|
Right Fork Canyon
Right Fork Canyon is a major branch of Lamoille Canyon, located in the Ruby Mountains of Elko County, in the northeastern section of the state of Nevada in the western United States. Approximately 5 miles (8 km) in length, it was extensively sculpted by glaciers in previous ice ages. none, 450px, Mt. Fitzgerald and Upper Right Fork Canyon The canyon begins at the summit of Mount Fitzgerald at an elevation of 11,215 feet (3418 m), and quickly descends to its nearly level upper section. It is here that the greatest evidence for glacial sculpturing can be found. The canyon shows a classic U-shaped cross section, and many patches of bare granite still retain the dark patina and striations caused by direct contact with the lower surface of the glacier that once filled this valley. left, 350px, Glacial patina and striations in Upper Right Fork Canyon Far below the summit of Mt. Gilbert, the canyon then makes a dramatic drop and sharp turn to enter its lower section. Nea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Fitzgerald (Nevada)
Mount Fitzgerald is the fourth-highest named mountain in the Ruby Mountains and the fifth-highest in Elko County, in the U.S. state of Nevada. It is the thirty-ninth-highest mountain in the state. It rises from the heads of both Thomas and Right Fork Canyons (branches of Lamoille Canyon), and is also part of the north wall of Box Canyon, making it a true glacial horn A pyramidal peak, sometimes called a glacial horn in extreme cases, is an angular, sharply pointed mountain peak which results from the cirque erosion due to multiple glaciers diverging from a central point. Pyramidal peaks are often examples o .... The summit is a high-level ridge and is located about southeast of the community of Elko, within the Ruby Mountains Wilderness of the Ruby Mountains Ranger District in the Humboldt-Toiyabe National Forest. References External links * Mountains of Elko County, Nevada Ruby Mountains Mountains of Nevada Humboldt–Toiyabe National Forest {{ElkoCou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Fault
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Gilbert (Nevada)
Mount Gilbert is the sixth-highest named mountain of the Ruby Mountains and the eighth-highest in Elko County, in Nevada, United States. It is the forty-third-highest mountain in the state. The peak is a spectacular part of the view from State Route 227 in Lamoille Valley, rising over above the valley floor at Lamoille. It rises from the head of Seitz Canyon, and is part of the west wall of Right Fork Canyon (a branch of Lamoille Canyon). The summit is a high glacial horn A pyramidal peak, sometimes called a glacial horn in extreme cases, is an angular, sharply pointed mountain peak which results from the cirque erosion due to multiple glaciers diverging from a central point. Pyramidal peaks are often examples o ..., located about southeast of the community of Elko within the Ruby Mountains Ranger District of the Humboldt-Toiyabe National Forest. References Ruby Mountains Mountains of Elko County, Nevada Mountains of Nevada Humboldt–Toiyabe National Forest< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2012-06-20 View South Up Right Fork Canyon In Nevada From The Northeast Wall Of Lamoille Canyon
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Striations
Glacial striations or striae are scratches or gouges cut into bedrock by glacial abrasion. These scratches and gouges were first recognized as the result of a moving glacier in the late 18th century when Swiss alpinists first associated them with moving glaciers. They also noted that if they were visible today that the glaciers must also be receding. Glacial striations are usually multiple, straight, and parallel, representing the movement of the glacier using rock fragments and sand grains, embedded in the base of the glacier, as cutting tools. Large amounts of coarse gravel and boulders carried along underneath the glacier provide the abrasive power to cut trough-like ''glacial grooves''. Finer sediments also in the base of the moving glacier further scour and polish the bedrock surface, forming a ''glacial pavement''. Ice itself is not a hard enough material to change the shape of rock but because the ice has rock embedded in the basal surface it can effectively abrade the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaciated Valley
U-shaped valleys, also called trough valleys or glacial troughs, are formed by the process of glaciation. They are characteristic of mountain glaciation in particular. They have a characteristic U shape in cross-section, with steep, straight sides and a flat or rounded bottom (by contrast, valleys carved by rivers tend to be V-shaped in cross-section). Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring. When the ice recedes or thaws, the valley remains, often littered with small boulders that were transported within the ice, called glacial till or glacial erratic. Examples of U-shaped valleys are found in mountainous regions throughout the world including the Andes, Alps, Caucasus Mountains, Himalaya, Rocky Mountains, New Zealand and the Scandinavian Mountains. They are found also in other major European mountains including the Carpathian Mountains, the Pyrenees, the Rila and Pirin mountains in Bulgaria, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamoille Canyon
Lamoille Canyon is the largest valley in the Ruby Mountains, located in the central portion of Elko County in the northeastern section of the state of Nevada, in the western United States. Approximately in length, it was extensively sculpted by glaciers in previous ice ages. Lamoille Canyon begins at Liberty Peak at an elevation of . It quickly descends to a glacial basin now occupied by Lamoille Lake. A nearby granite shelf contains the picturesque Dollar Lakes. Further down the canyon is a large stand of Whitebark pine and the Road's End Trailhead, the high point () of Lamoille Canyon Road, which is a National Forest Scenic Byway. This is also the northern terminus of the Ruby Crest National Recreation Trail, and the start of the much shorter trail to Island Lake. Road's End is where Lamoille Canyon begins a sweeping turn around the flanks of Thomas Peak, . The glaciers have deeply carved the canyon, leaving a U-shaped cross section and, high on the side of Thomas Peak, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Age
An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and greenhouse periods, during which there are no glaciers on the planet. Earth is currently in the Quaternary glaciation. Individual pulses of cold climate within an ice age are termed ''glacial periods'' (or, alternatively, ''glacials, glaciations, glacial stages, stadials, stades'', or colloquially, ''ice ages''), and intermittent warm periods within an ice age are called '' interglacials'' or ''interstadials''. In glaciology, ''ice age'' implies the presence of extensive ice sheets in both northern and southern hemispheres. By this definition, Earth is currently in an interglacial period—the Holocene. The amount of anthropogenic greenhouse gases emitted into Earth's oceans and atmosphere is predicted to prevent the next glacial period for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaciation
A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The Last Glacial Period ended about 15,000 years ago. The Holocene is the current interglacial. A time with no glaciers on Earth is considered a greenhouse climate state. Quaternary Period Within the Quaternary, which started about 2.6 million years before present, there have been a number of glacials and interglacials. At least eight glacial cycles have occurred in the last 740,000 years alone. Penultimate Glacial Period The Penultimate Glacial Period (PGP) is the glacial period that occurred before the Last Glacial Period. It began about 194,000 years ago and ended 135,000 years ago, with the beginning of the Eemian interglacial. Last Glacial Period The last glacial period was the most recent glacial period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
