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Lake Circle
Lake Circle was a glacial lake that formed during the late Pleistocene epoch along the Redwater River in eastern Montana. After the Laurentide Ice Sheet retreated, glacial ice melt accumulated in the basin surrounded by the ridges of the preglacial valley and the retreating glacier. Southwest of Nickwall are the remnants of a broad abandoned valley with long side slopes. The valley runs north from Redwater Creek to the Missouri River. The bottom is poorly drained and about in width. It lies above the sea level and above the Missouri River bottomland. The upland slopes are extensive, clear and flat. The valleys surrounding it are dissected with V-shaped coulees. The difference between the Redwater valley and those around it reflect stream erosion vs. lake sedimentation. The drift in the valleys, appears to be as left by the glacier in the previously created valleys. Using the dating of lake deposits near Great Falls, Montana, the Havre lobe of the Laurentide Ice Sheet damm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McCone County, Montana
McCone County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 1,729. Its county seat is Circle. The county was created in 1919. It was named for State Senator George McCone, who had been one of the first county commissioners of Dawson County. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (1.5%) is water. Major highways * Montana Highway 13 * Montana Highway 24 * Montana Highway 200 Adjacent counties * Valley County - west * Roosevelt County - north * Richland County - northeast * Dawson County - east * Prairie County - south * Garfield County - west National protected area * Charles M. Russell National Wildlife Refuge (part) Demographics 2000 census As of the 2000 census, of 2000, there were 1,977 people, 810 households, and 596 families living in the county. The population density was less than 1 people per square mile (0/km2), the 12th lowest in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweetgrass Hills
The Sweet Grass Hills (Blackfoot: ''kátoyissiksi'', Cheyenne: ''vé'ho'ôhtsévóse'', Salish: ''ččaɫalqn '', "three peaks") are a small group of low mountains rising more than 3,000 feet above the surrounding plains southwest of Whitlash, Montana in Liberty and Toole County, Montana. The tallest point in the hills is West Butte at . Quite prominent in the local area, they are clearly visible from US Highway 2 to the south, I-15, and can sometimes be seen as far North as the Crowsnest Highway ( Highway 3) near Medicine Hat in Alberta as well as from the West, near Glacier National Park and Browning, Montana. Other named peaks in the small group are Gold Butte (6,512 feet), East Butte (with two peaks, the taller of which at 6,958 ft), and Mount Lebanon (5807 ft). The Sweet Grass Hills are an example of the island ranges that dot the central third portion of the state of Montana. These island ranges, completely surrounded by the 'sea' of plains and not geographical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of North Dakota
The geology of North Dakota includes thick sequences oil and coal bearing sedimentary rocks formed in shallow seas in the Paleozoic and Mesozoic, as well as terrestrial deposits from the Cenozoic on top of ancient Precambrian crystalline basement rocks. The state has extensive oil and gas, sand and gravel, coal, groundwater and other natural resources. Geologic history, stratigraphy and tectonics North Dakota is underlain by Precambrian crystalline basement rock, although these rocks are less well understood than in neighboring states. In the Proterozoic, a mountain range known as the Western Dakota Mobile Belt formed between two billion and 1.8 billion years ago in connection with the Trans-Hudson orogeny, stretching north into Manitoba and Saskatchewan before eroding almost entirely 1.5 billion years ago, shedding sediments now found in the Montana Belt Supergroup. Commonly glacial erratic boulders are Precambrian rocks transported to the region by ice sheets. Paleozoic (541–25 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Former Lakes Of The United States
A former is an object, such as a template, gauge or cutting die, which is used to form something such as a boat's hull. Typically, a former gives shape to a structure that may have complex curvature. A former may become an integral part of the finished structure, as in an aircraft fuselage, or it may be removable, being using in the construction process and then discarded or re-used. Aircraft formers Formers are used in the construction of aircraft fuselage, of which a typical fuselage has a series from the nose to the empennage, typically perpendicular to the longitudinal axis of the aircraft. The primary purpose of formers is to establish the shape of the fuselage and reduce the column length of stringers to prevent instability. Formers are typically attached to longerons, which support the skin of the aircraft. The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, and was typical of light aircraft built until the ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Lake McKenzie
Before the Pleistocene Ice Age, circa two million years before present (YBP), the rivers in North, South Dakota and eastern Montana drained northeast into Canada and then into Hudson Bay.The Missouri River; John P. Bluemle; North Dakota Geological Survey; Bismarck, North Dakota; 02-Jan-2008 The Keewatin Lobe of the continental ice sheet, block the flow of water northward and impounded it along the ice front. Lakes formed, until the waters could find a new way to drain. Initially, the north flowing rivers followed the front of the glacier eastward and into a valley that passed between Garrison and Riverdale, to the Turtle Lake area, and on into Sheridan County. This is known as the preglacial McClean River. This valley became blocked by the glacier and the glacial lake identified as Lake McKenzie formed. Eventually, water level rose to crest the south ridge a point near Riverdale — at the site of the modern Garrison Dam and a diversion trench was cut. The modern Missouri Rive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Glendive
Glacial Lake Glendive was a glacial lake on the lower Yellowstone River. It formed in the valley of Yellowstone, during the late Pleistocene epoch south of the Keewatin Ice Sheet. As the ice sheet retreated northward, the lake drained into the modern Missouri River. Ice of the Keewatin Lobe of the Laurentide Ice Sheet advanced westward into the Missouri and Yellowstone river valleys. The Glasgow sublobe blocked the Missouri River west of present-day Fort Peck, Montana, and created Lake Jordan and glacial lakes Circle and Lambert were formed to the east. The Yellowstone lobe spread south past Intake, Montana, and formed glacial Lake Glendive. At its maximum the ice may have blocked the Little Missouri River forming glacial Lake Mikkelson.A.D. Howard 1960 When the ice sheet began to retreat northward, the southwestern margin of abandonment its previous drainages and lakes formed in the depression along the ice margins. Melting of the Shelby and Havre lobes in western Montan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Jordan (Montana)
Lake Jordan was a glacial lake formed during the late Pleistocene along the Jordan River. After the Laurentide Ice Sheet retreated, water melting off the glacier accumulated between the Rocky Mountains and the ice sheet. The lake drained along the front of the ice sheet, eastward towards the Yellowstone River and Glacial Lake Glendive. From the lake deposits near Great Falls, Montana, the Havre lobe of the Laurentide Ice Sheet dammed the ancestral Missouri River during the late Wisconsin Glacial Period.Geologic Framework and Glaciation of the Central Area, 1-1-2006; Christopher L. Hill; Boise State University, Boise, Idaho; 2006 Glacial Event A lobe of the late Wisconsin Laurentide Ice Sheet advanced from central Alberta, southeastward into Montana and southwestern Saskatchewan. It left the Cypress Hills and Boundary Plateau undisturbed. As the glacier crossed the present day Milk River valley in southern Alberta, it was split into two lobes by the Sweetgrass Hills, which be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Musselshell
The basin that held Pleistocene Lake Musselshell is in the lower (north-flowing) reach of the river. It is underlain mostly by highly erodible Cretaceous Colorado shale, Montana group sandstone, siltstone and shale, and Hell Creek sandstone and shale. The bedrock is gently folded and affected by local faults and joints. There is a sequence of nine terraces and more than 100 glacial boulders. The terraces are older than the erratics as the erratics rest on the terraces.Extent and Timing of Laurentide Glacial Lake Musselshell, Central Montana; Nicole Kristina Davis; Montana State University; Bozeman, Montana; July 2004 Glacial stages Advancing out of Alberta a lobe of the late Wisconsin Laurentide Ice Sheet advanced southeastward into east and central Montana and southwestern Saskatchewan, leaving the Cypress Hills and Boundary Plateau unglaciated. As the Laurentide ice crossed the area of the present day Milk River valley in southern Alberta, it was divided into two lobes by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Great Falls
Lake Great Falls was a prehistoric proglacial lake which existed in what is now central Montana in the United States between 15,000 BCE and 11,000 BCE.Hill, Christopher L. and Valppu, Seppo H. "Geomorphic Relationships and Paleoenvironmental Context of Glaciers, Fluvial Deposits, and Glacial Lake Great Falls, Montana." ''Current Research in the Pleistocene.'' 14 (1997); Hill, Christopher L. "Pleistocene Lakes Along the Southwest Margin of the Laurentide Ice Sheet." ''Current Research in the Pleistocene.'' 17 (2000); Hill, Christopher L. and Feathers, James K. "Glacial Lake Great Falls and the Late-Wisconsin-Episode Laurentide Ice Margin." ''Current Research in the Pleistocene.'' 19 (2002)Reynolds, Mitchell W. and Brandt, Theodore R. ''Geologic Map of the Canyon Ferry Dam 30' x 60' Quadrangle, West-Central Montana: U.S. Geological Survey Scientific Investigations Map 2860, scale 1:100,000.''Scientific Investigations Map 2860. Washington, D.C.: U.S. Geologic Survey, 2005. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Chouteau
Lake Chouteau was a glacial lake formed during the late Pleistocene along the Teton River. After the Laurentide Ice Sheet retreated, water melting off the glacier accumulated between the Rocky Mountains and the ice sheet. The lake drained along the front of the ice sheet, eastward towards the Judith River and the Missouri River. The maximum advance of the Laurentide Ice Sheet blocked the drainages of north- and east-flowing rivers, forming glacial lakes along the margin of the ice. On the western Montana plains the Shelby lobe blocked the Cutbank_and_Choteau._The_ilk_River,_creating_glacial_Lake_Twin_River._Tributaries_of_the_Marias_River_were_also_blocked_by_the_Shelby_lobe,_leading_to_the_formation_of_glacial_lakes_Lake_Cut_Bank">Cutbank_and_Choteau._The_Loma,_Montana">Loma_sublobe_blocked_the_Missouri_River.html" "title="Loma,_Montana.html" ;"title="Lake_Cut_Bank.html" "title="Marias_River.html" ;"title="ilk River, creating glacial Lake Twin River. Tributaries of the Marias ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Cut Bank
Lake Cut Bank was a glacial lake formed during the late Pleistocene along the Missouri and Sun Rivers. After the Laurentide Ice Sheet retreated, water melting off the glacier accumulated between the Rocky Mountinas and the ice sheet. The lake drained along the front of the ice sheet, eastward towards the Judith River and the Missouri River. The front of the Keewatin ice sheet completely blocked the valley of Cut Bank Creek so that for the ice dam was bordered by the water of an extensive lake, which has been designated glacial Lake Cut Bank. It is defined by the granitic pebbles and boulders on top of the hills southeast of Cut Bank and are present at several places in the basin farther north and west all below . The pebbles were deposited from icebergs floating on the lake. The lake bottom is identified by the laminated silts over the flatter parts of the basin. The silts are up to as seen in some of the coulees. Additionally, stratified sand and gravel are visible in the b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Prehistoric Lakes
This a partial list of prehistoric lakes. Although the form of the names below differ, the lists are alphabetized by the identifying name of the lake (e.g., Algonquin for Glacial Lake Algonquin). YBP = Years Before Present. North America Endorheic basins * Estancia Valley, Central New Mexico, United States ** Lake Estancia, glacial paleolake that once hosted cutthroat trout * Plains of San Agustín, Central New Mexico, United States ** Lake San Agustín, present day site of the Very Large Array * Tularosa basin, Southern New Mexico, United States ** Lake Otero ** Lake Lucero; Once much larger, the present day lake is an alkali lake and the main source of gypsum for White Sands National Park, the largest gypsum dune field in the world. * Great Basin ** Mono Lake Lee Vining, California. Rapidly shrinking due to Los Angeles Department of Water and Power damming tributaries. Atlantic Drainage * St. Lawrence River drainage, i.e., the Great Lakes ** Champlain Sea; 11,800 – 8, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
