Covid-19 has significantly affected our fundraising. The Indian Pass and Picacho Peak study areas comprise approximately 33,640 acres and 5,450 acres, respectively. The Picacho Mountains consist largely of a compositionally diverse suite of Laramide to middle Tertiary biotite granite, muscovite granite, and heterogeneous to gneissic granite (Yeend, 1976; Johnson, 1981a, b; Rehrig, 1986; Richard et ai., 1999). For more information about items in this collection, please contact azgs-info@email.arizona.edu. Picacho Peak, located south of the south end of the range, is also surrounded by alluvium, and consists of … These rocks are common near core-complex-related detachment faults at Picacho Peak and the Harcuvar Mountains and in listric-faulted terrain at the Vulture Mountains. ID #10039658, MRDS ID #M050598. Picacho Peak State Park is a popular destination for hiking, wildflower viewing and geology. (1967) General Geology of the Picacho Peak area, MS thesis, University of Arizona; MRDS Dep. 3 and in the NW¼ sec. At the southern end of the range, most ofthe crystalline rocks have been affected by middle Tertiary mylonitic deformation. Geologic Field Guides to the Southeastern Picacho Mountains and Picacho Peak, Pinal County, Arizona The Picacho Mountains are a north-south trending mountain range in southeastern Arizona that is completely surrounded by Quaternary alluvium. Picacho Peak Claim Map. document archiving, management and discovery. Different Picacho Peak, located south of the south end of the range, is also surrounded by Quaternary alluvium. They were so beautiful! Picacho, now a ghost town, was an early mining town on the Colorado River. It was named Picacho (Spanish for "big peak") after a nearby mountain of the same name.. Picacho Mountains, Picacho Mining District, Pinal Co., Arizona, USA : SUPPORT US. October 18, 2012 | Picacho Peak, Arizona | A panoramic view from the main saddle below Picacho Peak, looking north into Picacho (left) and Avra (right) basins, separated by Picacho Mountains. The peak is over 9 million years old, even older than the Organ Mountains that tower to the east. The Picacho Mountains are a north-south trending mountain range in southeastern Arizona that is completely surrounded by Quaternary alluvium. See the guide for detailed descriptions. Geology Even though bizarre-looking Picacho Peak looks much like a volcanic neck, it is actually the faulted, tilted and eroded remains of a sequence of lava flows, except for the summit, which contains a large block of Precambrian granite. Picacho Peak … The Picacho Mountains are the light-colored hills directly across I-10. Earth fissures occur in the Picacho Peak area due to groundwater withdrawal and soil compaction. Before you hike, be prepared with enough water and proper footwear as the trails are steep and challenging. Picacho Peak, located south of the south end of the range, is also surrounded by Quaternary alluvium. The crystalline rocks of the Picacho Mountains are part ofthe footwall of a south- to southwest-dipping detachment fault that is exposed only at the base of a small klippe of volcanic rock on a hill top in the southeastern Picacho Mountains. It is a volcanic mountain composed of rhyolite (mostly quartz and feldspar) that solidified at the surface approximately 35 million years ago. Arizona Geological Survey Open-File Report -12-04. Although closely related geologically, these two mountainous areas consist of completely different rock types. At its peak in the mid 1990s, the Picacho Mine property consisted of 600 acres of fee lands and patented lode claims totaling 1650 acres. The hike to the top of the peak is not too difficult and the views from up there are very beautiful. Picacho Peak Summit Hike - Hunter Trail - Eloy, Arizona This is another one I have had on the radar for a while now. 4 Helpful votes. The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055, Spencer, J.E., Ferguson, C.A. The maps, reports, and other information and content on this website are provided as a public service for informational purposes only. The park is located at the base of Picacho Peak and is dotted with giant Saguaro. The hiking took us 4 hours. The amount of items that will be exported is indicated in the bubble next to export format. Collection: ADMMR | Place Keywords: United States, Arizona, Pima County, Picacho Mine, Comobabi - 15 Min, T16S R4E Sec 7 C, Cababi metallic mineral dist., Ko Vaya Hills physiographic area, Pima89. Learn more about the geology of White Sands National Monument by clicking here. At this point there is a bench looking out, and a small sign with some geology about the mountain, saying it is believed to be a 2 million year old lava flow, far older than the Grand Canyon. The trail continues around a rocky impasse and heads up a wide gully to the saddle between Picacho Peak and Razorback Ridge. AZGS - Picacho Mts. Picacho Peak is composed of multiple andesitic lava flows interbedded with thin sequences of medium- to thin-bedded, well-sorted, medium- to coarse-grained arkosic sandstone and granule sandstone. The recreation area has over 15 miles of mountain biking, hiking, and equestrian trails. AZGS - Picacho Basin Arizona Department of Water Resources, 1999, Third Management Plan for Pinal Active Management Area, 2000-2010: Arizona Department of Water Resources, 438 p. Authors There are several good hiking and walking trails in the area. Please help! 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