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Synform
In structural geology, a syncline is a fold with younger layers closer to the center of the structure, whereas an anticline is the inverse of a syncline. A synclinorium (plural synclinoriums or synclinoria) is a large syncline with superimposed smaller folds. Synclines are typically a downward fold (synform), termed a synformal syncline (i.e. a trough), but synclines that point upwards can be found when strata have been overturned and folded (an antiformal syncline). Characteristics On a geologic map, synclines are recognized as a sequence of rock layers, with the youngest at the fold's center or ''hinge'' and with a reverse sequence of the same rock layers on the opposite side of the hinge. If the fold pattern is circular or elongate, the structure is a basin. Folds typically form during crustal deformation as the result of compression that accompanies orogenic mountain building. Notable examples * Powder River Basin, Wyoming, US * Sideling Hill roadcut along Intersta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southland Syncline
The Southland Syncline is a major geological structure located in the Southland, New Zealand, Southland Region of New Zealand's South Island. The syncline folds the Mesozoic Greywacke, greywackes of the Stratigraphy of New Zealand, Murihiku Terrane. The northern limb of the fold is steep to overturned, while the southern limb dips shallowly to the northeast. The axial plan dips to the northeast and the axis plunges to the southeast. The Murihiku Terrane is formed predominantly from Permian to Jurassic sedimentary rocks with minor igneous intrusions, and is marked by prominent strike ridges particularly on its northern limb due to the steeper dip. These are created from the erosion of alternating strata of sandstone and mudstone. The northern edge of this fold system is marked by the Murihiku Escarpment, at the southern extreme of the Waimea Plains. Many of the names of stage (geology), stages and epoch (geology), epochs in the Permian, Triassic, and Jurassic periods in the New Ze ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Provo Canyon
Provo Canyon is located in unincorporated Utah County and Wasatch County, Utah. Provo Canyon runs between Mount Timpanogos on the north and Mount Cascade on the south. The canyon extends from Orem on the west end to Heber City on the east. Provo Canyon is situated to the east of Utah Valley and grants access to the valleys and Uinta Basin regions that lie beyond the Wasatch front. Through forces of erosion, the Provo River has carved out the canyon over time. Attractions in Provo Canyon include Vivian Park, Sundance, and Bridal Veil Falls. The canyon is known for both its natural attractions and practical uses. Deer Creek Reservoir serves as water storage for Salt Lake and Utah Valleys. Provo Canyon has served as a route of transportation between the valleys to the east and west of the Wasatch mountain range. The Heber Valley Historic Railroad operates passenger trains through the canyon. U.S. route 189 connects Provo and Orem with Heber City to the east. In early settl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afikpo
Ehugbo often referred to as Afikpo, is the second largest urban area in Ebonyi State, Nigeria. It is the headquarters of the Afikpo North Local Government Area. It is situated in the southern part of Ebonyi State and is bordered to the north by the town of Akpoha, to the south by Unwana, to the south west by Edda LGA, to the east by the Cross River State and to the west by Amasiri town. Afikpo spans an area approximately . It is located on 6 degrees north latitude and 8 degrees east longitude. Afikpo is a hilly area despite occupying a region low in altitude, which rises above sea level. It is a transitional area between open grassland and tropical forest and has an average annual rainfall of . The population of Afikpo is estimated at 156,611, according to the Nigerian 2006 Census. Climate Köppen-Geiger climate classification system classifies its climate as tropical wet and dry (Aw). File:IMG-20190114-WA0012.jpg, Ehugbo dancers File:Afikpo, Ebonyi State.jpg, Landscape ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also borders the state of Texas to the east and southeast, Oklahoma to the northeast, and shares Mexico-United States border, an international border with the Mexican states of Chihuahua (state), Chihuahua and Sonora to the south. New Mexico's largest city is Albuquerque, and its List of capitals in the United States, state capital is Santa Fe, New Mexico, Santa Fe, the oldest state capital in the U.S., founded in 1610 as the government seat of Santa Fe de Nuevo México, Nuevo México in New Spain. It also has the highest elevation of any state capital, at . New Mexico is the List of U.S. states and territories by area, fifth-largest of the fifty states by area, but with just over 2.1 million residents, ranks List of U.S. states and terri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Picuris Mountains
The Picuris Mountains are a mountain range in northern New Mexico. They are considered a subrange of the Sangre de Cristo Mountains. Geography The mountains are located to the east of Dixon and surround Picuris Pueblo to the west, north, and east. The range resembles a triangle with its base to the east, along the valley of the Rio Grande del Rancho. The northwest face lies along the valley of the Rio Grande and the southern face lies along Rio Pueblo and Embudo Creek. History The area was first visited by Europeans on July 13, 1598, when Juan de Oñate visited Picuris Pueblo. Geology The range is underlain by Precambrian rock beds of the Hondo Group and Vadito Group. It is the namesake for the Picuris orogeny. Economy Mining has been historically important in the Picuris Mountains. The Harding Pegmatite Mine was operated off and on from about 1900 to 1958, when it was donated to the University of New Mexico as an outdoor geological laboratory. At one time, the mine made ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hondo Group
The Hondo Group is a group of geologic formations that crops out in most of the Precambrian-cored uplifts of northern New Mexico. Detrital zircon geochronology gives a maximum age for the lower Hondo Group of 1765 to 1704 million years ( Mya), corresponding to the Statherian period. Geology The Hondo Group consists of a lower very clean quartzite (the Ortega Formation) and upper schists, quartzites, and slates. The total thickness is about .Montgomery 1953 The upper section is absent in the Tusas Mountains, where the Hondo Group is essentially synonymous with the Ortega Formation. The upper section is assigned to the Rinconada Formation in the Picuris Mountains. The most complete section is in the northern Picuris Mountains, where the Hondo Group fills an overturned syncline. Detrital zircon geochronology establishes an age for the lower Hondo Group of 1765 to 1704 Mya.Jones ''et al.'' 2011 The Pilar and Piedra Lumbre Formations were originally included in the Hondo Grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Valley (Virginia)
Fort Valley is a mountain valley located primarily in Shenandoah County, Virginia. It is often called "valley within a valley" as it lies between the two arms of the northern part of the Blue Ridge Mountain range in the Shenandoah Valley in the Ridge-and-Valley Appalachians geological zone. Overview The eastern ridgeline of Fort Valley is named Massanutten Mountain and is continuous for the eastern length of Fort Valley, with a short stretch called Waterfall Mountain in the extreme south of the valley. The western ridgeline of the valley, also part of the greater Massanutten range, is composed primarily of three named mountains, from north to south: Three Top Mountain, Powell Mountain and Short Mountain. Additionally, behind Three Top and Powell mountains another ridgeline in the chain is called Green Mountain, which is actually higher in elevation than the 3 westernmost named mountains and between which is a smaller highland valley, called Little Fort Valley. The far southern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australia
South Australia (commonly abbreviated as SA) is a States and territories of Australia, state in the southern central part of Australia. With a total land area of , it is the fourth-largest of Australia's states and territories by area, which includes some of the most arid parts of the continent, and with 1.8 million people. It is the fifth-largest of the states and territories by population. This population is the second-most highly centralised in the nation after Western Australia, with more than 77% of South Australians living in the capital Adelaide or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 26,878. South Australia shares borders with all the other mainland states. It is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria (state), Victoria, and to the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flinders Ranges
The Flinders Ranges are the largest mountain ranges in South Australia, which starts about north of Adelaide. The ranges stretch for over from Port Pirie to Lake Callabonna. The Adnyamathanha people are the Aboriginal group who have inhabited the range for tens of thousands of years. Its most well-known landmark is Wilpena Pound / Ikara, a formation that creates a natural amphitheatre covering and containing the range's highest peak, St Mary Peak (). The ranges include several national parks, the largest being the Ikara-Flinders Ranges National Park, as well as other protected areas. It is an area of great geological and palaeontological significance, and includes the oldest fossil evidence of animal life was discovered. The Ediacaran Period and Ediacaran biota take their name from the Ediacara Hills within the ranges. In August 2022, a nomination for the Flinders Ranges to be named a World Heritage Site was lodged. History Traditional owners The first humans to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilpena Pound
Wilpena Pound ("Ikara" in the Adnyamathanha language) is a major natural amphitheatre of mountains located north of Adelaide, South Australia, Australia in the heart of the Ikara-Flinders Ranges National Park. Its fringe is accessible by a sealed road between the towns of Hawker, South Australia, Hawker to the south and Blinman, South Australia, Blinman in the northern Flinders Ranges, South Australia, Flinders Ranges. It was used for grazing from the mid-nineteenth century to the mid-twentieth century and for cropping in the early twentieth century. Its tourism potential was recognised in 1949. Geomorphology The area is part of the Adelaide Geosyncline. Early amateur theories mistakenly suggested Wilpena Pound was an ancient volcano. The Pound is a syncline, synclinal basin with the fold axis running NNW-SSE through Edeowie Gorge at the northern end and Rawnsley's Bluff at the southern. A corresponding anticline is located in the adjacent Moralana Gorge with the Elder Range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strathmore, Angus
Strathmore () is a broad valley or strath in east-central Scotland, lying between the Grampian Mountains (Scotland), Grampian mountains and the Sidlaws. It is approximately long and wide. Strathmore is underlain by Old Red Sandstone but this is largely obscured by glacial till, sands and gravels deposited during the ice age. Its northeast to southwest alignment is influenced by the underlying geological structure of the area which reflects the dominant Caledonian Orogeny, Caledonian trend of both the central lowlands and the Highlands of Scotland; its northern margin reflects the presence of the Highland Boundary Fault. Strathmore is fertile and has some of Scotland's best arable farmland, producing soft fruits and cereals. History The Romans established a series of castrum, marching camps in Strathmore as they moved northwards through the valley. Other antiquities include Pictish stones such as the Eassie Stone. The Earl of Strathmore takes his title from the valley, and hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
