Mont Shefford is a Monteregian Hill located in Shefford in the

Estrie Estrie () is an administrative region of Quebec that comprises the Eastern Townships. ''Estrie'', a French neologism, was coined as a derivative of ''est'', "east". Originally settled by anglophones, today it is about 90 per cent francophone. Angl ...

region of

Quebec Quebec ( ; )According to the Canadian government, ''Québec'' (with the acute accent) is the official name in Canadian French and ''Quebec'' (without the accent) is the province's official name in Canadian English is one of the thirtee ...

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 ...

. Mont Shefford is tall, and was home to the Ski Shefford

ski resort A ski resort is a resort developed for skiing, snowboarding, and other winter sports. In Europe, most ski resorts are towns or villages in or adjacent to a ski area – a mountainous area with pistes (ski trails) and a ski lift system. In North ...

which closed in 2006.

Geology

Mount Shefford was formed some 125

million years The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). ...

ago during an underground intrusion of

magma Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural sa ...

. This magma did not reach the earth's surface and remained in a deep freeze. The mountain appeared following the erosion of nearby

sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...

s by

glacier A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its Ablation#Glaciology, ablation over many years, often Century, centuries. It acquires dis ...

s. The sedimentary rock was more fragile than the

metamorphic rock Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causin ...

formed by the contact of the magma and the surrounding sedimentary rock. CINLB - 20120916 - Mont Shefford

Mountains of Quebec under 1000 metres

Mont Shefford Mont Shefford is a Monteregian Hill located in Shefford in the Estrie region of Quebec, Canada. Mont Shefford is tall, and was home to the Ski Shefford ski resort which closed in 2006. Geology Mount Shefford was formed some 125 million yea ...

Igneous petrology of Quebec Stocks (geology) La Haute-Yamaska Regional County Municipality {{montérégie-geo-stub