Monteregian Hills
| Monteregian Hills | |
|---|---|
Three of the central Monteregian hills (from left: Mont Saint-Hilaire, Mont Rougemont and Mont Yamaska) viewed from space.
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| Highest point | |
| Peak | Mont Megantic |
| Elevation | 1,105 m (3,625 ft) |
| Geography | |
| Country | Canada |
| Province | Quebec |
| Range coordinates | 45°28.7′N 73°2.4′W / 45.4783°N 73.0400°WCoordinates: 45°28.7′N 73°2.4′W / 45.4783°N 73.0400°W |
| Geology | |
| Age of rock | Early Cretaceous |
The Monteregian Hills (French: Collines Montérégiennes) is a linear chain of isolated hills in Montreal and Montérégie, between the Laurentians and the Appalachians.
The 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 hills of similar geology in the Saint Lawrence Lowlands as the "Royal Mountains" (French: montagnes royales). Other hills in the chain included Mont Saint-Bruno, Mont Saint-Hilaire, Mont Saint-Grégoire, Mont Rougemont, Mont Yamaska, Mont Shefford, and Mont Brome.
It was only later that Mont Mégantic, the Oka Hills, as well as the Saint-André and d'Iberville formations, were added to the list.
Each hill 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 hills have dark-coloured mafic rock such as gabbro and essexite; some also have large areas of pulaskite, syenite, and other light-coloured rock.
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