23 resultados para U-Pb and 40Ar-39Ar geochronology

em University of Michigan


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At head of title: Inquiry Reference Service.

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Tree before 1858; boulder ca. 1883; bronze plaque 1904. In spring of 1858 the Class of 1858 named this oak (growing near center of campus) the Tappan Oak as a tribute to then Pres. Henry P. Tappan). Stone was given by the "Tappan Boys" (class of 58) and placed ca. 1883.

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"Electronic resource guide"--P. 36-40.

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Mode of access: Internet.

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"Contract No. AT(40-1)-1399."

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"April 1989."

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"April 1983."