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MAP

Topo

Rock Formations

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Topo

Ecoregions

Public Lands

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BASEMAPS

Default Weather

Temperature

Smoke

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WEATHER

Tertiary intrusive rocks of intermediate to silicic composition (NMTi;0)

Geologic Formation in NM, AZ

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Lithology

Mafic

Geologic Age

Eocene – Pliocene (56 Ma – 2.58 Ma ago)

Geologic Unit Label

Ti

Includes monzonitic to granitic plutons, stocks, laccoliths, and porphyritic dikes in deeply eroded magmatic centers; and andesitic, dacitic, or rhyolitic plugs and dikes near cauldrons or stratovolcanoes. In the Latir field, fine-grained rhyolitic dikes commonly cut coarse-grained granitic plutons. Includes alkaline laccoliths, plugs, and dikes in Colfax County. North-trending dikes near Capitan include some mafic diabase dikes.

— USGS

Taxonomy

Classified As

Geologic Formation