- Garibaldi Lake Volcanic Field
Infobox Mountain
Name=Garibaldi Lake Volcanic Field
Photo= MtGaribaldi-NorthFace-TheTable.jpg
Caption= The north face ofMount Garibaldi rises aboveThe Table andGaribaldi Lake
Elevation=convert|2316|m|ft|0
Location=British Columbia ,Canada
Range=Garibaldi Ranges
Prominence =
Coordinates = coord|49.92|N|123.03|W|type:mountain
Topographic
Type=Volcanic field
Age=Holocene
Last eruption=Unknown
First ascent=
Easiest route=The Garibaldi Lake Volcanic Field is a
volcanic field , located inBritish Columbia ,Canada . It was formed by a group of nine small andesiticstratovolcano es andbasaltic -andesite vent s in the scenicGaribaldi Lake area immediately north ofMount Garibaldi was formed during the latePleistocene and earlyHolocene . The oldest stratovolcano,Black Tusk , formed between about 1.3 and 1.1 million years ago (Ma). Following glacial dissection, renewed volcanism produced thelava dome and flow forming it's summit. Other Pleistocene vents are located along and to the west of theCheakamus River . Cinder Cone, to the east of Black Tusk, produced a 9-km-longlava flow during the late Pleistocene or early Holocene.Mount Price, west of Garibaldi Lake, 5 km south of Black Tusk, was formed in three stages of activity, dating back 1.1 million years, the latest of which produced two large lava flows from
Clinker Peak during the early Holocene that ponded against the retreating continentialice sheet and formedThe Barrier , containing Garibaldi Lake.The Table is a steep-sided andesitetuya , situated approximately 3 km southwest of Mount Price and south of Garibaldi Lake. It rises 305 meters above glaciated basement rocks. The tuya formed by effusion of flatlying flows within erratics on its summit and lack oferosion al features attributable to glacial suggest that The Table was also formed during the earlyHolocene .Mount Garibaldi is the largest volcano in theGaribaldi Volcanic Belt in southernBritish Columbia , and is one of the few Cascade volcanoes that is made exclusively ofdacite (Glacier Peak is the other).Round Mountain is an eroded volcanic outcrop, located 8 km southwest of
Eanastick Meadows , 9 km east ofBrackendale and 10 km south of Mount Garibaldi. It is the highpoint ofPaul Ridge and last erupted during the Pleistocene.Opal Cone is acinder cone on the southeast flank of Mount Garibaldi. It is the sourse of a 15 km long broad dacitelava flow with prominent wrinkled ridges. The lava flow is unusually long for a silicic lava flow.reClinker Peak is a stratovolcano on the west shoulder of Mount Price on the west side ofGaribaldi Lake . It has produced two large lava flows about 9,000 years ago.Glacier Pikes is alava dome with two rocky points at the southern end of theSentinal Glacier Neve .Mount Brew is a subglacial mound, which last erupted during the
Pleistocene .Hazards
Future eruptions within the region could indanger the municipalities of
Whistler andSquamish . Even though noPlinian eruption s are recognized, evenPelean eruption s may possibly create large amounts ofvolcanic ash that will possibly affect these close by villages. Ash columns from the volcanoes might rise hundreds of metres and could make this a serious hazard for air traffic.The unstable lava formation of
The Barrier has in the past unleashed severaldebris flow s in the area below the lake, most recently in1855 -56 forming a large boulder field which gives Rubble Creek its name. Concerns about the Barrier's instability due to volcanic, tectonic, or heavyrainfall activity prompted the provincial government to declare the area immediately below it unsafe for human habitation in1981 . This led to the evacuation of the nearby village of Garibaldi, and the relocation of residents to new recreational subdivisions away from the hazard zone. Should the Barrier completely collapse, Garibaldi Lake would be entirely released and downstream damage in the Cheakamus andSquamish River s would be considerable, including major damage to the town of Squamish and possibly an impact-wave on the waters ofHowe Sound that would reachVancouver Island .ee also
*
List of volcanoes in Canada
*Cascade Volcanic Arc
*Garibaldi Volcanic Belt
*Garibaldi Lake
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