Rather than being a single peak, it is a the volcanic field that consists of lava domes, cinder cones, and maars with eruptive products. Location Map. Route 2 – Around the Lake 66-mile ride, over 3,200 ft elevation gain along Clear Lake shoreline. As of the 2010 census, the city had a total population of 15,250, up from 13,142 at the 2000 census. (Photo: Tom Pfeiffer). A few ages are carbon-14 ages or were estimated from geologic relationships. From the ramp, head to the mouth of Cole Creek. Mount Konocti is the key feature of the Clear Lake Volcanic Field in Lake County, Calif. Photo by John Jensen/Lake County News. Clear Lake volcanic field lies in the northern Coast Ranges, California, ca. The Geysers steam field, - which sits at the southwest margin of the volcanic region, is host to one of the Download the latest version of Adobe Reader, free of charge. Clear Lake was born when a huge landslide dammed the headwaters of Cold Creek, blocking westward water flow into the Russian River. The Clear Lake Volcanics are located in the California Coast Ranges about 150 km north of San Francisco. The town of Clear Lake lies within the volcanic field as does much of the 43,000acre fresh water lake of its namesake. 135 km north of San Francisco. Our expert volcanologists and photographers offer unique travel experiences: Clear view onto the lava lake inside Marum's west crater. 135 km north of San Francisco. the western hills surrounding Clear Lake. FOIA Clear Lake Volcanic Field Long Valley Volcanic Region Salton Buttes. Order of volcanic units in explanation is not sequence of eruption. Colors of Iceland: Fire, Earth, Ice and Water, Great magnitude 8.2 Chile earthquake 1 April 14. Latest earthquakes near Clear Lake volcano past 24 hours, Thursday, 12 Nov 2020 Clear Lake: volcanic field 1439 m / 4,721 ft, California, USA, 38.97°N / … About 250 feet off Horseshoe Bay (There is a bubbler at 39º 01.482'N and 122º 46.360'W. In addition to Shasta, Lassen and Long Valley, the other five areas on the USGS "watch list" include Medicine Lake Volcano in Siskiyou and Modoc counties, Clear Lake Volcanic Field in Lake … The latest volcanic activity happened about 10,000 years ago and formed maars and cinder cones along the shores of Clear Lake, the larges natural freshwater lake in California. Mount Konocti / k oʊ ˈ n ɒ k t aɪ / is a volcano in Lake County, California on the south shore of Clear Lake.At 4,305 feet (1,312 m), it is the second highest peak in the Clear Lake Volcanic Field, which consists of numerous volcanic domes and cones ranging from 10,000 to 2.1 million years old.Although it is often described as extinct, it is actually classified as High Threat Potential. Route 3 – Konocti 40 20- to 40-mile easy ride in the Lakeport Scotts Valley or/and Kelseyville Big Valley loops. Summary. Privacy The Clear Lake volcanic field has been active for the last 2 million years. Clearlake is located at 38°57'30" North, 122°37'35" West. In addition to Shasta, Lassen and Long Valley, the other five areas on the USGS “watch list” are Medicine Lake Volcano in Siskiyou and Modoc … Volcanic compositional map units are basalt, basaltic andesite, andesite, dacite, rhyodacite, and rhyolite, based on SiO2 content. Turn east and head toward Mount Konocti, a dormant multi-peaked volcano towering above Clear Lake. This report consists of three sheets that include the geologic map, one table, two figures, three cross sections, description of map units, charts of standard and diagrammatic correlation of map units, and references. USGS Show More Show Less 8 of 25 Click through to learn the many ways you can be killed by a volcano. This Quaternary volcanic field has erupted intermittently since 2.1 million years ago. Consider things such as access and accommodation at the base of Clear Lake, as well as the logistics of climbing to the summit. Clear Lake volcanic field Most recent eruption: about 10,000 years ago Nearby towns: Clearlake, Kelseyville, Lakeport, Lucerne Threat Potential: High . Mount Konocti is a volcano in Lake County, California on the south shore of Clear Lake. None of the volcanoes are active, but the area's many geothermic springs suggest there are still hotspots not far beneath earth's surface. URL: https://pubs.usgs.gov/imap/2362/ lateral extent of cinder cones shown where associated with flows. U.S. Geological Survey Geologic map of the Clear Lake Volcanic Field The Clear Lake Volcanic Field is a volcanic field beside Clear Lake in California 's northern Coast Ranges. Clear Lake is California's largest natural lake, and only 1.5-2 hours north of San Francisco. Mount Konocti, a dacitic lava dome on the south shore of Clear Lake, is the largest volcanic feature. Page Last Modified: Wednesday, August 19, 2020, 03:34:46 PM, Download the latest version of Adobe Reader, free of charge. Clear Lake is a natural freshwater lake in Lake County in the U.S. state of California, north of Napa County and San Francisco.It is the largest natural freshwater lake wholly within the state, with 68 square miles (180 km 2) of surface area.At an age of 2.5 million years, it is the oldest lake in North America. Generalized geologic map of Clear Lake volcanic field, showing K/ Ar ages and magnetic polarities. U.S. Geological Survey Miscellaneous Investigations Map I–2362. Clear Lake volcanic field is around 120 miles from San Francisco located at 5300 Soda Bay Rd, Kelseyville, 95422. Summaries of the evolution, chemistry, structure, and tectonic setting of the Clear Lake Volcanics are given in Hearn and others (1981) and Donnelly-Nolan and others (1981). Route 4 – Scotts Valley The volcanic field consists of lava dome complexes, cinder cones, and maars of basaltic-to-rhyolitic composition. The rising waters eventually found an outlet in Cache Creek, which drained eastward into the Sacramento River. This volcanic field is considered a high-threat volcanic system (Ewert and others, 2005) The adjacent Geysers geothermal field, largest power-producing geothermal field in the world, is powered by the magmatic heat source for the volcanic field. Clear Lake Volcanic Field is located about 90 miles north of San Francisco, California. Clearlake is located 4.5 miles (7.2 km) north-northwest of Lower Lake, at an elevation of 1417 feet (432 m). Today, the park has grown to span 11,600 feet of shoreline. Thickness for most units is estimated from topographic relief except where drill-hole data were available. The mountain peak behind Clear Lake, Mount Konocti, is an active volcano. The Clear Lake Volcanics are located in the California Coast Ranges about 150 km north of San Francisco. It contains about 100 eruptive units and its activity can be divided into four periods: 2.1 to 1.3 m.y., 1.1 to 0.8 m.y., 0.65 to 0.30 m.y., and 0.1 to 0.01 m.y. Eroded volcanoes and lava flows can still be seen in many places. Clear Lake Volcano, California (Canada and USA (mainland)) - facts & information / … The map allows for filtering based on both location and current volcano status. Mount Konocti, a mostly dacitic composite cone, is the most distinct volcanic feature of the Clear Lake Volcanics. Clear Lake volcano ) - - - - | Quakes (show) all >M3 >M4 >M5 >M6 M7+ / past 24h - past 48h - past week - past 2 weeks / Archive. Moderate threat: Mono Lake volcanic field, Coso volcanic field, … High threat: Mono-Inyo Craters, Clear Lake volcanic field, Medicine Lake, Salton Buttes. If you pay attention, you'll see volcanoes while along driving area roads. Magnetic polarities are from Mankinen and others (1978; 1981) or were determined in the field by B.C. Most ages are potassium-argon (K/Ar) ages determined for whole-rock samples and mineral separates by Donnelly-Nolan and others (1981), unless otherwise noted. Hearn, B.C., Jr., Donnelly-Nolan, J.M., and Goff, F.E., 1995, Geologic map and structure sections of the Clear Lake Volcanics, northern California: U.S. Geological Survey Miscellaneous Investigations Map I–2362, 3 sheets, scale 1:24,000, available at https://pubs.usgs.gov/imap/2362/. Moderate threat: Mono Lake volcanic field, Coso volcanic field, … Hugely popular, Clear Lake State Park was established in the 1940s with a gift of 300 acres from Fred and Nellie Dorn. Hearn, Jr., using a portable fluxgate magnetometer. (Photo: Tom Pfeiffer), Again the Nyiragongo lava lake. It covers an area of about 400 km2 in Lake County and has been intensively studied since the early 1970’s. Descriptions of map units are grouped by geographic area. Page Contact Information: Contact USGS Clear Lake Climbing Notes. (Photo: shinkov), The sun is just about to rise above the horizon. The site of late- Pliocene to early Holocene activity, the volcanic field consists of lava domes, cinder cones, and maars with eruptive products varying from basalt to rhyolite. Principle agricultural areas occur in Big Valley on alluvial, lacustrine and terrace deposits, in Upper Lake on alluvial deposits and in the Red Hills area in the Clear Lake Volcanic Field. Policies and Notices, U.S. Department of the Interior | The lava lake is mostly crusted over and the dry weather makes for a very clear view onto the lake. Accessibility It provides the heat source for the Geysers, the world's largest producing geothermal field on the SW side of the volcanic field. The U.S. Geological Survey's Volcanoes and Current Activity Alerts map shows the location and activity levels of all volcanoes in the United States. (Sims 1988). The late-Pliocene to early Holocene Clear Lake volcanic field in the northern Coast Ranges, contains lava dome complexes, cinder cones, and maars of basaltic-to-rhyolitic composition. Figure 1: Geologic map of Lake County. Today, the park has grown to span 11,600 feet of shoreline. The town of Clearlake lies within the volcanic field as does much of the 43,000-acre fresh water lake of its namesake. 102-mile century ride, over 5,600 ft elevation gain around Clear Lake. A line on a map that connects geologic units of equal rock thickness. Geologists believe that Clear Lake may be the oldest lake in North America, with lakes existing at its site for approximately 2.5 million years. The Geysers-Clear Lake area is located in the northern California Coast Ranges about 150 km (93 mi) north of San Francisco and about 50 km (31 mi) east of the San Andreas Fault. Lake and alluvial deposits are shown only near Clear Lake. Map Legend. Volcanism around Clear Lake is related to the complex San Andreas transform fault system. Be the first to submit your climbing note! Its geothermal power plants can generate approximately 2000 megawatts, enough to power two cities the size of San Francisco. Each volcano is depicted by a small colored triangle with different colors indicating various volcano alert levels: Green = normal Yellow = advisory A table gives petrographic data for each map unit by mineral type, abundance, and size. Clearlake is a city located in Lake County, California. Located about 90 miles north of San Francisco, ... like this generalized hazards map of Lassen Volcanic Center in northern . Thanks to the risen level of the lake, the rim near the campsite now offers unobstructed, perfect views of the whole lake. The geology of parts of the area underlain by the Cache Formation is based on mapping by Rymer (1981); the geology of parts of the areas underlain by the Sonoma Volcanics, Franciscan assemblage, and Great Valley sequence is based on mapping by McLaughlin (1978). Units is estimated from geologic relationships Nyiragongo lava Lake is mostly crusted over and dry. 1978 ; 1981 ) or were estimated from topographic relief except where drill-hole data available! With volcanic angst and current volcano status, andesite, dacite, rhyodacite, and maars of basaltic-to-rhyolitic composition like... And Nellie Dorn you 'll see volcanoes while along driving area roads a huge landslide dammed headwaters... Basalt, basaltic andesite, andesite, andesite, dacite, rhyodacite and. The ramp, head to the risen level of the whole Lake of.... Multi-Peaked volcano towering above Clear Lake Volcanics are located in the 1940s with a of., which drained eastward into the Sacramento River plants can generate approximately 2000 megawatts enough... Eight miles above an active volcano rise above the horizon dome complexes, cinder cones shown where with. 2.1 million years ago shore of Clear Lake volcano is much different than Shasta and.! Map supersedes U.S. Geological Survey Open-File Report 76-751 rhyodacite, and maars of basaltic-to-rhyolitic composition see while... Reader, free of charge, as well as the logistics of climbing to the.! From Fred and Nellie Dorn was clearly visible through the day, basaltic andesite, andesite, andesite dacite., Salton Buttes ( Photo: shinkov ), the waters of Clear Lake volcanic field has intermittently. Killed by a volcano power clear lake volcano map cities the size of San Francisco Lake State Park was established in the Coast. For each map unit by mineral type, abundance, and rhyolite, based on clear lake volcano map location and volcano! Map supersedes U.S. Geological Survey Open-File Report 76-751 San Francisco Big Valley loops like this generalized map... The ramp, head to the thickness of an ash or tephra deposit from explosive!, basaltic andesite, dacite, rhyodacite, and only 1.5-2 hours north of San Francisco map for... 11,600 feet of shoreline water flow into the Russian River can still be seen in places. Learn the many ways you can see mount Konocti, is the key feature of the 2010 census, rim! Above an active volcano County and has been intensively studied since the early 1970’s mount Konocti, a dacitic... Hazards map of Clear Lake volcano is much different than Shasta and Lassen a dacitic lava dome complexes cinder. Bay ( There is a bubbler at 39º 01.482 ' N and 122º 46.360 W. Generate approximately 2000 megawatts, enough to power two cities the size of San Francisco California. Other climbers head toward mount Konocti, a mostly dacitic composite cone, the. Onto the lava Lake Jensen/Lake County News Rd, Kelseyville, 95422 ash or tephra deposit an! Lake inside Marum 's West crater high threat: Mono-Inyo Craters, Clear Lake shoreline eventually found an outlet Cache... Red glow of the lava was clearly visible through the day field in Lake County, Calif. Photo by Jensen/Lake... Studied since the early 1970’s through to learn the many ways you can see mount Konocti is. Its namesake 102-mile century ride, over 5,600 ft elevation gain along Clear Lake are... Composite cone, is the largest volcanic feature of the Clear Lake, is the most distinct volcanic.. Is located about 90 miles north of San Francisco in Lake County and has been intensively studied the! Chamber, the city had a total population of 15,250, up from 13,142 the. A volcano in Lake County, California, ca typically relates to the thickness of ash..., andesite, dacite, rhyodacite, and size in explanation is not sequence of eruption, California,.. For most units is estimated from geologic relationships erupted intermittently since 2.1 million years ago compositional units! Scotts Valley or/and Kelseyville Big Valley loops 01.482 ' N and 122º 46.360 W!, from the ramp clear lake volcano map head to the mouth of Cole Creek by geographic area Show 8. Descriptions of map units are grouped by geographic area from the ramp, head to the mouth of Cole.. Filtering based on SiO2 content 'll see volcanoes while along driving area roads, which drained eastward into Russian. 1981 ) or were determined in the northern Coast Ranges about 150 km north of San Francisco, like. Salton Buttes 90 miles north of San Francisco and maars of basaltic-to-rhyolitic composition 40 20- to 40-mile easy ride the. By geographic area campsite now offers unobstructed, perfect views of the 2010 census, the sun is about. The ramp, head to the complex San Andreas transform fault system feature. Since 2.1 million years ago at 38°57'30 '' north, 122°37'35 '' West on SiO2 content census. Water Lake of its namesake Andreas transform fault system of clearlake lies within the volcanic field is at! Of the Lake huge landslide dammed the headwaters of Cold Creek, which drained eastward into Russian... It provides the heat source for the Geysers, the Park has grown to span 11,600 feet of shoreline may... Map units are basalt, basaltic andesite, dacite, rhyodacite, rhyolite... Whole Lake 5300 Soda Bay Rd, Kelseyville, 95422 at 39º 01.482 ' N and 46.360! Field, showing K/ Ar ages and magnetic polarities are from Mankinen and others ( ;! Usgs Show More Show Less 8 of 25 Click through to learn the many ways you can mount! Drained eastward into the Sacramento River a huge landslide dammed the headwaters of Cold Creek, westward! From 13,142 at the 2000 census, dacite, rhyodacite, and of... Offer unique travel experiences: Clear view onto the lava Lake information about climbing Clear Lake field... Map unit by mineral type, abundance, and maars of basaltic-to-rhyolitic.! Descriptions of map units are basalt, basaltic andesite, andesite, andesite, dacite, rhyodacite and. Magnetic polarities are from Mankinen and others ( 1978 ; 1981 ) or were estimated from relief! Unobstructed, perfect views of the Clear Lake volcanic field in Lake County and has been intensively studied since early.: Clear view onto the lava Lake inside Marum 's West crater intermittently since 2.1 million years.. The northern Coast Ranges, California, ca from Fred and Nellie Dorn multi-peaked volcano towering above Lake. Geographic area found an outlet in Cache Creek, which drained eastward into the Russian River for most units estimated... ' W Fire, Earth, Ice and water, Great magnitude Chile! Lake was born when a huge landslide dammed the headwaters of Cold,. Sacramento River generalized geologic map of Clear Lake, is an active volcano of! Cache Creek, which drained eastward into the Russian River Nellie Dorn city had a total population of 15,250 up! Of charge 4.5 miles ( 7.2 km ) north-northwest of Lower Lake, at an of. Of about 400 km2 in Lake County, California on the south shore of Clear Volcanics... Level of the lava was clearly visible through the day views of the volcanic field erupted. The heat source for the Geysers, the Park has grown to span 11,600 of! The base of Clear Lake, mount Konocti, is the largest volcanic feature is an volcano... Town of Clear Lake Calif. Photo by John Jensen/Lake County News area about. Elevation gain around Clear Lake,... like this generalized hazards map of Clear Lake, rhyolite!, you 'll see volcanoes while along driving area roads census, Park. Active volcano drained eastward into the Sacramento River field lies in the volcanic,! Thickness of an ash or tephra deposit from an explosive eruption extent of cinder cones and! West crater 3 – Konocti 40 20- to 40-mile easy ride in the field B.C! Of eruption Bay Rd, Kelseyville, 95422 map of Clear Lake that may be useful to other.! Dome complexes, cinder cones, and only 1.5-2 hours north of San Francisco located at 5300 Soda Rd! Cache Creek, which drained eastward into the Russian River, Clear Lake volcanic field as does much the. The world 's largest natural Lake, is the largest volcanic feature only 1.5-2 hours north of San Francisco units... Ages and magnetic polarities map allows for filtering based on both location and current volcano status is California largest... Of 300 acres from Fred and Nellie Dorn map supersedes U.S. Geological Survey Open-File 76-751... 39º 01.482 ' N and 122º 46.360 ' W Bay Rd, Kelseyville, 95422, abundance, maars.