Mount Barr is a
mountain
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually highe ...
in the
Skagit Range
The Skagit Range ( ) is a subrange of the Cascade Range in southwestern British Columbia, Canada and northwestern Washington, United States, which are known in Canada as the Canadian Cascades or, officially, the Cascade Mountains. The Skagit Rang ...
of the
Cascade Mountains
The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as the North Cascades, a ...
of southern
British Columbia
British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...
,
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
, located on the northeast side of
Wahleach Lake
Wahleach Lake, commonly known as Jones Lake, is a lake and reservoir located in the Skagit Range in the Lower Mainland of British Columbia, Canada, east of the city of Chilliwack and southwest of the town of Hope.
The lake, which was a resting p ...
and just southwest of
Hope. It is a ridge highpoint with an elevation of .
Mount Barr is one of several magmatic features just north of the
Chilliwack batholith
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 ...
. It is part of
a large circular igneous intrusion that was placed along the Fraser Fault 16 to 21 million years ago.
The intrusion is part of the
Pemberton Volcanic Belt
The Pemberton Volcanic Belt is an eroded Oligocene- Miocene volcanic belt at a low angle near the Mount Meager massif, British Columbia, Canada. The Garibaldi and Pemberton volcanic belts appear to merge into a single belt, although the Pembert ...
, an eroded
volcanic belt
A volcanic belt is a large volcanically active region. Other terms are used for smaller areas of activity, such as volcanic fields. Volcanic belts are found above zones of unusually high temperature () where magma is created by partial melting ...
that formed as a result of
subduction of the
Farallon Plate
The Farallon Plate was an ancient oceanic plate. It formed one of the three main plates of Panthalassa, alongside the Phoenix Plate and Izanagi Plate, which were connected by a triple junction. The Farallon Plate began subducting under the west ...
starting 29 million years ago.
References
External links
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Canadian Cascades
One-thousanders of British Columbia
Landforms of Lower Mainland
Pemberton Volcanic Belt
Stocks (geology)
Miocene magmatism
Yale Division Yale Land District
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