Monmouth Creek complex

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Monmouth Creek complex
Monmouth Creek complex is located in British Columbia
Monmouth Creek complex
Monmouth Creek complex
Highest point
Elevation 510 m (1,670 ft)
Coordinates 49°41′38″N 123°11′49″W / 49.69389°N 123.19694°W / 49.69389; -123.19694Coordinates: 49°41′38″N 123°11′49″W / 49.69389°N 123.19694°W / 49.69389; -123.19694
Location British Columbia, Canada
Parent range Pacific Ranges
Topo map NTS 92G/11
Age of rock Unknown[1]
Volcanic arc/belt Cascade Volcanic Arc
Garibaldi Volcanic Belt

The Monmouth Creek complex is a volcanic complex in southwestern British Columbia, Canada, located 4 km (2.5 mi) southwest of the community of Squamish on the west side of the Squamish River mouth. It lies in the southern Pacific Ranges of the Coast Mountains and is part of the Squamish volcanic field in the southern Garibaldi Volcanic Belt, which represents the northernmost extension of the Cascade Volcanic Arc.

Its prominent and enigmatic edifice is composed of basaltic andesite to dacite of unknown age and may represent a group of dikes and lava domes that formed subglacially.[1] At least four dikes protrude its summit.[1][2] These form the ribs of 60 m (200 ft) to 180 m (590 ft) high lava spines, the tallest being The Castle, which contains horizontal and radiating columnar joints.[1] The spines are covered by welded breccia close to their bases and columnar jointing extends into the welded sequence.[1] The most elevated lava flows and spines are composed of dacite.[1]


  1. ^ a b c d e f Smellie, J.L.; Chapman, Mary G. (2002). Volcano-Ice Interaction on Earth and Mars. Geological Society of London. p. 201. ISBN 1-86239-121-1. 
  2. ^ Kelman, M.C.; Russell, J.K.; Hickson, C.J. (2002). Effusive intermediate glaciovolcanism in the Garibaldi volcanic belt, southwestern British Columbia, Canada. 101-605 Robson Street, Vancouver, British Columbia V6B 5J3, Canada: Geological Survey of Canada. p. 197. 

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