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Wescogame Formation
The (Upper) Late Pennsylvanian Wescogame Formation is a slope-forming, sandstone, red-orange geologic unit, formed from an addition of eolian sand, added to marine transgression deposits, (siltstones, etc.), and found throughout sections of the Grand Canyon, in Arizona, Southwest United States. It is one of the upper members of the Supai Group 'redbeds' (member three of four major units), with the Supai Group found in other sections of Arizona, especially in the Verde Valley region, or as a basement unit below the Mogollon Rim, just eastwards or part of the basement Supai Group of the southwest & south Colorado Plateau. Coeval units of Wescogame Formation and the Supai Group are replaced by geologic units formed from geology deposited in relationship to the former basin to the south-southeast in Arizona, the Pedregosa Basin, of the Pedregosa Sea, which extended northeast to the Verde Valley region, and the earlier deposition of the red rock sandstone of the Schnebly Hill Forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvanian (geology)
The Pennsylvanian ( , also known as Upper Carboniferous or Late Carboniferous) is, in the ICS geologic timescale, the younger of two subperiods (or upper of two subsystems) of the Carboniferous Period. It lasted from roughly . As with most other geochronologic units, the rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few hundred thousand years. The Pennsylvanian is named after the U.S. state of Pennsylvania, where the coal-productive beds of this age are widespread. The division between Pennsylvanian and Mississippian comes from North American stratigraphy. In North America, where the early Carboniferous beds are primarily marine limestones, the Pennsylvanian was in the past treated as a full-fledged geologic period between the Mississippian and the Permian. In parts of Europe, the Mississippian and Pennsylvanian are one more-or-less continuous sequence of lowland continental deposits and are grouped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Mountains (Arizona)
The White Mountains of Arizona is a mountain range and mountainous region in the eastern part of the state, near the border with New Mexico; it is a continuation from the west of the Arizona transition zone– Mogollon Rim, with the Rim ending in western New Mexico. The White Mountains are a part of the Colorado Plateau high country of Northeast Arizona, the Navajo Nation, with the rest of the Plateau in eastern Utah, northwest New Mexico, and southwestern Colorado. Nearby communities include Show Low, Pinetop-Lakeside, Greer, St. Johns, Springerville Springerville is a town in Apache County, Arizona, United States, within the White Mountains. Its postal ZIP Code is 85938. As of the 2010 census, the population of the town was 1,961. Springerville sits at an elevation of above sea level. A ..., Eagar, and McNary. Much of the range is within the Fort Apache Indian Reservation. The highest summit is Mount Baldy, with an elevation of . The mountains are drained to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antler Orogeny
The Antler orogeny was a tectonic event that began in the early Late Devonian with widespread effects continuing into the Mississippian and early Pennsylvanian. Most of the evidence for this event is in Nevada but the limits of its reach are unknown. A great volume of conglomeratic deposits of mainly Mississippian age in Nevada and adjacent areas testifies to the existence of an important tectonic event, and implies nearby areas of uplift and erosion, but the nature and cause of that event are uncertain and in dispute. Although it is known as an orogeny (mountain building event), some of the classic features of orogeny as commonly defined such as metamorphism, and granitic intrusives have not been linked to it. In spite of this, the event is universally designated as an orogeny and that practice is continued here. This article outlines what is known and unknown about the Antler orogeny and describes three current theories regarding its nature and origin. Two facies of lower P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antler Mountains
Antlers are extensions of an animal's skull found in members of the Cervidae (deer) family. Antlers are a single structure composed of bone, cartilage, fibrous tissue, skin, nerves, and blood vessels. They are generally found only on males, with the exception of reindeer/caribou. Antlers are shed and regrown each year and function primarily as objects of sexual attraction and as weapons. In contrast to antlers, horns—found on pronghorns and bovids, such as sheep, goats, bison and cattle—are two-part structures that usually do not shed. A horn's interior of bone is covered by an exterior sheath made of keratin (the same material as human fingernails and toenails). Etymology Antler comes from the Old French ''antoillier '' (see present French : "Andouiller", from'' ant-, ''meaning before,'' oeil, ''meaning eye and'' -ier'', a suffix indicating an action or state of being) possibly from some form of an unattested Latin word ''*anteocularis'', "before the eye" (and applie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wasatch Front
The Wasatch Front is a metropolitan region in the north-central part of the U.S. state of Utah. It consists of a chain of contiguous cities and towns stretched along the Wasatch Range from approximately Provo in the south to Logan in the north, and containing the cities of Salt Lake City, Bountiful, Layton, and Ogden. Geography The Wasatch Front is long and narrow. To the east, the Wasatch Mountains rise abruptly several thousand feet above the valley floors, climbing to their highest elevation of at Mount Nebo (bordering southern Utah Valley). The area's western boundary is formed by Utah Lake in Utah County, the Oquirrh Mountains in Salt Lake County, and the Great Salt Lake in northwestern Salt Lake, Davis, Weber, southeastern Box Elder, and Cache counties. Though most residents of the area live between Ogden and Provo (a distance of ), which includes Salt Lake City proper, the fullest built-out extent of the Wasatch Front is long and an average of wide. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsidence
Subsidence is a general term for downward vertical movement of the Earth's surface, which can be caused by both natural processes and human activities. Subsidence involves little or no horizontal movement, which distinguishes it from slope movement. Processes that lead to subsidence include dissolution of underlying carbonate rock by groundwater; gradual compaction of sediments; withdrawal of fluid lava from beneath a solidified crust of rock; mining; pumping of subsurface fluids, such as groundwater or petroleum; or warping of the Earth's crust by tectonic forces. Subsidence resulting from tectonic deformation of the crust is known as tectonic subsidence and can create accommodation for sediments to accumulate and eventually lithify into sedimentary rock. Ground subsidence is of global concern to geologists, geotechnical engineers, surveyors, engineers, urban planners, landowners, and the public in general.National Research Council, 1991. ''Mitigating losses from lan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watahomigi Formation
The Watahomigi Formation is a geologic formation in the Grand Canyon region of Arizona. It preserves fossils dating back to the Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ... period. See also * List of fossiliferous stratigraphic units in Arizona * Paleontology in Arizona References * Geologic formations of Arizona Natural history of the Grand Canyon Carboniferous Arizona Carboniferous System of North America {{Carboniferous-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permian
The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic Era. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the region of Perm in Russia. The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the sauropsids ( reptiles). The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these drier conditions, rose to dominance in place of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sycamore Canyon
Sycamore Canyon is the second largest canyon in the Arizona redrock country, after Oak Creek Canyon. The long scenic canyon reaches a maximum width of about . It is in North Central Arizona bordering and below the Mogollon Rim, and is located west and northwest of Sedona in Yavapai and Coconino counties. Description Sycamore Creek, a tributary of the Verde River, flows through the canyon. Sycamore Canyon enters the Verde River canyon north-northwest of Clarkdale. Located within three different U.S. National Forests, the Coconino, Kaibab, and Prescott National Forests, Sycamore Canyon is home to a variety of wildlife including black bear, deer, and mountain lion. Unlike the nearby and more heavily visited Oak Creek Canyon, much of Sycamore Canyon is protected by the Sycamore Canyon Wilderness, located at , and therefore roads and developed campgrounds are nonexistent. Hiking and horseback riding are the only ways to visit the canyon. The most popular access is via the Pars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oak Creek Canyon
Oak Creek Canyon is a river gorge located in northern Arizona between the cities of Flagstaff and Sedona. The canyon is often described as a smaller cousin of the Grand Canyon because of its scenic beauty. State Route 89A enters the canyon on its north end via a series of hairpin turns before traversing the bottom of the canyon for about until the highway enters the town of Sedona. Geography Oak Creek Canyon is about long, ranging in width from . The depth of the canyon ranges from . However, due to the faulting that played a major role in its formation, the west rim of the canyon is higher than the east rim. The average elevation of the west rim is while the east rim elevation is . Oak Creek Oak Creek, a tributary of the Verde River, flows along the bottom of the canyon, and is one of the few perennial streams in the high desert region of northern Arizona. Oak Creek is largely responsible for carving the modern Oak Creek Canyon, although movement along the Oak Creek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedona, Arizona
Sedona is a city that straddles the county line between Coconino and Yavapai counties in the northern Verde Valley region of the U.S. state of Arizona. As of the 2010 census, its population was 10,031. It is within the Coconino National Forest. Sedona's main attraction is its array of red sandstone formations. The formations appear to glow in brilliant orange and red when illuminated by the rising or setting sun. The red rocks form a popular backdrop for many activities, ranging from spiritual pursuits to the hundreds of hiking and mountain biking trails. Sedona is also the home to the nationally recognized McDonald's with turquoise arches, instead of the traditional Golden Arches. Sedona was named after Sedona Arabella Miller Schnebly (1877–1950), the wife of Theodore Carlton Schnebly, the city's first postmaster. She was celebrated for her hospitality and industriousness. Her mother, Amanda Miller, claimed to have made the name up because "it sounded pretty". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
