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	Medicine Lake Volcano - Wikipedia, the free encyclopedia
		The volcano is primarily composed of basalt and basaltic andesite lava flows, and has a 7 by 12 km (4.3 by 7.4 mile) caldera at the center.
		Medicine Lake caldera is a 7 by 12 km depression (4.3 by 7.4 mile) in the summit area of the volcano that may have formed by collapse after a large volume of andesite was erupted from vents along the caldera rim.
		Later conclusions were that Medicine Lake caldera formed by collapse in response to repeated extrusions of mostly mafic lava beginning early in the history of the volcano (perhaps in a manner similar to the formation of Kilauea caldera in Hawaii).
	en.wikipedia.org /wiki/Medicine_Lake_Volcano (974 words)

	Medicine Lake Volcano (via CobWeb/3.1 planetlab2.netlab.uky.edu) (Site not responding. Last check: 2007-11-04)
		Medicine Lake Volcano is a large shield volcano in the northeastern California about 50 kilometers (30 miles) northeast of Mount Shasta.
		The Volcano is primarily composed of basalt and basaltic andesite lava flows, and has a 7 by 12 kilometer (4.3 by 7.4 mile) caldera at the center.
		Medicine Lake caldera is a 7 by 12 kilometer depression (4.3 by 7.4 mile) in the summit area of the Volcano that may have formed by collapse after a large volume of andesite was erupted from vents along the caldera rim.
	medicine-lake-volcano.iqnaut.net.cob-web.org:8888 (943 words)

	[No title]
		The subregion was further divided into (a) the Medicine Lake Basin; (b) the area from the outer limits of the Medicine Lake Basin to the 1,750-meter topographic contour; and (c) from the 1,750-meter to the 1,500-meter topographic contour (Figure 3.2.6).
		Medicine Lake Crater is a Hydrologic Subarea of the Pit River Hydrologic Unit, which is part of the Central Valley Basin.
		Both in the Medicine Lake Highlands and in the Modoc Plateau, the occurrence of surface waters is sparse due to the highly permeable surface rocks.
	www.blm.gov /ca/eis/telephone/chapter032a.htm (12658 words)

	CVO Website - Medicine Lake and Lava Beds, California
		Medicine Lake volcano is a shield volcano of basaltic through rhyolitic composition that lies east of the main axis of the Cascade Range, approximately 50 kilometers east-northeast of Mount Shasta, which is the largest of the Cascade stratovolcanoes.
		Medicine Lake volcano is a Pleistocene-Holocene shield volcano located about 50 kilometers east-northeast of Mount Shasta, between the crest of the Cascade Range to the west and the Basin and Range tectonic province to the east.
		Medicine Lake volcano is a shield volcano of basaltic through rhyolitic comopsition that lies east of the main axis of the Cascade Range, approximately 50 kilometers east-northeast of Mount Shasta...
	vulcan.wr.usgs.gov /Volcanoes/MedicineLake/description_medicine_lake.html (6283 words)

	Automated IFSAR Terrain Analysis System - Leighty and Assoc., Inc.
		To the south, volcanoes form some of the mountain ranges; in the north the volcanic rocks are young and occur mostly in the basins.
		The lava flow patterns on the northeastern flank of Medicine Lake volcano in the vicinity of "A" in Figure 5.4.1-10 suggests that the large cinder cone volcano posed an obstacle and diverted flows to either side.
		The regional grade is downward to the northeast away from the Medicine Lake volcano and the gentler slopes have a surface pattern suggestive of old flows with subdued ash-covered surfaces.
	www.tec.army.mil /publications/ifsar/lafinal08_01/five/5.1.6.htm (5458 words)

	Global Volcanism Program \| Medicine Lake \| Summary (Site not responding. Last check: 2007-11-04)
		Medicine Lake is a large Pleistocene-to-Holocene, basaltic-to-rhyolitic shield volcano east of the main axis of the Cascade Range.
		Medicine Lake volcanism, similar in style to that of Newberry volcano in Oregon, began less than one million years ago.
		Lava Beds National Monument on the northern flank of Medicine Lake shield volcano contains hundreds of lava-tube caves displaying a variety of spectacular lava-flow features, most of which are found in the voluminous Mammoth Crater lava flow, which extends in several lobes up to 24 km from the vent.
	www.volcano.si.edu /world/volcano.cfm?vnum=1203-02- (224 words)

	Medicine Lake
		Medicine Lake lolls in a forested bowl in extreme northeastern California--so far north that some people sneak up on it from Klamath Falls, Oregon.
		My argument with M over the source of the lake water began when he told me before we left Sacramento that the state had recently planted hundreds of thousands of fingerling trout and a busload of brood fish in Medicine Lake.
		The lake and the forest are hunkered down together in a lava field rolled out like a carpet runner at the feet of Mount Shasta and a bunch of other muttering semi-inactive sister volcano pensioners lined up in their wheelchairs on a sunny verandah.
	home.pacbell.net /halvoter/Medicine_Lake.html (1118 words)

	Cascade volcanoes case study
		While many of the classic volcanic peaks in the Cascades are composite cones (volcanoes formed by alternating layers of pyroclastic fragments and lava flows), the mountain range is built upon extensive basalt flows and also includes andesites and rhyolites.
		The lake is approximately 1,932 feet deep and appears an intense blue due to the clarity and depth of the water.
		Eruptions at Medicine Lake Volcano are a result of the subduction zone to the west and the tensional stresses common to the Basin and Range province to the east.
	www.ship.edu /~cjwolt/geology/cas.htm (1153 words)

	SC Guide Service - Northern California Fishing Guide Scott Caldwell (via CobWeb/3.1 planetlab2.netlab.uky.edu) (Site not responding. Last check: 2007-11-04)
		Medicine Lake is a small high mountain lake (6,680 feet) that lies within the Medicine Lake caldera.
		The 7x12-kilometer caldera is a depression near the summit of the Medicine Lake volcano (7,762 feet).
		Medicine Lake is a small 408 acre lake that offers boating, camping, fishing, hiking and swimming.
	www.fishingguidepictures.com.cob-web.org:8888 /medicinelake.htm (123 words)

	R/V Fast Eddy on Medicine Lake (via CobWeb/3.1 planetlab2.netlab.uky.edu) (Site not responding. Last check: 2007-11-04)
		Medicine Lake volcano is a Pleistocene and Holocene shield volcano located in the Cascade Range, 50 km northeast of Mount Shasta.
		Once the lake sediments are sampled, USGS researchers hope to use them to unravel the volcanic and climate history of the region and the geochemical behavior of mercury in volcanic terrains.
		Medicine Lake is a popular camping and fishing spot, and considerable public interest has been expressed in a new bathymetric map to replace the old one that dates back to 1955.
	soundwaves.usgs.gov.cob-web.org:8888 /1999/11/fieldwork5.html (405 words)

	Untitled Document (Site not responding. Last check: 2007-11-04)
		Medicine Lake volcano began to grow about one million years ago, following eruption of a large volume of tholeiitic high-alumina basalt.
		Although mafic lavas predominate on the volcano's flanks, all lava compositions from basalt to rhyolite have erupted during Pleistocene time.
		Basalt is mostly absent at higher elevation, where andesite dominates and rhyolite and small volumes of dacite are present.
	oregonstate.edu /~hoguej/MedicineLake.html (180 words)

	Travel the Volcanic Legacy Byway All American Road in Oregon and California
		Medicine Lake Volcano, a broad shield capped by a 4- by 7-mile caldera, has erupted at least 8 times in the past 4,000 years, most recently about 900 years ago.
		At 4317 meters above seal level, Mount Shasta is the tallest volcano on the Byway...one of the largest composite cones (or stratovolcanos) in the world, so-called because the volcano actually consists of the remains of at least four different cones, two of which were destroyed by erosion or explosion.
		Shastina, the northernmost peak of Mount Shasta, is a large subsidiary cone that rises to 3,758 meters on the west flank of the compound volcano.
	www.volcaniclegacybyway.org /volcan.html (877 words)

	Save Medicine Lake : SF Indymedia (Site not responding. Last check: 2007-11-04)
		Medicine Lake is being threatened by geothermal development.
		Medicine Lake is a sacred place for many of Northern California’s native tribes.
		Medicine Lake is located east of Mt. Shasta and north of Mt. Lassen.
	sf.indymedia.org /mail.php?id=1649891 (366 words)

	Volcanoes and lava features
		Medicine Lake Volcano is a shield volcano composed primarily of basalts that erupted in fairly liquid (low viscosity) flows.
		Shield volcanoes are characterized by gentle slopes formed by fairly liquid (low viscosity) basalt lava.
		Rainier is a composite cone, a volcano formed by alternating layers of cinders and basalt flows.
	www.ship.edu /~cjwolt/geology/slides/vol-sum.htm (656 words)

	Steady subsidence of Medicine Lake volcano, northern California, revealed by repeated leveling surveys
		Leveling surveys of a 193-km circuit across Medicine Lake volcano (MLV) in 1954 and 1989 show that the summit area subsided by as much as 302 ± 30 mm (−8.6 ± 0.9 mm/yr) with respect to a datum point near Bartle, California, 40 km to the southwest.
		Surveys of an east–west traverse across Lava Beds National Monument on the north flank of the volcano in 1990 and of a 23-km traverse across the summit area in 1999 show that subsidence continued at essentially the same rate during 1989–1999 as 1954–1989.
		Instead, we attribute the subsidence and faulting to: (1) gravitational loading of thermally weakened crust by the mass of the volcano and associated intrusive rocks, and (2) thinning of locally weakened crust by Basin and Range deformation.
	www.agu.org /pubs/crossref/2002/2001JB000893.shtml (438 words)

	Lava Beds National Monument - Nature & Science
		~ Though not as tall as most other Cascade volcanoes, the Medicine Lake Volcano is, by volume and in surface area, the largest volcano in the entire Cascade Range, covering over 700 square miles with an estimated volume of around 130 cubic miles.
		The lava flows from the north and east sides of the Medicine Lake Volcano filled in much of the former basin, leaving only the northern end as a lake.
		The rock layers seen in the face of Gillem Bluff (underlying the tuff) are therefore older than 2,000,000 years old.
	www.nps.gov /labe/pphtml/subenvironmentalfactors13.html (689 words)

	Lava Beds National Monument - Nature & Science
		Medicine Lake Volcano is a shield volcano that forms a gently-sloping mound with a surface area of over 700 square miles.
		The most active shield volcanoes are found in the Hawaiian Islands and are built of very fluid lava that flows a great distance from its source.
		The highest point of the Medicine Lake highlands is almost 8,000 feet above sea level.
	www.nps.gov /labe/pphtml/subnaturalfeatures39.html (609 words)

	Medicine Lake Volcano, California
		The volcano has produced a wide range of volcanic products from basaltic spatter cones to obsidian flows of rhyolitic composition.
		On Sept. 29, 1988, 47 earthquakes were detected at Medicine Lake volcano which had experienced only 1 earthquake in the past 8 years.
		Twelve earthquakes were detected in the Medicine Lake area (about 900 km NNW of the epicenter) in the 30 minutes after the June 28, 1992, M 7.5 earthquake in southern California.
	users.bendnet.com /bjensen/volcano/us/california-medicine.html (339 words)

	Lava Beds National Monument Guide on CompassMonkey.com
		Lava Beds National Monument is located on the north flank of a large shield volcano, Medicine Lake volcano.
		This distribution is true of all of the lower slopes of Medicine Lake volcano.
		The Callahan flow is the youngest lava flow in the monument.
	www.compassmonkey.com /places/locations.php/12/geology (976 words)

	Mount Shasta Bioregional Ecology Center
		The pristine aquifer beneath the Medicine Lake Volcano feeds the largest fresh water springs in California, the Fall River Springs, which are among the most voluminous in the entire United States.
		Dr. Robert Curry, a hydrogeologist testifying on behalf of the Pit River Tribe and Mount Shasta Bioregional Ecology Center, held the audience spellbound with a power point presentation of the characteristics of the Medicine Lake Volcano and what is known of its underlying aquifer.
		BLM state geologist Sean Hagerty admitted that acidization was very controversial in the Medicine Lake Highlands, though the substance had been used in a few other instances elsewhere and once in 1989 for a well at Telephone Flat.
	www.mountshastaecology.org /12medicinelake.html (1200 words)

	Skiing the Cascade Volcanoes: Medicine Lake Volcano
		Like Newberry, Medicine Lake is a shield volcano which underwent multiple caldera-forming collapses, resulting in a huge 4.5 x 7.5 mile (7 x 12 km) wide depression which houses its namesake lake.
		The variety of recent volcanic features at Medicine Lake is truly astonishing, and it is a shame that only a small portion of its northern flanks enjoys nationally protected status.
		Mount Hoffman is the highest point on Medicine Lake Volcano, a small cinder cone perched on the north rim of the caldera.
	www.skimountaineer.com /CascadeSki/CascadeSki.php?name=MedicineLake (1047 words)

	Wildernet - Medicine Lake Highlands Trail - 1
		GENERAL INFORMATION: The Medicine Lake Highlands were formed with the development of a broad shield volcano.
		The volcanoes discharged lava onto the caldera floor and down the outer edges of the original Lake Highlands.
		Medicine Lake Highlands is also an area of moderately sloping to steep mountains.
	www.wildernet.com /pages/activity.cfm?actid=050903IO*53278hw (380 words)

	The petrology and geochemistry of diverse crustal xenoliths, Tatara-San Pedro Volcanic Complex, Chilean Andes
		Ultramafic xenoliths from Adagdak volcano, Adak, Aleutian islands, Alaska: deformed igneous cumulates from the Moho of an island arc.
		Klyuchevskoy Volcano, Kamchatka, Russia: the role of high-flux recharged, tapped, and fractionated magma chamber(s) in the genesis of high-Al from high-MgO basalt.
		Amphibole-bearing basalts from the submarine volcano Kick'em-Jenny in the Lesser Antilles Island Arc.
	www.unige.ch /cyberdocuments/theses2000/CostaF/these_back.html (4443 words)

	Skiing the Cascade Volcanoes: Newberry Volcano
		Newberry Volcano is the largest volcano in Oregon, a broad shield volcano with a huge area of 600 square miles (1500 square km) and massive volume of 110 cubic miles (450 cubic km) which are second only to Medicine Lake Volcano in the entire Cascade Range.
		In spring, the remaining segment of the road into the two lakes is also plowed open, allowing very short access to a variety of nice ski routes, most of which are more cross-country than downhill.
		A trail leads along the rim from the Paulina Lake entrance, although this is a snowmobile route in winter.
	www.skimountaineer.com /CascadeSki/CascadeSki.php?name=Newberry (911 words)

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