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Misquah Hills
The Misquah Hills are a range of mountains in northeastern Minnesota, in the United States. They are located in or near the Boundary Waters Canoe Area Wilderness within Superior National Forest. Eagle Mountain, the highest point in Minnesota at , is considered to be part of the Misquah Hills. Geography The Misquah Hills are oriented east-to-west, north of the Brule River valley,Berkey, Chas P. "Preliminary Report of the Levelling Party." ''Annual Report, for the Year 1881.'' Ed. Winchell, N. H. Geological and Natural History Survey of Minnesota. p. 135. St. Paul, 1882. and south of Cross Lake and Winchell Lake. Their peaks are all within four miles east and seven miles west of Misquah Lake, and include several of the highest points in Minnesota. More broadly, the term has been used to include the ridges and monadnocks to the south of the Brule as well. Point 2260, Gaskin Mountain (2245 ft), and Point 2230 (misidentified by Grant and Winchell as the highest point in the st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ojibwe Language
Ojibwe ( ), also known as Ojibwa ( ), Ojibway, Otchipwe,R. R. Bishop Baraga, 1878''A Theoretical and Practical Grammar of the Otchipwe Language''/ref> Ojibwemowin, or Anishinaabemowin, is an Indigenous languages of the Americas, indigenous language of North America of the Algonquian languages, Algonquian language family.Goddard, Ives, 1979.Bloomfield, Leonard, 1958. The language is characterized by a series of dialects that have local names and frequently local writing systems. There is no single dialect that is considered the most prestigious or most prominent, and no standard writing system that covers all dialects. Dialects of Ojibwemowin are spoken in Canada, from southwestern Quebec, through Ontario, Manitoba and parts of Saskatchewan, with outlying communities in Alberta;Nichols, John, 1980, pp. 1–2. and in the United States, from Michigan to Wisconsin and Minnesota, with a number of communities in North Dakota and Montana, as well as groups that were removed to Kansas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brule Mountain
Brule, Brulé or Brûlé may refer to: Native American * Brulé, or Sicangu, a branch of the Lakota nation * Brulé (band), a Native American World Beat Places Canada * Brule, Alberta, hamlet in Alberta * Brule, Nova Scotia, a community in Nova Scotia United States * Brule, Wisconsin, a town, US * Brule (community), Wisconsin, an unincorporated community, US * Brule, Nebraska, US * Brule River, forming a portion of the boundary between Michigan and Wisconsin * Brule River (Minnesota) * Bois Brule River in Wisconsin, also known as the Brule River * Brule County, South Dakota People * André Brulé (1879–1953), a French theatre and film actor * Aurélien Brulé (b. 1979), French founder of Kalaweit Project * Étienne Brûlé ( – ), French explorer of North America * Gace Brulé ( – after 1213), French poet-composer * Gilbert Brulé (born 1987), Canadian ice hockey player * Jean-Marc Brûlé (born 1965), a French politician * Jean-Philippe Brulé (born 1981), a field hockey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laurentian Mountains
The Laurentian Mountains, also known as the Laurentians or Laurentides, are a mountain range in Canada. The range is long and ranges in height from with peaks over . The Laurentian Mountains extend across Labrador and Quebec within the Laurentian Upland, which contains foothills in northeastern Ontario. The range is located near the rivers of Ottawa River, Ottawa, St. Lawrence River, St. Lawrence, and Saguenay River, Saguenay. The Laurentian Mountains primarily stretch across multiple regions in Quebec, with geologic formations such as the Jacques-Cartier Massif located within the range. The Laurentians Mountains are one of the oldest mountain ranges on earth. The range formed around one billion years ago during the Grenville orogeny, in which the Grenville Province formed, a subdivision of the Canadian Shield. During that time, Laurentia, the geologic core of the Canadian Shield, collided with other continents and formed Precambrian rocks which extend across the range. The mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoproterozoic
The Mesoproterozoic Era is a geologic era that occurred from . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives. Continents existed during the preceding era (the Paleoproterozoic), but little is known about them. The continental masses of the Mesoproterozoic were more or less the same ones that exist today, although their arrangement on the Earth's surface was different. Major events and characteristics The major events of this era are the breakup of the Columbia supercontinent, the formation of the Rodinia supercontinent, and the evolution of sexual reproduction. This era is marked by the further development of continental plates and plate tectonics. The supercontinent of Columbia broke up between 1500 and 1350 million years ago, and the fragments reassembled into the supercontinent of Rodinia around 1100 to 900 million years ago, on the time boundary between the Mesoproterozoic and the subsequent Neoprot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ma (unit)
A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) are more exact. The modern calendar year, as reckoned according to the Gregorian calendar, approximates the tropical year by using a system of leap years. The term 'year' is also used to indicate other periods of roughly similar duration, such as the lunar year (a roughly 354-day cycle of twelve of the Moon's phasessee lunar calendar), as well as periods loosely associated with the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monzodiorite
Monzodiorite is an intrusive rock with a composition intermediate between diorite and monzonite. It is defined in the QAPF classification as coarse-grained igneous rock in which quartz makes up 0% to 5% of the QAPF mineral fraction, plagioclase Plagioclase ( ) is a series of Silicate minerals#Tectosilicates, tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continu ... makes up 65% to 90% of the total feldspar content, and the plagioclase is sodium-rich (% An < 50). References Plutonic rocks {{igneous-rock-stub ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz Monzonite
Quartz monzonite is an intrusive, felsic, igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars. It is typically a light colored phaneritic (coarse-grained) to porphyritic granitic rock. The plagioclase is typically intermediate to sodic in composition, andesine to oligoclase. Quartz is present in significant amounts. Biotite and/or hornblende constitute the dark minerals. Because of its coloring, it is often confused with granite, but whereas granite contains more than 20% quartz, quartz monzonite is only 5–20% quartz. Rock with less than five percent quartz is classified as monzonite. A rock with more alkali feldspar is a syenite whereas one with more plagioclase is a quartz diorite.Classification of Igneous Rocks The fine grained |
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] |
Midcontinent Rift
The Midcontinent Rift System (MRS) or Keweenawan Rift is a long geological rift in the center of the North America, North American continent and south-central part of the North American plate. It formed when the continent's core, the North American craton, began to split apart during the Mesoproterozoic era of the Precambrian, about 1.1 billion years ago. aulacogen, The rift failed, leaving behind thick layers of igneous rock that are exposed in its northern reaches, but buried beneath later sedimentary formations along most of its western and eastern arms. Those arms meet at Lake Superior, which is contained within the rift valley. The lake's North Shore (Lake Superior), north shore in Ontario and Minnesota defines the northern arc of the rift. From the lake, the rift's eastern arm trends south to central lower Michigan, and possibly into Indiana, Ohio, Kentucky, Tennessee, and Alabama. The western arm runs from Lake Superior southwest through portions of Wisconsin, Minnesota, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian
The Precambrian ( ; or pre-Cambrian, sometimes abbreviated pC, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinized name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian is an informal unit of geologic time, subdivided into three eons ( Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga) to the beginning of the Cambrian Period, about million years ago ( Ma), when hard-shelled creatures first appeared in abundance. Overview Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granophyre
Granophyre ( ; from ''granite'' and ''porphyry'') is a subvolcanic rock that contains quartz and alkali feldspar in characteristic angular intergrowths such as those in the accompanying image. The texture is called granophyric. The texture can be similar to micrographic texture and to the coarser graphic intergrowths of quartz and alkali feldspar common in pegmatite. These textures document simultaneous crystallization of quartz and feldspar from a silicate melt at the eutectic point, perhaps in the presence of a water-rich phase. They may also be formed by crystallization when the magma is significantly undercooled, not necessarily under eutectic conditions. Granophyres typically are intrusive rocks that crystallized at shallow depths, and many have compositions similar to those of granites. A common occurrence of granophyre is within layered igneous intrusions dominated by rocks with compositions like that of gabbro. In such occurrences, the granophyre may form as an end pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adirondack Mountains
The Adirondack Mountains ( ) are a massif of mountains in Northeastern New York which form a circular dome approximately wide and covering about . The region contains more than 100 peaks, including Mount Marcy, which is the highest point in New York at . The Adirondack High Peaks, a traditional list of 46 peaks over , are popular hiking destinations. There are over 200 named lakes with the number of smaller lakes, ponds, and other bodies of water reaching over 3,000. Among the named lakes around the mountains are Lake George, Lake Placid, and Lake Tear of the Clouds. The region has over of river. Although the mountains are formed from ancient rocks more than 1 billion years old, geologically, the mountains are relatively young and were created during recent periods of glaciation. Because of this, the Adirondacks have been referred to as "new mountains from old rocks." It is theorized that there is a hotspot beneath the region, which causes continued uplift at the rate of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
