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In the late 1800's various principles (original horizontality,inclusions,cross cutting relations,etc.arête) were established and used to ________.
Q29: The concepts of "stress" and "strain" are
Q30: For a radioactive isotope like Uranium-235,what does
Q35: Located adjacent to red on the electromagnetic
Q44: The rock formations of the _ era
Q55: The phrase,"The present is the key to
Q64: The Cenozoic era is often called the
Q73: Extensive deposits of _ ore are found
Q74: Oil and gas resources are rare on
Q77: During the Alaskan earthquake of 1964,the buildings
Q80: _ averages roughly 7 km thick.