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Rock Formations

Measure

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Temperature

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Early Tertiary to Late Cretaceous granitic rocks (AZTKg;0)

Geologic Formation in AZ, CA

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Lithology

Geologic Age

Campanian – Ypresian (82 Ma – 50 Ma ago)

Geologic Unit Label

TKg

Porphyritic to equigranular granite to diorite emplaced during the Laramide orogeny. Larger plutons are characteristically medium-grained, biotite +/- hornblende granodiorite to granite. Smaller, shallow-level intrusions are typically porphyritic. Most of the large copper deposits in Arizona are associated with porphyritic granitic rocks of this unit, and are thus named ‘porphyry copper deposits’. (50-82 Ma)

— USGS

Lyelliceratidae FAMILY

Omphalotrochus cochisensis SPECIES

Glyptospira huecoensis SPECIES

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Early Tertiary to Late Cretaceous granitic rocks (AZTKg;0)

Early Tertiary to Late Cretaceous granitic rocks (AZTKg;0)

Early Tertiary to Late Cretaceous granitic rocks (AZTKg;0)