The Monteregian Hills are part of the Great Meteor hotspot track, formed as a result of the North American Plate sliding westward over the long-lived New England hotspot,[4] and are the eroded remnants of intrusive stocks. These intrusive stocks have been variously interpreted as the feeder intrusions of long extinct volcanoes, which would have been active about 125 million years ago,[5][6] or as intrusives that never breached the surface in volcanic activity.[7] The lack of an obvious track west of the Monteregian Hills may be due either to failure of the plume to penetrate the Canadian Shield, to the lack of recognizable intrusions, or to strengthening of the plume when it approached the Monteregian Hills region. However, there is evidence the hotspot track extends northwestwards, including epeirogenic uplift, mantle velocity anomalies and kimberlitic volcanic features (e.g. the Attawapiskat, Kirkland Lake and Lake Timiskaming kimberlite fields) that become older away from the Monteregian Hills.[8]
The shallow, rocky sandy loam soils of the summits are mostly covered in forest. Where the underlying rock is rich in olivine, as over large areas of Mont Saint-Bruno and Mont Rougemont, these soils are classed as dystric brunisol. Podzol tends to develop over rock which lacks olivine, although many of these podzols lack an eluvial (Ae) horizon. Lower slopes are covered with aprons of gravel or sand. The sandy soils are usually podzols with classic Ae development; they often have subsoil hardpan and are undesirable for agriculture. The free-draining gravels are preferred for apple orchards, which grow in thermal belts where cold air can drain to the valley floor.[9][10]
^Feininger, Tomas; Goodacre, Alan K. (2003). "The distribution of igneous rocks beneath Mont Mégantic (the easternmost Monteregian) as revealed by gravity". Canadian Journal of Earth Sciences. 40 (5): 765–773. Bibcode:2003CaJES..40..765F. doi:10.1139/e03-022.
^Bédard, Pierre. "La province géologique montérégienne : l'état des connaissances" (PDF) (in French). Communauté métropolitaine de Montréal. p. 6. Retrieved 22 August 2014. Avec le progrès des connaissances géologiques, le mont Mégantic, les roches intrusives d'Iberville, d'Oka, et de Saint-André se sont progressivement ajoutés à la liste.
^Eaton, David W.; Frederiksen, Andrew (2007). "Seismic evidence for convection-driven motion of the North American plate". Nature. 446 (7134): 428–431. Bibcode:2007Natur.446..428E. doi:10.1038/nature05675. PMID 17377580. S2CID 4420814.
^. Archived from the original on 2007-12-20. Retrieved 2007-12-16. Geology of Gault Nature Reserve, Mont St. Hilaire, McGill University
^Darbyshire, Fione A.; Eaton, David W.; Frederiksen, Andrew W.; Ertolahti, Leila (2007). "New insights into the lithosphere beneath the Superior Province from Rayleigh wave dispersion and receiver function analysis". Geophysical Journal International. 169 (3): 4. Bibcode:2007GeoJI.169.1043D. doi:10.1111/j.1365-246X.2006.03259.x.
^"Mont Bleu". Peakbagger.com. Retrieved 20 August 2014.
January 01, 1970
monteregian, hills, royal, mountains, redirects, here, confused, with, mount, royal, range, mount, royal, french, collines, montérégiennes, linear, chain, isolated, mountains, montreal, montérégie, between, laurentians, appalachians, three, central, mountains,. Royal Mountains redirects here Not to be confused with Mount Royal Range or Mount Royal The Monteregian Hills French Collines Monteregiennes is a linear chain of isolated mountains in Montreal and Monteregie between the Laurentians and the Appalachians Monteregian HillsThree of the central Monteregian Hills mountains from left Mont Saint Hilaire Mont Rougemont and Mont Yamaska viewed from space Highest pointPeakMont MeganticElevation1 105 m 3 625 ft GeographyCountryCanadaProvinceQuebecRange coordinates45 28 7 N 73 2 4 W 45 4783 N 73 0400 W 45 4783 73 0400GeologyAge of rockEarly Cretaceous Contents 1 Etymology 2 Geology 3 Gallery 4 See also 5 External links 6 ReferencesEtymology editThe first definition of the Monteregian Hills came about in 1903 when Montreal geologist Frank Dawson Adams began referring to Mount Royal Latin Mons Regius and mountains of similar geology in the Saint Lawrence Lowlands as the Royal Mountains French montagnes royales 1 Other mountains in the chain included Mont Saint Bruno Mont Saint Hilaire Mont Saint Gregoire Mont Rougemont Mont Yamaska Mont Shefford and Mont Brome It was only later that Mont Megantic 2 the Oka Hills as well as the Saint Andre and d Iberville formations were added to the list 3 Geology editEach mountain in the chain consists of an erosional remnant of Cretaceous intrusive igneous rock and associated hornfels which are more resistant to weathering than the surrounding sedimentary rock All of the mountains have dark coloured mafic rock such as gabbro and essexite some also have large areas of pulaskite syenite and other light coloured rock citation needed The Monteregian Hills are part of the Great Meteor hotspot track formed as a result of the North American Plate sliding westward over the long lived New England hotspot 4 and are the eroded remnants of intrusive stocks These intrusive stocks have been variously interpreted as the feeder intrusions of long extinct volcanoes which would have been active about 125 million years ago 5 6 or as intrusives that never breached the surface in volcanic activity 7 The lack of an obvious track west of the Monteregian Hills may be due either to failure of the plume to penetrate the Canadian Shield to the lack of recognizable intrusions or to strengthening of the plume when it approached the Monteregian Hills region However there is evidence the hotspot track extends northwestwards including epeirogenic uplift mantle velocity anomalies and kimberlitic volcanic features e g the Attawapiskat Kirkland Lake and Lake Timiskaming kimberlite fields that become older away from the Monteregian Hills 8 The shallow rocky sandy loam soils of the summits are mostly covered in forest Where the underlying rock is rich in olivine as over large areas of Mont Saint Bruno and Mont Rougemont these soils are classed as dystric brunisol Podzol tends to develop over rock which lacks olivine although many of these podzols lack an eluvial Ae horizon Lower slopes are covered with aprons of gravel or sand The sandy soils are usually podzols with classic Ae development they often have subsoil hardpan and are undesirable for agriculture The free draining gravels are preferred for apple orchards which grow in thermal belts where cold air can drain to the valley floor 9 10 Monteregian Hills Name Height Age Coordinates Location St Andrews formation 130 metres 430 ft n a 45 55 N 74 31 W Saint Andre d Argenteuil Oka Hills 249 metres 817 ft 11 n a 45 28 N 74 5 W Oka Mount Royal 233 metres 764 ft 118 138 myr 45 30 23 N 73 35 20 W Montreal Mont Saint Bruno 218 metres 715 ft 118 136 myr 45 33 18 N 73 18 36 W Saint Bruno de Montarville Mont Saint Hilaire 411 metres 1 348 ft 135 myr 45 33 8 N 73 9 50 W Mont Saint Hilaire Mont Saint Gregoire 251 metres 823 ft 119 myr 45 21 29 N 73 9 8 W Mont Saint Gregoire Mont Rougemont 381 metres 1 250 ft 137 myr 45 28 36 N 73 3 17 W Rougemont Mont Yamaska 416 metres 1 365 ft 120 140 myr 45 27 25 N 72 52 19 W Saint Paul d Abbotsford Mont Shefford 526 metres 1 726 ft 120 130 myr 45 21 49 N 72 37 33 W Shefford Mont Brome 553 metres 1 814 ft 118 138 myr 45 16 59 N 72 37 59 W Bromont Mont Megantic 1 105 metres 3 625 ft 128 133 myr 45 27 21 N 71 9 8 W Notre Dame des Bois Map all coordinates using OpenStreetMap Download coordinates as KML GPX all coordinates GPX primary coordinates GPX secondary coordinates Gallery edit nbsp Four of the Monteregian Hills in the late fall nbsp Mont Saint Hilaire from the south nbsp aerial view of Mont Yamaska nbsp Mont Rougemont as seen from Mt Saint Gregoire nbsp Mont Megantic as seen from the Stoke MountainsSee also editVolcanism of Canada Volcanism of Eastern CanadaExternal links edit nbsp Wikimedia Commons has media related to Monteregian Hills in French Les collines monteregiennes Geologic information about the chainReferences edit Banque de noms de lieux du Quebec Reference number 76975 toponymie gouv qc ca in French Commission de toponymie du Quebec Feininger Tomas Goodacre Alan K 2003 The distribution of igneous rocks beneath Mont Megantic the easternmost Monteregian as revealed by gravity Canadian Journal of Earth Sciences 40 5 765 773 Bibcode 2003CaJES 40 765F doi 10 1139 e03 022 Bedard Pierre La province geologique monteregienne l etat des connaissances PDF in French Communaute metropolitaine de Montreal p 6 Retrieved 22 August 2014 Avec le progres des connaissances geologiques le mont Megantic les roches intrusives d Iberville d Oka et de Saint Andre se sont progressivement ajoutes a la liste Eaton David W Frederiksen Andrew 2007 Seismic evidence for convection driven motion of the North American plate Nature 446 7134 428 431 Bibcode 2007Natur 446 428E doi 10 1038 nature05675 PMID 17377580 S2CID 4420814 A Hundred Million Year History of the Corner Rise and New England Seamounts http www oceanexplorer noaa gov explorations 05stepstones background geologic history geologic history html Archived 2013 07 08 at the Wayback Machine Retrieved on 2007 08 01 The Monteregian Hills Igneous Intrusions http geoscape nrcan gc ca montreal heritage e php mont Archived 2009 04 26 at the Wayback Machine Natural Resources Canada Geoscape Montreal 2006 07 24 Geology Archived from the original on 2007 12 20 Retrieved 2007 12 16 Geology of Gault Nature Reserve Mont St Hilaire McGill University Darbyshire Fione A Eaton David W Frederiksen Andrew W Ertolahti Leila 2007 New insights into the lithosphere beneath the Superior Province from Rayleigh wave dispersion and receiver function analysis Geophysical Journal International 169 3 4 Bibcode 2007GeoJI 169 1043D doi 10 1111 j 1365 246X 2006 03259 x https sis agr gc ca siscan publications surveys pq pq49b pq49b report pdf Soil Survey of Rouville County French https sis agr gc ca cansis publications surveys pq pq62 pq62 report pdf Orchard Soils of the Province of Quebec Mont Bleu Peakbagger com Retrieved 20 August 2014 Retrieved from https en wikipedia org w index php title Monteregian Hills amp oldid 1171057996, wikipedia, 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