The Pleistocene-Holocene Pinacate volcanic field encroaches on the Gran Desierto of Sonora, Mexico. Pinacate volcanism is monogenetic and has been intermittently-continuous since initiation in the early … Discover (and save!) your own Pins on Pinterest Apollo 14's Alan Shepard and Ed Mitchell, and Apollo 17's Jack Schmitt trained here in Feb. Rocks of the Organ Pipe-Pinacate region have been faulted and eroded into mountains and basins typical of the Basin and Range Province of SW North America. Here we reconstruct one of the youngest eruptions in the Pinacate volcanic field (Sonora, Mexico) and estimate the volumes of the lava flows, scoria cone, and tephra units. English: The Pinacate volcanic field is a roughly 55 x 60 km area containing numerous maars, tuff rings, and cinder cones in NW México near the head of the Gulf of California. The Pinacate Peaks (Sierra Pinacate, O'odham: Cuk Doʼag) are a group of volcanic peaks and cinder cones located mostly in the Mexican state of Sonora along the international border adjacent to the U.S. state of Arizona, surrounded by the vast sand dune field of the Gran Desierto de Altar, at the desert's southeast. The Pinacate volcanic field is a roughly 55 x 60 km area containing numerous maars, tuff rings, and cinder cones. The Pinacates (the name means stink bug!) Here we reconstruct one of the youngest eruptions in the Pinacate volcanic field (Sonora, Mexico)and estimate the volumes of the lava flows, scoria cone, and tephra units. Excavating a crater like the one pictured requires Herculean energies; that hole once held half a billion tons of rock and gravel that was ejected by steam explosions. The field is prominent in satellite photos of this arid region of NW México near the head of the Gulf of California. I reconstructed the third youngest eruption in the PVF. Here we reconstruct one of the youngest eruptions in the Pinacate volcanic field (Sonora, Mexico) and estimate the volumes of the lava flows, scoria cone, and tephra units. This giant maar-caldera and the trachyte shield volcano on the horizon are two of the features that make what Sykes called "The Pinacate Lava Fields” extraordinary. Most of the rock fell into the space formerly occupied by gravel beneath the flows. The source vent of the eruption is Tecolote volcano (27 ± 6 ka, 40 Ar/ 39 Ar). This booklet is your field guide to the geology of these splendid desert landscapes. The cones are monogenetic, each is the product of a single, short eruption of a unique batch of magma that produced less (usually much less) than a tenth cubic km of rock. The field comprises 2,000 km2 of basaltic volcanic rocks. Location. The field covers an area of about 60 x 55 km and has been active less than 10,000 years ago. The source vent of the eruption is Tecolote volcano (27 ± 6 ka, 40 Ar/ 39 Ar). The volcanic cinder cone field stains the landscape of bright sand and tall dunes in the El Pinacate y Gran Desierto de Altar Biosphere Reserve. Thumbnail Medium Original. Tecolote appears to have melted internally but I’ll be damned if I know how. P-47415 September 19, 1996 This spaceborne radar image shows the Pinacate Volcanic Field in the state of Sonora, Mexico, about 150 kilometers (93 miles) southeast of Yuma, Arizona. This website is my Pinacate book. Pinacate is a 1500 km oval of Lower Sonoran Desert covered with lava flows and cinders of more than 450 small volcanoes distributed across the area. These volcanoes are monogenetic; a type of volcano produced by single, short duration (<< 10 years) eruptions that use up all of their modest magma bodies. The field today is part of El Pinacate and Gran Desierto de Altar Biosphere Reserve and is a UNESCO World Heritage Site. Most of the round dark spots are cinder cones, and the six larger circles (many with bright sand on their floors) are a special kind of volcanic crater called maars. It is a kilometer-tall Cerro (mountain) rather than Sierra (range) dotted with younger cone volcanoes like Pinacate Peak, the highest point in the field. These magmas were evolved from basalt by fractional crystallization and constitute the entire alkaline rock series from basalt to trachyte. The Pinacate volcanic field is located in northwestern Sonora, Mexico, near the northern end of the Gulf of California. NASA sent astronauts here starting in 1965 for geologic training, given the similarity of the terrain to the lunar surface, and included training models of lunar surface equipment. Image is centered at 31.84˚N, 113.47˚W. Determining the 40 Ar/ 39 Ar ages of young basaltic volcanic rocks is complicated by many factors, including the possible presence of excess argon and low potassium content. The Pinacate Peaks lie just north of the fishing resort of Puerto Peñasco. This volcanic field extends over an area of nearly 600 square miles between the Gulf of California and the International Boundary, and a small part of it projects northward into Arizona. Dan Lynch’s love affair with the Pinacate Volcanic Field – Pinacate in Stereo. This is an active volcanic field and future eruptions are anticipated. Pinacate has three giants that rival anything in Africa as well as a bunch of smaller ones. NOTE: In a previous version of this post, I featured the EO-1 ALI image below, and an astute reader pointed out that these peaks, while in the Biosphere Reserve, are not Pinacate Peaks, but rather the Sierra de Rosario range nearby. The United States/Mexico border runs across the upper right corner of the image. The Pinacate Peaks (Sierra Pinacate, O'odham: Cuk Doʼag) are a group of volcanic peaks and cinder cones located mostly in the Mexican state of Sonora along the international border adjacent to the U.S. state of Arizona, surrounded by the vast sand dune field of the Gran Desierto de Altar, at the desert's southeast.[1]. False-color … Maar-calderas created by steam activity are common enough to be considered major features of monogenetic volcanic fields; sixteen of those "Fifty Fields" have them. 1970. The tallest of the peaks is Cerro del Pinacate (also called Volcan Santa Clara), elevation 3,904 feet (1,190 m). One of the small cones, Tecolote, is unique in the world. Part of El Pinacate y Gran Desierto de Altar Biosphere Reserve — Sonora. The field covers 1800 km2 of desert. Space Radar Image of Pinacate Volcanic Field, Mexico This spaceborne radar image shows the Pinacate Volcanic Field in the state of Sonora, Mexico, about 150 kilometers (93 miles) southeast of Yuma, Arizona. Padre Eusebio Kino, founder of many Spanish missions in the Sonoran Desert, explored here in 1698 and several times later. Strong sulfur fumarole activity followed the bomb eruption, indurating some of the bomb-covered surfaces solidly enough to hold vertical scarps when the cone melted and the surface cracked apart along a profusion of faults. The trachyte shield could be called a point-source volcano because its low viscosity magmas seem to have erupted through a small summit conduit system and flowed easily outward and downslope to build a volcanic shield. The crest of the East Ridge subsided into a graben, and three valleys formed in the South Wall, each at the head of a short lava flow. Pinacate’s volcanoes are all on continental crust of the Southern Basin & Range geologic province; a colorful background of preCambrian gneisses, Permian and Laramide granites, and mid-Tertiary andesites. There were two distinct episodes of tephra production, Tephra Unit 1 (T1)followed by Tephra Unit 2 (T2). While a milestone that was not the culmination of his love affair with the Pinacate volcanic field. Detailed Description. Monogenetic volcanic fields of Quaternary age like this one are scattered across all the tectonically active regions of the Earth; more than fifty lie within 1000 km of Pinacate. The field comprises more than 300 small basaltic volcanoes - cinder cones and maars. The Mexican Spanish word pinacate is derived from the Nahuatl word for the endemic desert stink beetle, pinacatl. The Pinacate volcanic field (PVF), located in the El Pinacate y Gran Desierto de Altar Biosphere Reserve of Sonora, Mexico, comprises a 1,500 km2 area of Pleistocene lava flows and contains nearly 400 cinder cones and eight maars. From space its a landmark at the head of the Gulf of California. The United States/Mexico border runs across the upper right corner of the image. The source vent of the eruption is Tecolote volcano (27 ± 6 ka, 40Ar/39Ar). U.S. National Aeronautics and Space Administration. [5], El Pinacate y Gran Desierto de Altar Biosphere Reserve. NASA Information and Satellite Image: Pinacate Mountains, http://www.biology.ed.ac.uk/research/groups/jdeacon/desertecology/pinacate.htm, http://www.desertinvasion.us/areas/pinacate_res.html, Official Pinacate y Gran Desierto de Altar Biosphere Reserve website, Global Volcanism Program: Pinacate Mountains, https://en.wikipedia.org/w/index.php?title=Pinacate_Peaks&oldid=929892691, Articles containing O'odham-language text, Articles containing Spanish-language text, Creative Commons Attribution-ShareAlike License, This page was last edited on 8 December 2019, at 22:52. In addition, there are a number of maar volcanoes, the most prominent of which is the Elegante Crater. The field includes one large shield volcano and several hundred cinder cones and associated lava flows. The field today is part of El Pinacate and Gran… Among the youngest lava flows of the Pinacate volcanic field, Sonora, Mexico, is a large outpouring of tholeiite, the Ives flow. Pinacate volcano is a young volcanic field of maars, tuff rings, more than 500 basaltic cinder cones in the Sonoran desert in NW Mexico, a nearly unpopulated region between Arizona and the Gulf of California. The Pinacate Volcanic Field Extraordinary basalt volcanism in Northwestern Sonora, Mexico This giant maar-caldera and the trachyte shield volcano on the horizon are two of the features that make what Sykes called "The Pinacate Lava Fields” extraordinary. Pinacate Volcanic Field, Mexico. The volcanoes here have erupted here sporadically since about 4 million years ago, probably in association with the opening of the Gulf of California. Pinacate volcan cinder cones 1200+ m / 3,937 ft Northwestern Mexico, 31.77°N / -113.5°W Condition actuelle : normal / en sommeil (1 sur 5) | Reports Pinacate livres [ afficher la carte Tecolote volcano, Pinacate volcanic field (Sonora, Mexico): A case of highly explosive basaltic volcanism and shifting eruptive styles April 2019 Journal of Volcanology and Geothermal Research 379 Pinacate Peak in the distance caps the Santa Clara shield volcano, which is dotted with many … Pinacate volcano is a young volcanic field of maars, tuff rings, more than 500 basaltic cinder cones in the Sonoran desert in NW Mexico, a nearly unpopulated region between Arizona and the Gulf of California. The Pinacate Desert is home to the largest sand dunes of the Americas. Copyright ©2013 by Dan Lynch, geologist, beholden to nobody. Volcanic Field James T. Gutmann The Pinacate is a special place thanks largely to its geology. 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