Copyright ©2013 by Dan Lynch, geologist, beholden to nobody. The field is prominent in satellite photos of this arid region of NW México near the head of the Gulf of California. The shield Volcan Santa Clara is the largest volcano in the field and is pimpled with smaller cinder cones. These magmas were evolved from basalt by fractional crystallization and constitute the entire alkaline rock series from basalt to trachyte. The Pinacate Desert is home to the largest sand dunes of the Americas. In addition, there are a number of maar volcanoes, the most prominent of which is the Elegante Crater. 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. U.S. National Aeronautics and Space Administration. [4], The El Pinacate y Gran Desierto de Altar Biosphere Reserve is a biosphere reserve, in the spanish language Reserva de la Biosfera el Pinacate y Gran Desierto de Altar, managed by the Mexican Federal Government's SEMARNAT - the Ministry of the Environment and Natural Resources, in collaboration with the government of the State of Sonora's IMADES agency. The field comprises 2,000 km2 of basaltic volcanic rocks. At its core lies the Sierra Pinacate, a central massif of old lava flows that is mantled with and surrounded by younger flows and cinder cones. All of the Pinacate magmas came through at least some ground water under the field but only about a dozen out of 465 eruptions even noticed the water and interacted with it. Pinacate Peak in the distance caps the Santa Clara shield volcano, which is dotted with many … The Pinacate volcanic field is located in northwest Sonora, Mexico, and comprises a 1500 km 2 area of lava flows with over 400 scoria cones and 8 maars (Gutmann, 2007) . The United States/Mexico border runs across the upper right corner of the image. The tallest of the peaks is Cerro del Pinacate (also called Volcan Santa Clara), elevation 3,904 feet (1,190 m). The Pleistocene-Holocene Pinacate volcanic field encroaches on the Gran Desierto of Sonora, Mexico. Located in far northwest Sonora, Mexico, the Pinacate volcanic field comprises a 1,500 km2 area of Pleistocene lava flows with over 400 cinder cones and 8 maars. Tecolote appears to have melted internally but Iâll be damned if I know how. This rugged volcanic terrain made the Pinacate a … Dan Lynch’s love affair with the Pinacate Volcanic Field – Pinacate in Stereo. 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. The field includes one large shield volcano and several hundred cinder cones and associated lava flows. This is an active volcanic field and future eruptions are anticipated. The Pinacates (the name means stink bug!) The field covers an area of about 60 x 55 km and has been active less than 10,000 years ago. The most recent volcanic activity was about 11,000 years ago. Image is centered at 31.84˚N, 113.47˚W. Among the youngest lava flows of the Pinacate volcanic field, Sonora, Mexico, is a large outpouring of tholeiite, the Ives flow. The crater rim in the center of the photo is that of Crater Elegante, a 1.6-km-wide maar. Pinacate volcanism is monogenetic and has been intermittently-continuous since initiation in the early … While a milestone that was not the culmination of his love affair with the Pinacate volcanic field. 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. The larger circular craters seen in the image are a type of volcano known as a "maar", which erupts violently when rising magma encounters groundwater, producing highly pressurized steam that powers explosive eruptions. This website is my Pinacate book. The pockmarked terrain of Pinacate National Park in Mexico's Sonora Province is evidence of a violent past. Thumbnail Medium Original. Pinacate Volcanic Field, Mexico. Much of its surface is covered with bombs of sizes that rival the giants of Germanyâs Eifel District. 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. Most of the rock fell into the space formerly occupied by gravel beneath the flows. The Biosphere Reserve contains young volcanoes, basalt lava flows, and giant maar craters on the Pinacate Volcanic field. Padre Eusebio Kino, founder of many Spanish missions in the Sonoran Desert, explored here in 1698 and several times later. El Pinacate Volcanic Field (PVF) is located on the NNW region of Sonora, Mexico, and it consists on older lava flows, covered and surrounded by some cinder cones and younger lava flows, result of two different volcanic events, the older one, the event Pre Pinacate (Miocene) and the younger one Pinacate (Quaternary). 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. Apollo 14's Alan Shepard and Ed Mitchell, and Apollo 17's Jack Schmitt trained here in Feb. Location. 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 Fieldsâ extraordinary. Volcanic Field James T. Gutmann The Pinacate is a special place thanks largely to its geology. It is a protected Biosphere Reserve and World Heritage site. The field comprises more than 300 small basaltic volcanoes - cinder cones and maars. 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. There were two distinct episodes of tephra production, Tephra Unit 1 (T1)followed by Tephra Unit 2 (T2). Part of El Pinacate y Gran Desierto de Altar Biosphere Reserve — Sonora. False-color … The Pinacate Peaks lie just north of the fishing resort of Puerto Peñasco. In 1981, Dan Lynch completed his Ph.D. dissertation, "Genesis and Geochronology of Alkaline Volcanism in the Pinacate Volcanic Field, Northwestern Sonora, Mexico" at the University of Arizona. Pinacate is a “monogenetic volcanic field,” the most common kind of Quaternary volcanism on earth. The field today is part of El Pinacate and Gran Desierto de Altar Biosphere Reserve and is a UNESCO World Heritage Site. 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 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 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. From space its a landmark at the head of the Gulf of California. The Pinacate volcanic field is a roughly 55 x 60 km area containing numerous maars, tuff rings, and cinder cones. 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