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Showing 1 to 2 of 2 for “"Chief Joseph pluton"”.
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Tertiary Sediments of the Big Hole Valley and Pioneer Mountains, Southwestern Montana: Age, Provenance, and Tectonic Implications
… indicates derivation from the nearby 2-mica Chief Joseph pluton, a predicted ~75 Ma zircon population is not present: instead, a persistent peak of 70-72 Ma zircons is found throughout the basin, indicating the Chief Joseph pluton may have a younger emplacement age than is currently …
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Tertiary Sediments of the Big Hole Valley and Pioneer Mountains, Southwestern Montana: Age, Provenance, and Tectonic Implications
… indicates derivation from the nearby 2-mica Chief Joseph pluton, a predicted ~75 Ma zircon population is not present: instead, a persistent peak of 70-72 Ma zircons is found throughout the basin, indicating the Chief Joseph pluton may have a younger emplacement age than is currently …