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Jurassic sedimentary and volcanic rocks (AZJsv;0)
Geologic Formation
in
AZ
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Lithology
Conglomerate
Sandstone
Siltstone
Other
(280 mi²)
Geologic Age
Bajocian – Tithonian (170 Ma – 150 Ma ago)
Geologic Unit Label
Jsv
Sandstone and conglomerate derived from volcanic rocks with associated intermediate-composition lava flows, breccias, and tuffs. In southern Arizona this unit includes rocks of the Artesa sequence, Pitoikam Formation, Mulberry Wash volcanics, Rudolfo Red Beds, Recreation Red Beds, and Gardner Canyon Formation. In western Arizona it includes the Harquar Formation, rocks of Slumgullion, and related(?) unnamed units in the Kofa and Middle Mountains. This unit is characterized by maroon, brown, and purplish-gray volcanic-lithic sandstone and siltstone, with subordinate to abundant conglomerate, quartz-rich sandstone and sparse limestone. (150-170 Ma)
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Geologic Formation
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