When does the "geochronological clock" begin for a mineral or fossil when the mineral grows or when the organism dies? Group of answer choices A) Minerals and fossils have no daughter isotopes within them, so the ratio between parent and daughter isotopes remains stable until the time the clock starts. B) Some minerals incorporate the radioactive isotope into their crystal structure when they grow, but do not incorporate any daughter isotopes. C) Minerals are different from fossils in that their "clock" begins when the mineral has been fully formed, whereas the "clock" in fossils starts when the organism is alive. D) Most minerals incorporate the stable daughter isotope into their crystal structure when they weather, but do not incorporate any parent isotopes.
When does the "geochronological clock" begin for a mineral or fossil when the mineral grows or when the organism dies? Group of answer choices A) Minerals and fossils have no daughter isotopes within them, so the ratio between parent and daughter isotopes remains stable until the time the clock starts. B) Some minerals incorporate the radioactive isotope into their crystal structure when they grow, but do not incorporate any daughter isotopes. C) Minerals are different from fossils in that their "clock" begins when the mineral has been fully formed, whereas the "clock" in fossils starts when the organism is alive. D) Most minerals incorporate the stable daughter isotope into their crystal structure when they weather, but do not incorporate any parent isotopes.
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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Question
When does the "geochronological clock" begin for a mineral or fossil when the mineral grows or when the organism dies?
Group of answer choices
A) Minerals and fossils have no daughter isotopes within them, so the ratio between parent and daughter isotopes remains stable until the time the clock starts.
B) Some minerals incorporate the radioactive isotope into their crystal structure when they grow, but do not incorporate any daughter isotopes.
C) Minerals are different from fossils in that their "clock" begins when the mineral has been fully formed, whereas the "clock" in fossils starts when the organism is alive.
D) Most minerals incorporate the stable daughter isotope into their crystal structure when they weather, but do not incorporate any parent isotopes.
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