 14y ago
544 million years ago was the Proterozoic era. This was before visible life on the planet. This long ago the inhabitants wouldn't necessarily leave a fossil. If there is a lack of fossil evidence after this that means there was a mass extinction in this part of the world, and nothing survived to have children to leave fossils. Eventually another species will migrate in but until that happens there would be no fossil evidence.
Wiki User
∙ 14y ago
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It isn't. At least not by Earth scientists! There is no reason based on the evidence to believe that there are significant void spaces (i.e. caverns) within the mantle (despite what you might see in films such as "The Core").
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Why do scientists use specific gravity?
I believe the reason behind using specific gravity is that it is easier to measure (especially when you're measuring it for a solid).
