Fill in the blanks. The words in parentheses represent the choices for each blank. Walter and Luis Alvarez believed that the iridium in the K–Pg boundary layer likely originated from an asteroid, as the element is rarely found in _______ (terrestial, extraterrestial) rocks. Given that iridium levels were _____ (lower, higher) in rock sediments above and below the K–Pg boundary, the scientists concluded that an asteroid likely struck the earth _______ (between the Paleogene and Cretaceous periods, during the Cretaceous period, during the Paleogene period)
Fill in the blanks. The words in parentheses represent the choices for each blank. Walter and Luis Alvarez believed that the iridium in the K–Pg boundary layer likely originated from an asteroid, as the element is rarely found in _______ (terrestial, extraterrestial) rocks. Given that iridium levels were _____ (lower, higher) in rock sediments above and below the K–Pg boundary, the scientists concluded that an asteroid likely struck the earth _______ (between the Paleogene and Cretaceous periods, during the Cretaceous period, during the Paleogene period)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Fill in the blanks. The words in parentheses represent the choices for each blank.
Walter and Luis Alvarez believed that the iridium in the K–Pg boundary layer likely originated from an asteroid, as the element is rarely found in _______ (terrestial, extraterrestial) rocks. Given that iridium levels were _____ (lower, higher) in rock sediments above and below the K–Pg boundary, the scientists concluded that an asteroid likely struck the earth _______ (between the Paleogene and Cretaceous periods, during the Cretaceous period, during the Paleogene period)
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