Mont Yamaska (in English, Mount Yamaska) (in
Abenaki
The Abenaki (Abenaki: ''Wαpánahki'') are an Indigenous peoples of the Northeastern Woodlands of Canada and the United States. They are an Algonquian-speaking people and part of the Wabanaki Confederacy. The Eastern Abenaki language was predom ...
, Wigwômadenek
[http://www.toponymie.gouv.qc.ca/ct/pdf/la%20toponymie%20des%20Abenaquis.pdf?ts=0.14881141134537756 ]) is part of the
Monteregian Hills
The Monteregian Hills (french: Collines Montérégiennes) is a linear chain of isolated hills in Montreal and Montérégie, between the Laurentians and the Appalachians.
Etymology
The first definition of the Monteregian Hills came about in 190 ...
in southern Quebec. Its summit stands above sea level. This mountain is largely covered with
deciduous
In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...
forest dominated by
sugar maple
''Acer saccharum'', the sugar maple, is a species of flowering plant in the soapberry and lychee family Sapindaceae. It is native to the hardwood forests of eastern Canada and eastern United States. Sugar maple is best known for being the prima ...
. Some
apple
An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wh ...
orchards are raised on lower slopes.
Geology
Mont Yamaska is composed of
igneous
Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or ...
rock and
hornfels
Hornfels is the group name for a set of contact metamorphic rocks that have been baked and hardened by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases exceedingly tough and durable. These pro ...
. The igneous rock is mostly
mafic
A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include ...
with much
gabbro
Gabbro () is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is che ...
,
essexite
Essexite (), also called nepheline monzogabbro (), is a dark gray or black holocrystalline plutonic igneous rock. Its name is derived from the type locality in Essex County, Massachusetts, in the United States.
Modern petrology identifies rock ...
, and a
titanium
Titanium is a chemical element with the symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resistant to corrosion in ...
-rich
pyroxenite
Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite, diopside, hypersthene, bronzite or enstatite. Pyroxenites are classified into clinopyroxenites, orthopyroxenites, and the we ...
. There also is a small area of
nepheline syenite
Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or pink, and in general appearance they are not unlike granites, but dark green varieties are al ...
. Mont Yamaska might be the deep extension of a vastly eroded ancient volcanic complex, which was probably active about 125 million years ago.
[A Hundred-Million Year History of the Corner Rise and New England Seamounts](_blank)
Retrieved on 2007-08-01 The mountain was created when the
North American Plate
The North American Plate is a tectonic plate covering most of North America, Cuba, the Bahamas, extreme northeastern Asia, and parts of Iceland and the Azores. With an area of , it is the Earth's second largest tectonic plate, behind the Pacific ...
moved westward over the
New England hotspot
The New England hotspot, also referred to as the Great Meteor hotspot and sometimes the Monteregian hotspot, is a volcanic hotspot in the North Atlantic Ocean. It created the Monteregian Hills intrusions in Montreal and Montérégie, the White ...
,
along with the other mountains of the
Monteregian Hills
The Monteregian Hills (french: Collines Montérégiennes) is a linear chain of isolated hills in Montreal and Montérégie, between the Laurentians and the Appalachians.
Etymology
The first definition of the Monteregian Hills came about in 190 ...
that form part of the
Great Meteor hotspot track
The New England hotspot, also referred to as the Great Meteor hotspot and sometimes the Monteregian hotspot, is a volcanic hotspot in the North Atlantic Ocean. It created the Monteregian Hills intrusions in Montreal and Montérégie, the White ...
.
See also
Yamaska National Park
References
External links
Le mont Yamaska «sous mon aile!»Fondation pour la conservation du mont Yamaska
Mont Yamaska
Mont Yamaska (in English, Mount Yamaska) (in Abenaki, Wigwômadenekhttp://www.toponymie.gouv.qc.ca/ct/pdf/la%20toponymie%20des%20Abenaquis.pdf?ts=0.14881141134537756 ) is part of the Monteregian Hills in southern Quebec. Its summit stands above s ...
Mountains of Quebec under 1000 metres
Igneous petrology of Quebec
Stocks (geology)
{{Quebec-geo-stub