There is good evidence that late collapse of the east flank occurred at San Francisco Mountain. As the North American Plate moves over the spot, new volcanoes appear. SP Crater is one of the youngest cinder cones within the SFVF; the youngest is Sunset Crater, which erupted in 1085 AD The San Francisco Volcanic Field lies not near the city of the same name but in northern Arizona. Since then, much of the mountain has been removed to create the “Inner Basin.” The missing material may have been removed quickly and explosively by an eruption similar to the 1980 eruption of Mount St. Helens, Washington, or it may … Numerous pueblos were built, some of which still remain standing today. Bay Nature’s email newsletter delivers local nature stories, hikes, and events to your inbox each week. Volcanic activity in the Uinkaret and San Francisco volcanic fields is trending to the east as older eruptions are found on the west side of the local volcanic fields. But for the most recent local volcano, travel north to the 4,200-foot Mount Konocti near Clear Lake. The Advanced Land Imager on NASA’s Earth Observing-1 satellite captured this natural-color image on April 17, 2010. 135 km north of San Francisco. The San Francisco volcanic field is a vast area covering more than 10,000 km22 containing cinder cones, lava fields, lava domes and the majestic (extinct) San Francisco Peaks, the highest of all mountains in Arizona, rising 5,000 feet above the surrounding plateau. Yup, the San Francisco Peaks are an extinct stratovolcano which last erupted some 200,000 years ago. San Francisco volcanic field: | | ||| | USGS |Digital elevation model| of the San Francis... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled. And college geology classes often visit the Nicasio Dam in West Marin to see pillow basalt lava that erupted deep in the Pacific over 100 million years ago. The catastrophic result of an eruption at San Francisco Mountain about 400,000 years ago is visible in the collapsed look of the mountain’s eastern flank. The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. (510) 528-8550, Subscription Customer Service: The San Francisco volcanic field is an area of volcanoes in northern Arizona, north of Flagstaff, USA.The field covers 1,800 square miles (4,700 km²) of the southern boundary of the Colorado Plateau.The field contains 600 volcanoes ranging in age from nearly 6 million years old to less than 1,000 years (Miocene to Holocene), of which Sunset Crater is the youngest. Part of the Central Volcanic Zone of the Andes, it rises 5,672 metres (18,609 ft) above sea level. Much of the field lies within Coconino and Kaibab National Forests. The view from Social Science: How people will think and behave during an extended crisis with large uncertainties. During its approximately 6-million-year history, this field has produced more than 600 volcanoes, and almost all of the hills and mountains between Flagstaff and the Grand Canyon are representative of the San Francisco Volcanic Field. Mount Konocti, a dacitic lava dome on the south shore of Clear Lake, is the largest volcanic feature. The volcanic field is also the site of some of the USA's most recent volcanic activity, the formation of Sunset Crater cinder cone around AD 1100. Sunset Crater in northern Arizona is one of the youngest volcanoes in the USA. Every story from Bay Nature magazine is the product of a team of people dedicated to connecting our readers to the world around them and increasing environmental literacy. The last eruption in the field was the Sunset Crater cinder cone, some 940 years ago; there will be more eruptions in the SF Volcanic Field in the future. The San Francisco Volcanic Field, which covers about 1,800 square miles, is part of northern Arizona’s spectacular landscape. The San Francisco volcanic field is a vast area covering more than 10,000 km22 containing cinder cones, lava fields, lava domes and the majestic (extinct) San Francisco Peaks, the highest of all mountains in Arizona, rising 5,000 feet above the surrounding plateau. But for the most recent local volcano, travel north to the 4,200-foot Mount Konocti near Clear Lake. San Francisco Volcanic Field volcano ) - - - - | Quakes (show) all >M3 >M4 >M5 >M6 M7+ / past 24h - past 48h - past week - past 2 weeks / Archive. Volcanic field: San Francisco volcanic field: Last eruption: 1075 ± 25 years: Climbing; Easiest route: Hike: U.S. National Monument. Tornado Index, #1341 The most recent eruption, Sunset Crater, occurred approximately 900 years ago and was characterized by a NE-SW trending fissure that produced effusive lava flows, fumaroles and volcanic gasses (Smiley, 1958; Alfano, 2013). The San Francisco Volcanic Field is a 4,700 square kilometers (1,800 square miles) area in the southern boundary of the Colorado Plateau. Most of the volcanoes are basalt cinder cones, but there are also large lava domes consisting of rhyolite and dacite. This field, covering an area of ~5000 km2, extends eastward in an irregular belt from near Williams, Arizona, to the Little Colorado River just east of Flagstaff. Volcano news & updates: World-wide volcanic activity reports, updated almost daily. The three youngest fields are the San Francisco, Uinkaret, and Pinacate volcanic fields. This volcanic field seems to have formed from a geological hotspot. 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