|
Riverin River
The Riverin River () is a river in the Côte-Nord region of the province of Quebec, Canada. It is a tributary of the Gulf of Saint Lawrence. There is a small hydroelectric power plant near the mouth of the river. Location The Riverin River is in Port-Cartier, Sept-Rivières, Quebec. The river is fed by a few relatively small lakes, including Lac Riverin in the canton of Grenier. It flows southward, with many rapids. At its mouth, it flows under Quebec Route 138 and into the Saint Lawrence just north of the community of Rivière-Pentecôte. of the river basin, or 26.5%, is in the Port-Cartier–Sept-Îles Wildlife Reserve. At the mouth of the river the average annual temperature is and the average annual rainfall is . Climate models indicate that further inland the average annual temperature would be and the average annual rainfall would be . Name The Pessamit Innu, called Riverin by the Europeans, hunted and fished by the river until around 1900. The name of the river, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Côte-Nord
Côte-Nord (Region 09) (, ; ) is an List of regions of Quebec, administrative region of Quebec, on the Quebec-Labrador peninsula, Quebec-Labrador Peninsula, Canada. The region runs along the St. Lawrence River and then the Gulf of St. Lawrence, from Tadoussac to the limits of Labrador, leaning against the Saguenay–Lac-Saint-Jean to the west, the Côte-Nord penetrates deep into Nord-du-Québec, Northern Quebec. With the motto: ''Between nature and grandeur'', the Côte-Nord is made up of 99% public land, it is the second largest region after Nord-du-Québec, which occupies 51% of Quebec's territory. History The origins of the settlement of the Côte-Nord precede by a few millennia the population movements that began in the middle of the 19th century. Archaeology, Archaeologists tell us that the main prehistoric cultures, called "Archaic humans, archaic", were based on three sets of groups coming from the southwest, from as far away as the Great Lakes by the St. Lawrence Rive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentecôte River
The Pentecôte River (, ) is a river in the Côte-Nord region or the province of Quebec, Canada. It is a tributary of the Gulf of Saint Lawrence, which it enters beside the community of Rivière-Pentecôte. Location and name The Pentecôte River is an important river in the Port-Cartier–Sept-Îles Wildlife Reserve. It is in the municipality of Port-Cartier in the Sept-Rivières Regional County Municipality, Côte-Nord, Quebec. In the Innu language the river was called ''Mistecapiu'', meaning "Steep Rock". The present name may be attributed to the fact that Jacques Cartier arrived in the area on the Christian holy day of Pentecost (''Pentecôte'' is French for Pentecost). There is a reference to the river in a document by Louis Jolliet from 1685 in which he refers to a river named "Pannecoste". A 1695 map by Deshayes shows the "Rivière de la Pentecoste". In 1744 the cartographer Bellin wrote "R. Michigabiou or R. de la Pentecôte; it is also called R. Sainte Marguerite." Envi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goldthwait Sea
The Goldthwait Sea was a sea that emerged during the last deglaciation, starting around 13,000 years ago, covering what is now the Gulf of Saint Lawrence and surrounding areas. At that time, the land had been depressed under the weight of the Laurentide Ice Sheet, which was up to thick. Areas on the Anticosti Island and low-lying regions of Quebec and the Maritimes bordering the Saint Lawrence were below sea level. As the land rebounded over the next 3,000 years, despite rising sea levels the sea retreated to roughly the present boundaries of the Gulf. Name The term "Goldthwait Sea" was proposed by Elson in 1969 to distinguish the area from the Champlain Sea and the Laflamme Sea. The sea is named after the geologist James Walter Goldthwait (1880–1947). He did impressive work for the Geological Survey of Canada in the east of the country, and in Quebec in particular, despite handicaps such as lack of aerial photographs or detailed topographical maps. The quality of his observat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pegmatite
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than and sometimes greater than . Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are known. Many of the world's largest crystals are found within pegmatites. These include crystals of microcline, quartz, mica, spodumene, beryl, and tourmaline. Some individual crystals are over long. Most pegmatites are thought to form from the last fluid fraction of a large crystallizing magma body. This residual fluid is highly enriched in volatiles and trace elements, and its very low viscosity allows components to migrate rapidly to join an existing crystal rather than coming together to form new crystals. This allows a few very large crystals to form. While most pegmatites have a simple composition of minerals common in ordinary igneous rock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dike (geology), dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF diagram, QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Migmatite
Migmatite is a composite rock (geology), rock found in medium and high-grade metamorphic environments, commonly within Precambrian craton, cratonic blocks. It consists of two or more constituents often layered repetitively: one layer is an older metamorphic rock that was reconstituted subsequently by partial melting ("paleosome"), while the alternate layer has a Pegmatite, pegmatitic, Aplite, aplitic, Granite, granitic or generally plutonic appearance ("neosome"). Commonly, migmatites occur below deformed metamorphic rocks that represent the base of eroded mountain chains. Migmatites form under extreme temperature and pressure conditions during Metamorphism#Prograde and retrograde, prograde metamorphism, when partial melting occurs in metamorphic paleosome. Components Solid solution, exsolved by partial melting are called neosome (meaning ‘new body’), which may or may not be heterogeneous at the microscopic to macroscopic scale. Migmatites often appear as tightly, incoheren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diorite
Diorite ( ) is an intrusive rock, intrusive igneous rock formed by the slow cooling underground of magma (molten rock) that has a moderate content of silica and a relatively low content of alkali metals. It is Intermediate composition, intermediate in composition between low-silica (mafic) gabbro and high-silica (felsic) granite. Diorite is found in mountain-building belts (''orogens'') on the margins of continents. It has the same composition as the fine-grained volcanic rock, andesite, which is also common in orogens. Diorite has been used since prehistoric times as decorative stone. It was used by the Akkadian Empire of Sargon of Akkad for funerary sculptures, and by many later civilizations for sculptures and building stone. Description Diorite is an intrusive rock, intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar (typically andesine), biotite, hornblende, and sometimes pyroxene. The chemical composition of diorite is Intermedia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granodiorite
Granodiorite ( ) is a coarse-grained (phaneritic) intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar. The term banatite is sometimes used informally for various rocks ranging from granite to diorite, including granodiorite. The term ''granodiorite'' was first used by George F. Becker, G. F. Becker (1893) to describe granitic rocks in the Sierra Nevada, United States. Composition According to the QAPF diagram, granodiorite has a greater than 20% quartz by volume, and between 65% and 90% of the feldspar is plagioclase. A greater amount of plagioclase would designate the rock as tonalite. Granodiorite is felsic to intermediate composition, intermediate in composition. It is the Intrusive rock, intrusive igneous equivalent of the extrusive igneous dacite. It contains a large amount of sodium (Na) and calcium (Ca) rich plagioclase, potassium feldspar, quartz, and minor amounts of muscovite mica as the lighter colored miner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monzonite
Monzonite is an igneous intrusive rock, formed by slow cooling of underground magma that has a moderate silica content and is enriched in alkali metal oxides. Monzonite is composed mostly of plagioclase and alkali feldspar. Syenodiorite is an obsolescent term for monzonite or for monzodiorite.Le Maitre, R.W., ''Igneous Rocks: A Classification and Glossary of Terms'' Cambridge University Press, 2nd ed, pp. 113 Larvikite is a particular form of monzonite. Description Monzonite is a coarse-grained ( phaneritic) igneous rock. Such rocks are classified by their relative percentages of quartz, plagioclase, alkali feldspar, and feldspathoid (the QAPF classification). Monzonite is defined as rock having less than 5% quartz in its QAPF fraction and in which alkali feldspar makes up between 35% and 65% of the total feldspar content. If quartz constitutes greater than 5% of the QAPF fraction, the rock is termed a quartz monzonite, while if feldspathoids are present as up to 10% of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syenite
Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz, which, if present at all, occurs in relatively small concentrations (< 5%). It is considered a granitoid. Some syenites contain larger proportions of components and smaller amounts of material than most granites; those are classed as being of . The |
Norite
Norite is a mafic Intrusive rock, intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine. The name ''norite'' is derived from Norway, by its Norwegian name ''Norge''. Norite, also known as orthopyroxene gabbro, may be essentially indistinguishable from gabbro without thin section study under the petrographic microscope. The principal difference between norite and gabbro is the type of pyroxene of which it is composed. Norite is predominantly composed of orthopyroxenes, largely high-magnesian enstatite or an iron-bearing hypersthene. The principal pyroxenes in gabbro are clinopyroxenes, generally iron-rich augites. Norite occurs with gabbro and other mafic to ultramafic rocks in layered intrusions which are often associated with platinum orebodies such as in the Bushveld Igneous Complex in South Africa, the Skaergaard intrusion, Skaergaard igneous complex of Greenland, and the Stillwater igneous complex in Montana. Norite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gabbro
Gabbro ( ) is a phaneritic (coarse-grained and magnesium- and iron-rich), mafic intrusive igneous rock formed from the slow cooling magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt. Much of the Earth's oceanic crust is made of gabbro, formed at mid-ocean ridges. Gabbro is also found as plutons associated with continental volcanism. Due to its variant nature, the term ''gabbro'' may be applied loosely to a wide range of intrusive rocks, many of which are merely "gabbroic". By rough analogy, gabbro is to basalt as granite is to rhyolite. Etymology The term "gabbro" was used in the 1760s to name a set of rock types that were found in the ophiolites of the Apennine Mountains in Italy. It was named after Gabbro, a hamlet near Rosignano Marittimo in Tuscany. Then, in 1809, the German geologist Christian Leopold von Buch used the term more restrictively in his d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
