Geologic Map of the Ninetysix Hills, Pinal County, Arizona
Dataset Identification:
Resource Abstract:
The Ninetysix Hills of Pinal County, Arizona, consist of a series of low hills and pedimentsituated about half way between
the towns of Florence and Catalina, and are about 70 km (45 mi.) northof Tucson (see figure 1). The low spine of hills is
underlain by at least four separate granitic plutons. Theolder pluton, a coarse-grained K-feldspar megacrystic granite exposed
in the south, is intruded by amedium-grained granite to granodiorite. Both of these units are locally foliated, but have mineralogic
andtextural characteristics that suggest they do not belong to the regional suite of 1.65 to 1.7 Ga-old granites,but are younger.
The quartz-porphyritic Teacup granodiorite (Krieger, 1974a, 1974b, Bradfish, 1979)comprises most of the northern part of the
Ninetysix Hills, and is mapped to the north in the GraybackQuadrangle (Cornwall and Krieger, 1975) and North Butte Quadrangle
(Spencer and Richard, 1997). TheTeacup granodiorite appears to be intruded by a younger, medium- to coarse-grained, slightlyperaluminous
granite that forms the central part of the range.
Citation
Title Geologic Map of the Ninetysix Hills, Pinal County, Arizona
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Metadata contact
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pointOfContact
individual Name Missing
organisation Name
Arizona Geological Survey
position Name missing
Contact information
Telephone
Voice 520.770.3500
Fax 520.770.3505
Address
416 W. Congress, Ste # 100, Tucson, AZ, 85701-1381
Country USA