The Monument is a hoodoo in Cassiar Land District of the Northern Interior of British Columbia, Canada.[1] It lies on the southwestern side of Hoodoo Mountain, a flat-topped stratovolcano in the Northern Cordilleran Volcanic Province.[2] This light grey, needle-like rock formation has an elevation of about 1,100 m (3,600 ft) and rises more than 100 m (330 ft) high, gradually decreasing in diameter to a very sharp point.[1][2] It is slightly oval in cross-section and stands out against the volcanic rocks comprising Hoodoo Mountain.[1]
The Monument contains horizontal columnar jointing and is the eroded remains of a volcanic vent that was probably active between 40,000–30,000 years ago.[1][2][3] However, the amount of lava supplied by The Monument was probably small compared to the main vents now buried beneath Hoodoo's ice cap.[1] It was fed by a dike that intrudes Slide Canyon on the southwestern side of Hoodoo Mountain.[2][3] The surface of The Monument peels off like the layers of an onion, resulting in the creation of a light grey talus deposit at its base.[1][2] The Monument has been described as a lava spine or a volcanic neck.[1][3]
The Monument is a local name that has not been officially approved by the Geographical Names Board of Canada.[1][3]
References
- 1 2 3 4 5 6 7 8 Kerr, F. A. (1948). Lower Stikine and western Iskut river areas, British Columbia (Report). Canada Department of Mines. pp. 44, 45. doi:10.4095/101626.
- 1 2 3 4 5 "Hoodoo Mountain, NW British Columbia, Canada". Oregon State University. Archived from the original on 2009-04-11. Retrieved 2021-09-18.
- 1 2 3 4 Ralph Edwards, Benjamin (1997). Field, Kinetic, and Thermodynamic Studies of Magmatic Assimilation in the Northern Cordilleran Volcanic Province, Northwestern British Columbia (PhD). University of British Columbia. pp. 48, 54.