Chilliwack batholith

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Slesse Mountain in British Columbia, Canada, consists of Chilliwack batholith rocks SlesseMountain.jpg
Slesse Mountain in British Columbia, Canada, consists of Chilliwack batholith rocks

The Chilliwack Batholith is a large batholith that forms much of the North Cascades in southwestern British Columbia, Canada and the U.S. state of Washington.

The geological structure is named after the Chilliwack River Valley, where it outcrops in many places. It does not outcrop anywhere near the City of Chilliwack.

The Chilliwack Batholith is part of the Pemberton Volcanic Belt and is the largest mass of exposed intrusive rock in the Cascade Volcanic Arc.

The age of the Chilliwack batholith ranges from 26 to 29 million years old. [1]

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Eaton Peak is a 2,117-metre (6,946-foot) double summit mountain located in the Canadian Cascades of southwestern British Columbia, Canada. It is situated 17 km (11 mi) southeast of Hope, 3 km (2 mi) south of Mt. Grant, and 12.6 km (8 mi) northwest of Silvertip Mountain. The peak was first climbed in 1950 by J. Butcher, F. Rodgers, and E. Jenkins. The peak was named to honor Canadian Army Private Douglas B. Eaton (1911-1944), from nearby Chilliwack, who was killed in action in World War II. The mountain's name was officially adopted April 7, 1955, by the Geographical Names Board of Canada. Nearby Eaton Creek and Eaton Lake were named in memory of his younger brother, William, also killed in action a year earlier. Precipitation runoff from the peak drains into Silverhope Creek, a tributary of the Fraser River.

<span class="mw-page-title-main">Hannegan caldera</span> Geologic caldera in Washington (state)

Hannegan caldera is a 3.72 million year old volcanic collapse structure in the North Cascades of the U.S. state of Washington. The caldera collapsed during two separate volcanic eruptions that produced as much as 140 km3 of rhyolite ash.

References

  1. "Miocene peralkaline volcanism in west-central British Columbia - Its temporal and plate-tectonics setting" (PDF). Archived from the original (PDF) on 2011-07-06. Retrieved 2010-02-18.

Coordinates: 49°01′N121°35′W / 49.017°N 121.583°W / 49.017; -121.583