| Lassen Volcanic National Park | |
|---|---|
| IUCN Category II (National Park) | |
  | |
| Location | Shasta, Lassen, Plumas, and Tehama Counties, California, USA |
| Nearest city | Redding |
| Coordinates | |
| Area | 106,000 acres (42,900 ha) |
| Established | August 9, 1916 |
| Visitors | 395,057 (in 2007) |
| Governing body | National Park Service |
Lassen Volcanic National Park is a United States National Park in central northern California. A national park is a reserve of land usually declared and owned by a national Government, protected from most Human development and pollution Shasta County is a county located in the northern portion of the U Lassen County is a county located in the northeastern portion of the U Plumas County is a county located in the Sierra Nevada of the U Tehama County (pronounced teh-HAY-muh is a county located in the northern part of the U California ( is a US state on the West Coast of the United States, along the Pacific Ocean. The United States of America —commonly referred to as the Redding is a city in Northern California. It is the County seat of Shasta County California, USA Events 48 BC - Caesar's civil war: Battle of Pharsalus - Julius Caesar decisively defeats Pompey at Pharsalus Year 1916 ( MCMXVI) was a Leap year starting on Saturday (link will display the full calendar of the Gregorian calendar (or a Leap year The National Park Service ( NPS) is the United States federal agency that manages all National Parks, many National Monuments, and other conservation The National Park Service ( NPS) is the United States federal agency that manages all National Parks, many National Monuments, and other conservation California ( is a US state on the West Coast of the United States, along the Pacific Ocean. The dominant feature of the park is Lassen Peak; the largest plug dome volcano in the world and the southern-most volcano in the Cascade Range. Lassen Peak (also known as Mount Lassen) is the southernmost active Volcano in the Cascade Range. In Volcanology, a lava dome or plug dome is a roughly circular Mound -shaped protrusion resulting from the slow eruption of Felsic Lava Plate tectonics and hotspots Divergent plate boundaries At the Lassen Volcanic National Park started as two separate national monuments designated by President Theodore Roosevelt in 1907: Cinder Cone National Monument and Lassen Peak National Monument. A National Monument in the United States is a Protected area that is similar to a National Park except that the President of the United States Theodore Roosevelt (ˈroʊzəvɛlt October 27 1858 January 6 1919 also known as T
The source of heat for volcanism in the Lassen area is subduction off the Northern California coast of the Gorda Plate diving below the North American Plate. In Geology, a subduction zone is an area on Earth where two tectonic plates meet and move towards one another with one sliding underneath the other Northern California is the northern portion of the US state of California. The Gorda Plate, located beneath the Pacific Ocean off the coast of northern California, is one of the northern remnants of the Farallon Plate. The North American Plate is a Tectonic plate covering most of North America, Greenland and part of Siberia. The area surrounding Lassen Peak is still active with boiling mud pots, stinking fumaroles, and churning hot springs. A hot spring is a spring that is produced by the emergence of geothermally heated Groundwater from the earth's crust. Lassen Volcanic National Park is one of the few areas in the world where all four types of volcano can be found (plug dome, shield, cinder cone, and strato). A shield volcano is a large Volcano with shallow-sloping sides Volcanic cones are among the simplest Volcano formations in the world A stratovolcano, also called a composite volcano is a tall conical Volcano composed of many layers of hardened Lava, Tephra, and Volcanic
The park is accessible via State Routes SR 89 and SR 44. State Route 89 is a California State Highway that travels in the North-South direction and is the major thoroughfare for many mountain communities State Route 44 is a State highway in the US State of California that travels in an east-west direction from Redding to Lassen Volcanic SR 89 passes north-south through the park, beginning at SR 36 to the south and ending at SR 44 to the north. State Route 36 is an east-west State highway in the US State of California that is routed from U SR 89 passes immediately adjacent the base of Lassen Peak.
There are a total of five vehicle entrances to the park: the north and south entrances of SR 89, and unpaved roads entering at Drakesbad and Juniper Lake in the south, and Butte Lake in the northeast. Juniper Lake is a large Lake located at the southeast corner of Lassen Volcanic National Park in the U Butte Lake is a Lake located in the northeast section of Lassen Volcanic National Park at an elevation of. The Park can also be accessed by trails leading in from Caribou Wilderness to the east, as well as the Pacific Crest Trail, and two smaller trails leading in from Willow Lake and Little Willow Lake to the south. The Pacific Crest Trail (also known as the Pacific Crest National Scenic Trail) is a long-distance mountain Hiking and equestrian trail that runs from
A large lodge (the Lassen Chalet) with concession facilities formerly was located near the south-west entrance, but was demolished in 2005. A new, full-service visitor center is being constructed in the same location, with a planned completion date of 2008. Near the old lodge location was also located Lassen Ski Area, which ceased operation in 1992; all infrastructure has been removed.
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History
Native Americans have inhabited the area long before white settlers first saw Lassen. Native Americans in the United States are the indigenous peoples from the regions of North America now encompassed by the continental United States The natives knew that the peak was full of fire and water and thought that it would one day blow itself apart. [1]
White immigrants in the mid-19th century used Lassen Peak as a landmark on their trek to the fertile Sacramento Valley. The Sacramento Valley is the portion of the California Central Valley that lies to the north of the San Joaquin-Sacramento Delta in the U One of the guides to these immigrants was a Danish blacksmith named Peter Lassen, who settled in Northern California in the 1830s. blacksmith is a person who creates objects from Iron or Steel by Forging the Metal; i Peter Lassen ( October 31, 1800 – April 26, 1859) was a Danish-American Blacksmith, Rancher and prospector. Northern California is the northern portion of the US state of California. Lassen Peak was named after him. [1] Nobles Emigrant Trail was later cut through the park area and passed Cinder Cone and the Fantastic Lava Beds. For the generic cinder cone see Cinder cone. Cinder Cone is a Cinder cone Volcano in Lassen Volcanic National Park (itself in
Inconsistent newspaper accounts reported by witnesses from 1850-1851 described seeing "fire thrown to a terrible height" and "burning lava running down the sides" in the area of Cinder Cone. As late as 1859 a witness reported seeing fire in the sky from a distance, attributing it to an eruption. Early geologists and volcanologists who studied the Cinder Cone concluded the last eruption occurred between 1675 and 1700. Geology (from Greek γη gê, "earth" and λόγος Logos, "speech" lit Volcanology (also spelled vulcanology) is the study of Volcanoes, Lava, Magma, and related geological and Geophysical phenomena After the 1980 eruption of Mount St. Helens, the United States Geological Survey (USGS) began reassessing the potential risk of other active volcanic areas in the Cascade Range. The 1980 eruption of Mount St Helens, a volcano located in Washington state in the United States was a major volcanic eruption. Mount St Helens is an active Stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United States The United States Geological Survey ( USGS) is a scientific agency of the United States government. Further study of Cinder Cone estimated the last eruption occurred between 1630 and 1670.
The Lassen area was first protected by being designated as the Lassen Peak Forest Preserve. Lassen Peak and Cinder Cone were later declared as U.S. National Monuments in May 1907 by President Theodore Roosevelt. A National Monument in the United States is a Protected area that is similar to a National Park except that the President of the United States Theodore Roosevelt (ˈroʊzəvɛlt October 27 1858 January 6 1919 also known as T [2]
Starting in May 1914 and lasting until 1921, a series of minor to major eruptions occurred on Lassen. These events created a new crater, and released lava and a great deal of ash. Lava is molten rock expelled by a Volcano during an eruption When first expelled from a volcanic vent it is a Liquid at Temperatures Volcanic ash consists of small Tephra, which are bits of pulverized rock and glass created by volcanic eruptions less than in diameter Fortunately, because of warnings, no one was killed, but several houses along area creeks were destroyed. Because of the eruptive activity, which continued through 1917, and the area's stark volcanic beauty, Lassen Peak, Cinder Cone and the area surrounding were declared a National Park on August 9, 1916. Events 48 BC - Caesar's civil war: Battle of Pharsalus - Julius Caesar decisively defeats Pompey at Pharsalus Year 1916 ( MCMXVI) was a Leap year starting on Saturday (link will display the full calendar of the Gregorian calendar (or a Leap year [1]
The 29-mile (47 km) Main Park Road was constructed between 1925 and 1931, just 10 years after Lassen Peak erupted. Near Lassen Peak the road reaches 8,512 feet (2,594 m), making it the highest road in the Cascade Mountains. It is not unusual for 40 ft (12 m) of snow to accumulate on the road near Lake Helen. Lake Helen is a glacial Lake or a tarn occupying a cirque at around 8200 feet (2500 m) in Lassen Volcanic National
In 1974 the United States Park Service took the advice of the USGS and closed the visitor center and accommodations at Manzanita Lake. The National Park Service ( NPS) is the United States federal agency that manages all National Parks, many National Monuments, and other conservation Manzanita Lake is a Lake located in Lassen Volcanic National Park. The Survey stated that these buildings would be in the way of a rockslide from Chaos Crags if an earthquake or eruption occurred in the area. Chaos Crags is the youngest group of Lava domes in Lassen Volcanic National Park, California, having been formed as five Dacite domes 1100-1000 An earthquake is the result of a sudden release of energy in the Earth 's crust that creates Seismic waves Earthquakes are recorded with a Seismometer [1] An aging seismograph station remains. Seismometers (from Greek Seism - "the shakes" - and Metro - "I measure" are instruments that measure and record motions of the ground including
After the Mount St. Helens eruption, the USGS intensified its monitoring of active and potentially active volcanoes in the Cascade Range. Monitoring of the Lassen area includes periodic measurements of ground deformation and volcanic-gas emissions and continuous transmission of data from a local network of nine seismometers to USGS offices in Menlo Park, California. Menlo Park is an affluent City in San Mateo County, in the San Francisco Bay Area of California [3] Should indications of a significant increase in volcanic activity be detected, the USGS will immediately deploy scientists and specially designed portable monitoring instruments to evaluate the threat. In addition, the National Park Service (NPS) has developed an emergency response plan that would be activated to protect the public in the event of an impending eruption. The National Park Service ( NPS) is the United States federal agency that manages all National Parks, many National Monuments, and other conservation
Geography and climate
The park is located near the northern end of the Sacramento Valley. The Sacramento Valley is the portion of the California Central Valley that lies to the north of the San Joaquin-Sacramento Delta in the U The western part of the park features great lava pinnacles (huge mountains created by lava flows), jagged craters, and steaming sulphur vents. A mountain is a Landform that extends above the surrounding Terrain in a limited area with a peak Lava is molten rock expelled by a Volcano during an eruption When first expelled from a volcanic vent it is a Liquid at Temperatures It is cut by glaciated canyons and is dotted and threaded by lakes and rushing clear streams. For the song see CANYONMID. For the band see Canyon (band. A canyon (rarely cañon) or gorge A lake (from Latin lacus) is a Terrain feature (or Physical feature) a body of Liquid on the surface of a world that is localized to the A stream is a body of Water with a current, confined within a bed and stream-banks
The eastern part of the park is a vast lava plateau more than one mile (1. 6 km) above sea level. Here are found small cinder cones (Fairfield Peak, Hat Mountain, and Crater Butte). A cinder cone or scoria cone is a steep conical Hill of volcanic fragments that accumulate around and downwind from a Volcanic vent. [4] Forested with pine and fir, this area is studded with small lakes, but it boasts few streams. This article is about the tree For other uses of the term "pine" see Pine (disambiguation. Firs ( Abies) are a genus of between 45-55 species of Evergreen conifers in the family Pinaceae. Warner Valley, marking the southern edge of the Lassen Plateau, features hot spring areas (Boiling Springs Lake, Devils Kitchen, and Terminal Geyser). [4] This forested, steep valley also has large meadows that have wildflowers in spring. A wildflower (or wild flower) is a Flower that grows wild meaning it was not intentionally seeded or planted
Lassen Peak is made of dacite and is one of the world's largest lava domes. Dacite ( deɪsaɪt) is an igneous, volcanic rock with a high iron content In Volcanology, a lava dome or plug dome is a roughly circular Mound -shaped protrusion resulting from the slow eruption of Felsic Lava It is also the southernmost non-extinct volcano of the Cascade Range (specifically, the Shasta Cascade part of the range). The Shasta Cascade region of California is located in the northeastern and north-central sections of the state bordering Oregon and Nevada, including far 10,457-foot (3,187 m) tall volcano sits on the north-east flank of the remains of Mount Tehama, a stratovolcano that was a thousand feet (305 m) higher than Lassen and 11 to 15 miles (18 to 24 km) wide at its base. Mount Tehama (also called Brokeoff Volcano) is an eroded andesitic Stratovolcano located in the Shasta Cascade part of the Cascade Volcanic A stratovolcano, also called a composite volcano is a tall conical Volcano composed of many layers of hardened Lava, Tephra, and Volcanic [1] After emptying its throat and partially doing the same to its magma chamber in a series of eruptions, Tehama either collapsed into itself and formed a two-mile (3. A magma chamber is a large underground pool of molten rock lying under the surface of the earth's crust 2 km) wide caldera in the late Pleistocene or was simply eroded away with the help of acidic vapors that turned hard rock into clay. A caldera is a cauldron-like volcanic feature formed by the collapse of land following a volcanic eruption The Pleistocene ('plaɪstəsin is the epoch from 18 million to 10000 years BP covering the world's recent period In Computer science, ACID ( Atomicity Consistency Isolation Durability) is a set of properties that guarantee that Database transactions are Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and
On the other side of the present caldera is Brokeoff Mountain (9,235 feet or 2,815 m), which is an erosional remnant of Mount Tehama and the second highest peak in the park. Mount Tehama (also called Brokeoff Volcano) is an eroded andesitic Stratovolcano located in the Shasta Cascade part of the Cascade Volcanic Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind Mount Conrad, Mount Diller, and Pilot Pinnacle are also remnant peaks around the caldera.
Sulphur Works is a geothermal area in between Lassen Peak and Brokeoff Mountain that is thought to mark an area near the center of Tehama's now-gone cone. Other geothermal areas in the caldera are Little Hot Springs Valley, Diamond Point (an old lava conduit), and Bumpass Hell (see Geothermal areas in Lassen Volcanic National Park). Several groups of Hot springs and Fumaroles remnants of former volcanic activity exist in Lassen Volcanic National Park.
The magma that fuels the volcanoes in the park is derived from subduction off the coast of Northern California. In Geology, a subduction zone is an area on Earth where two tectonic plates meet and move towards one another with one sliding underneath the other
Cinder Cone and the Fantastic Lava Beds, located about 10 miles (16 km) northeast of Lassen Peak, is a cinder cone volcano and associated lava flow field that last erupted about 1650. For the generic cinder cone see Cinder cone. Cinder Cone is a Cinder cone Volcano in Lassen Volcanic National Park (itself in It created a series of basaltic andesite to andesite lava flows known as the Fantastic Lava Beds. For the extinct cephalopod genus see Andesites. Andesite (ˈændəsaɪt is an igneous, Volcanic rock, of intermediate For the extinct cephalopod genus see Andesites. Andesite (ˈændəsaɪt is an igneous, Volcanic rock, of intermediate
There are four shield volcanoes in the park; Mount Harkness (southwest corner of the park), Red Mountain (at south-central boundary), Prospect Peak (in northwest corner), and Raker Peak (north of Lassen Peak). A shield volcano is a large Volcano with shallow-sloping sides All of these volcanoes are 7,000-8,400 feet (2,133-2,560 m) above sea level and each is topped by a cinder cone volcano. Mean sea level (MSL is the average (mean height of the Sea, with reference to a suitable reference surface
During ice ages, glaciers have modified and helped to erode the older volcanoes in the park. An ice age is a period of long-term reduction in the Temperature of the Earth 's surface and atmosphere resulting in an expansion of continental Ice sheets "Glacial" and "Glaciation" redirect here For the geological periods see Glacial period. Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind The center of snow accumulation and therefore ice radiation was Lassen Peak, Red Mountain, and Raker Peak. "Snowfall" redirects here For other uses see Snow (disambiguation or Snowfall (disambiguation. Ice is a Solid phase, usually crystalline, of a Non-metalic substance that is liquid or gas at Room temperature, such as Ammonia These volcanoes thus show more glacial scarring than other volcanoes in the park.
Despite not having any glaciers currently, Lassen Peak does have 14 permanent snowfields ([1]).
Since the entire park is located at medium to high elevations, the park generally has cool-cold winters and warm summers below 7,500 feet (2,300 m). The elevation of a Geographic location is its height above a fixed reference point often the mean sea level. Above this elevation, the climate is harsh and cold, with cool summer temperatures. Precipitation within the park is high to very high due to a lack of a rain shadow from the Coast Ranges. In Meteorology, precipitation (also known as one class of hydrometeors, which are atmospheric water phenomena is any product of the condensation of atmospheric The Pacific Coast Ranges are the series of Mountain ranges that stretch along the west coast of North America from Alaska to northern and central Mexico The park gets more precipitation than anywhere in the Cascades south of the Three Sisters. The Three Sisters are three volcanic peaks of the Cascade Volcanic Arc and the Cascade Range in Oregon, each of which exceed in elevation Snowfall at the Lassen Peak Chalet at 6,700 feet (2,040 m) is around 430 inches (1,100 cm) despite facing east. Up around Lake Helen, at 8,200 feet (2,500 m) the snowfall is around 600-700 inches (1500 cm to 1800 cm), making it probably the snowiest place in California. Lake Helen is a glacial Lake or a tarn occupying a cirque at around 8200 feet (2500 m) in Lassen Volcanic National In addition, Lake Helen gets more average snow accumulation than any other recording station located near a volcano in the Cascade range, with a maximum of 178 inches (450 cm). Most generally the accumulation of capital refers simply to the gathering or amassment of objects of value the increase in wealth or the creation of wealth [5] Snowbanks persist year-round.
Geology
Formation of basement rocks
In the Cenozoic, uplifting and westward tilting of the Sierra Nevada along with extensive volcanism generated huge lahars (volcanic-derived mud flows) in the Pliocene which became the Tuscan Formation. The Cenozoic (also Caenozoic or Cainozoic) Era (ˌsiːnəˈzoʊɪk/ /ˌsɛn- (meaning "new life" ( Greek ( kainos) "new" The Sierra Nevada ( Spanish for "Snowy Range" is a Mountain range located in the U A lahar is a type of Mudflow / Landslide composed of Pyroclastic material and Water that flows down from a Volcano, typically The Pliocene epoch (spelled Pleiocene in some older texts is the period in the Geologic timescale that extends This formation is not exposed anywhere in the national park but it is just below the surface in many areas.
Also in the Pliocene, basaltic flows erupted from vents and fissures in the southern part of the park. Basalt (bəˈsɔːlt ˈbeisɔːlt ˈbæsɔːlt is a common Extrusive Volcanic rock. These and later flows covered increasingly large areas and built a lava plateau. Lava is molten rock expelled by a Volcano during an eruption When first expelled from a volcanic vent it is a Liquid at Temperatures In the later Pliocene and into the Pleistocene, these basaltic flows were covered by successive thick and fluid flows of andesite lava, which geologists call the Juniper lavas and the Twin Lakes lavas. The Pleistocene ('plaɪstəsin is the epoch from 18 million to 10000 years BP covering the world's recent period For the extinct cephalopod genus see Andesites. Andesite (ˈændəsaɪt is an igneous, Volcanic rock, of intermediate The Twin Lakes lava is black, porphyritic and has abundant xenocrysts of quartz (see Cinder Cone). Porphyry is a variety of Igneous rock consisting of large-grained Crystals such as Feldspar or Quartz, dispersed in a fine-grained This article concerns the geologic term for other uses see Xenolith (disambiguation A xenolith ( Greek: 'foreign rock' is a rock Quartz (from German) is the most abundant Mineral in the Earth 's Continental crust (although Feldspar is more common in For the generic cinder cone see Cinder cone. Cinder Cone is a Cinder cone Volcano in Lassen Volcanic National Park (itself in
Another group of andesite lava flows called the Flatiron, erupted during this time and covered the southwestern part of the park's area. The park by this time was a relatively featureless and large lava plain. Subsequently, the Eastern basalt flows erupted along the eastern boundary of what is now the park, forming low hills that were later eroded into rugged terrain. Erosion is the carrying away or displacement of solids ( Sediment, Soil, rock and other particles usually by the agents of currents such as wind
Volcanoes rise
Pyroclastic eruptions then started to pile tephra into cones in the northern area of the park. Lake Helen is a glacial Lake or a tarn occupying a cirque at around 8200 feet (2500 m) in Lassen Volcanic National Pyroclastic rocks or pyroclastics (derived from the Greek πῦρ, meaning fire and κλαστός, meaning broken are Clastic rocks Tephra is air-fall material produced by a volcanic eruption regardless of composition or fragment size
Mount Tehama (also known as Brokeoff Volcano) rose as a stratovolcano in the southeastern corner of the park during the Pleistocene. Mount Tehama (also called Brokeoff Volcano) is an eroded andesitic Stratovolcano located in the Shasta Cascade part of the Cascade Volcanic A stratovolcano, also called a composite volcano is a tall conical Volcano composed of many layers of hardened Lava, Tephra, and Volcanic The Pleistocene ('plaɪstəsin is the epoch from 18 million to 10000 years BP covering the world's recent period It was made of roughly alternating layers of andesitic lavas and tephra (volcanic ash, breccia, and pumice) with increasing amounts of tephra with elevation. Tephra is air-fall material produced by a volcanic eruption regardless of composition or fragment size Volcanic ash consists of small Tephra, which are bits of pulverized rock and glass created by volcanic eruptions less than in diameter Breccia (ˈbrɛtʃiə ˈbrɛʃiə breach is a rock composed of angular fragments of several Minerals or rocks in a matrix, that is a cementing material Pumice is a textural term for a volcanic rock that is a solidified frothy lava composed of highly microvesicular glass Pyroclastic with very thin translucent 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 a two-mile (3. 2 km) wide caldera after it emptied its throat and partially did the same to its magma chamber in a series of eruptions. A caldera is a cauldron-like volcanic feature formed by the collapse of land following a volcanic eruption A magma chamber is a large underground pool of molten rock lying under the surface of the earth's crust One of these eruptions occurred where Lassen Peak now stands, and consisted of fluid, black, glassy dacite, which formed a layer 1,500 feet (460 m) thick (outcroppings of which can be seen as columnar rock at Lassen's base). Lassen Peak (also known as Mount Lassen) is the southernmost active Volcano in the Cascade Range. Dacite ( deɪsaɪt) is an igneous, volcanic rock with a high iron content
During glacial periods (ice ages) of the present Wisconsinan glaciation, glaciers have modified and helped to erode the older volcanoes in the park, including the remains of Tehama. "Last glacial" redirects here For the period of maximum glacier extent during this time see Last Glacial Maximum The last glacial period Many of these glacial features, deposits and scars, however, have been covered up by tephra and avalanches, or were destroyed by eruptions.
Roughly 27,000 years ago (older data gave an age of 18,000 years), Lassen Peak started to form as a dacite lava dome quickly pushed its way through Tehama's destroyed north-eastern flank. Dacite ( deɪsaɪt) is an igneous, volcanic rock with a high iron content In Volcanology, a lava dome or plug dome is a roughly circular Mound -shaped protrusion resulting from the slow eruption of Felsic Lava As the lava dome pushed its way up, it shattered overlaying rock, which formed a blanket of talus around the emerging volcano. Lassen rose and reached its present height in a relatively short time, probably in as little as a few years. Lassen Peak has also been partially eroded by Ice Age glaciers, at least one of which extended as much as 7 miles (11 km) from the volcano itself.
Since then, smaller dacite domes formed around Lassen. The largest of these, Chaos Crags, is just north of Lassen Peak. Chaos Crags is the youngest group of Lava domes in Lassen Volcanic National Park, California, having been formed as five Dacite domes 1100-1000 Phreatic (steam explosion) eruptions, dacite and andesite lava flows and cinder cone formation have persisted into modern times. The term phreatic is used in Earth sciences to refer to matters relating to ground water below the static Water table (the word originates from the Greek Dacite ( deɪsaɪt) is an igneous, volcanic rock with a high iron content For the extinct cephalopod genus see Andesites. Andesite (ˈændəsaɪt is an igneous, Volcanic rock, of intermediate Volcanic cones are among the simplest Volcano formations in the world
Media
Sights of Mount Lassen, including Bumpass Hell 
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See also
- Lassen Peak
- Chaos Crags
- Geothermal areas in Lassen Volcanic National Park
- List of nationally protected areas of the United States
- Volcanic Legacy Scenic Byway
References
- Geology of National Parks: Fifth Edition, Ann G. Lassen Peak (also known as Mount Lassen) is the southernmost active Volcano in the Cascade Range. Chaos Crags is the youngest group of Lava domes in Lassen Volcanic National Park, California, having been formed as five Dacite domes 1100-1000 Several groups of Hot springs and Fumaroles remnants of former volcanic activity exist in Lassen Volcanic National Park. The Protected areas of the United States are managed by an array of different federal state tribal and local level authorities and receive widely varying levels The Volcanic Legacy Scenic Byway is an All-American Road in the U Harris, Esther Tuttle, Sherwood D. , Tuttle (Iowa, Kendall/Hunt Publishing; 1997) ISBN 0-7872-5353-7
- Volcano Hazards of the Lassen Volcanic National Park Area, California, U.S. Geological Survey Fact Sheet 022-00, Online version 1. The United States Geological Survey ( USGS) is a scientific agency of the United States government. 0 (adapted public domain text; accessed 25 September 2006)
Footnotes
External links
- Official National Park Service website
- Lassen Visitor Center
- USGS: Volcano Hazards of the Lassen Volcanic National Park Area
- USGS: Geology of Lassen Volcanic National Park
- Photos of Lassen Volcanic National Park - Terra Galleria
- Historic images of Lassen National Park, from the University of California
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