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Geologists cannot date a clastic sedimentary rock directly using isotopic geochronologic methods. Why not? those rocks do not contain the appropriate radio-isotopes O those rocks do not contain the appropriate minerals dates would indicate the times the minerals weathered out of the parent materials rather than depositional age dates would indicate the times the minerals formed in igneous or metamorphic rocks rather than depositional age O the isotopic half-lives are too short

Geologists cannot date a clastic sedimentary rock directly using isotopic geochronologic methods. Why not? those rocks do not contain the appropriate radio-isotopes O those rocks do not contain the appropriate minerals dates would indicate the times the minerals weathered out of the parent materials rather than depositional age dates would indicate the times the minerals formed in igneous or metamorphic rocks rather than depositional age O the isotopic half-lives are too short

Applications and Investigations in Earth Science (9th Edition)
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
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Geologists cannot date a clastic sedimentary rock directly using isotopic geochronologic methods. Why not? those rocks do not contain the appropriate radio-isotopes O those rocks do not contain the appropriate minerals dates would indicate the times the minerals weathered out of the parent materials rather than depositional age dates would indicate the times the minerals formed in igneous or metamorphic rocks rather than depositional age O the isotopic half-lives are too short
Transcribed Image Text:Geologists cannot date a clastic sedimentary rock directly using isotopic geochronologic methods. Why not? those rocks do not contain the appropriate radio-isotopes O those rocks do not contain the appropriate minerals dates would indicate the times the minerals weathered out of the parent materials rather than depositional age dates would indicate the times the minerals formed in igneous or metamorphic rocks rather than depositional age O the isotopic half-lives are too short
Radiocarbon (carbon-14) dating is different from most other numerical dating techniques used by geologists, for a variety of related reasons. Which of these is not one of those reasons? O production rate of C-14 isotopes is somewhat variable in time, requiring calibration of the dating curves O a relatively short isotopic half-life limits the age range that can be assessed O N-14, the parent isotope that is transformed into C-14, is the same as the daughter isotope after its decay O most C-14 isotopes used in dating were created during solar fusion C-14 methods apply to organic materials, rather than rocks and minerals
Transcribed Image Text:Radiocarbon (carbon-14) dating is different from most other numerical dating techniques used by geologists, for a variety of related reasons. Which of these is not one of those reasons? O production rate of C-14 isotopes is somewhat variable in time, requiring calibration of the dating curves O a relatively short isotopic half-life limits the age range that can be assessed O N-14, the parent isotope that is transformed into C-14, is the same as the daughter isotope after its decay O most C-14 isotopes used in dating were created during solar fusion C-14 methods apply to organic materials, rather than rocks and minerals
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