LASSEN VOLCANIC NATIONAL PARK

Updated 05-May-2020.

Mondo shtuff from around the internet, all about LASSEN VOLCANIC NATIONAL PARK!

Lassen Volcanic National Park (U.S. National Park Service): Home Page Landing Page

My botty best at summarizing from Wikipedia: the dominant feature of the park is Lassen Peak, the largest plug dome volcano in the world . Lassen Volcanic National Park started as two separate national monuments designated by president theodore Roosevelt in 1907 . the park SR 89 passes north-south through the park, beginning at SR 36 to the south . there are five vehicle entrances to the park . trails leading in from the caribou Wilderness to the east the lassen ski area ceased operation in 1992 and all infrastructure has been removed . the natives knew that the peak was full of fire and water and thought it would blow itself apart . inconsistent newspaper accounts reported by witnesses from 1850 to 1851 . as late as 1859, a witness reported seeing fire in the sky from a distance . the last eruption occurred between 1675 and 1700 recent tree-ring analysis places the date at 1666 . Lassen Peak and Cinder Cone were declared as U.S. National Monuments . eruptions created a new crater, and released lava and Lassen Peak, Cinder Cone and the area surrounding were declared a National Park on august 9, 1916 . the 29-mile (47 km) Main Park Road was constructed between 1925 and 1931 . 40 ft (12 the national park service seeks to manage the wilderness in keeping with the Wilderness Act of 1964 . the management plan of 2003 adds that “the wilderness experience offers a moderate to high degree of challenge and adventure” a campground, store, and museum dedicated to Benjamin F. Loomis stands near manzanita lake . the USGS intensified its monitoring of active and potentially active volcanoes . should indications of a significant NPS counts visitors by counting vehicles entering the park via in-road inductive loops . buses and other non-reportable vehicles are subtracted from the vehicle count . the western part of the park features great Warner Valley, marking the southern edge of the Lassen Plateau, features hot spring areas . this forested, steep valley also has large meadows that have wildflowers in spring . lassen peak is one of the world’s largest plug dome volcanoes . it is also the southernmost non-extinct volcano of the Cascade Range . 10,457-foot (3,187 m) tall the magma that fuels the volcanoes in the park is derived from subduction off the coast of Northern California . Cinder Cone and the Fantastic Lava Beds created a series of basaltic ande cinder cone volcanoes are 7,000–8,400 feet (2,133–2,560 m) above sea level . ice ages have modified and helped to erode older volcanices in the park . the park gets more precipitation than anywhere else in the Cascades south of the Three Sisters . snowfall at the visitor center near the southwest entrance at 6,700 feet (2,040 m) is around 430 inches Lake Helen gets more average snow accumulation than any other recording station near a volcano in the Cascade range . Lassen Volcanic National Park has a Red Fir, aka Abies magnifica (7) potential vegetation type between elevations of 6,500 and 8,000 feet, Red Fir, Western White Pine, Mountain Hemlock, and Lodgepole Pine dominate a community less diverse than the mixed-conifer forest . subalpine areas trees in this community include Whitebark Pine and Mountain Hemlock . basaltic flows erupted from vents and fissures in the southern part of the national park . geologists call the Juniper la the Twin Lakes lava is black, porphyritic and has abundant xenocrysts of quartz . Mount Tehama rose as a stratovolcano in the southwestern corner of the at its height, Tehama was probably about 11,000 feet (3,400 m) high . Approximately 350,000 years ago its cone collapsed into itself and formed caldera . one eruption occurred where Lassen Peak now stands many glacial features, deposits and scars have been covered up by tephra and avalanches . lava dome pushed its way through Tehama’s destroyed north-eastern flank . eruptions there are active hot springs and mud pots in the Lassen area . some of these springs are the site of occurrence of extremophile micro-organisms . Kendall/Hunt Publishing. National Park Service. Retrieved May 21, 2011. Retrieved May 21, 2011 . “USGS: Geology of Lassen Volcanic National Park”. U.S. Geological Survey. Retrieved May 21, 2011. “Historic images of Lassen National Park”. University of California. Retrieved may 21, 2011. Retrieved October 17, 2018. Retrieved November 17, 2018.