The Ural Mountains, or simply the Urals, are a mountain range in Eurasia that runs north–south mostly through the Russian Federation, from the coast of the Arctic Ocean to the river Ural and northwestern Kazakhstan. The mountain range forms part of the conventional boundary between the continents of Europe and Asia, marking the separation between European Russia and Siberia. Vaygach Island and the islands of Novaya Zemlya form a further continuation of the chain to the north into the Arctic Ocean. The average altitudes of the Urals are around 1,000–1,300 metres (3,300–4,300 ft), the highest point being Mount Narodnaya, which reaches a height of 1,894 metres (6,214 ft).
The Altai Mountains, also spelled Altay Mountains, are a mountain range in Central and East Asia, where Russia, China, Mongolia, and Kazakhstan converge, and where the rivers Irtysh and Ob have their headwaters. The massif merges with the Sayan Mountains in the northeast, and gradually becomes lower in the southeast, where it merges into the high plateau of the Gobi Desert. It spans from about 45° to 52° N and from about 84° to 99° E.
The Appalachian Mountains, often called the Appalachians, are a mountain range in eastern to northeastern North America. The term "Appalachian" refers to several different regions associated with the mountain range, and its surrounding terrain. The general definition used is one followed by the United States Geological Survey and the Geological Survey of Canada to describe the respective countries' physiographic regions. The U.S. uses the term Appalachian Highlands and Canada uses the term Appalachian Uplands; the Appalachian Mountains are not synonymous with the Appalachian Plateau, which is one of the provinces of the Appalachian Highlands.
The Blue Ridge Mountains are a physiographic province of the larger Appalachian Highlands range. The mountain range is located in the Eastern United States and extends 550 miles southwest from southern Pennsylvania through Maryland, West Virginia, Virginia, North Carolina, South Carolina, Tennessee, and Georgia. The province consists of northern and southern physiographic regions, which divide near the Roanoke River gap. To the west of the Blue Ridge, between it and the bulk of the Appalachians, lies the Great Appalachian Valley, bordered on the west by the Ridge and Valley province of the Appalachian range.
The Zagros Mountains are a long mountain range in Iran, northern Iraq, and southeastern Turkey. The mountain range has a total length of 1,600 km. The Zagros range begins in northwestern Iran and roughly follows Iran's western border while covering much of southeastern Turkey and northeastern Iraq. From this border region, the range continues southeast to the waters of the Persian Gulf. It spans the southern parts of the Armenian highlands, and the whole length of the western and southwestern Iranian plateau, ending at the Strait of Hormuz. The highest point is Mount Dena, at 4,409 metres (14,465 ft).
The Stepladder Mountains are located in southeastern California in the United States. The range, found in San Bernardino County, is home to the 84,199-acre (approximate) Stepladder Mountains Wilderness, which protects the Desert tortoise, California's state reptile. The mountains are located east of the Old Woman Mountains and north of the Turtle Mountains, about 29 miles (47 km) southeast of the town of Essex.
Wildwood Canyon is a canyon and California state park in the eastern foothills of the San Bernardino Mountains, within San Bernardino County, southern California.
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. 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.
Clinch Mountain Wildlife Management Area is a 25,477-acre (103.10 km2) Wildlife Management Area (WMA) in Virginia. It is the second-largest WMA in the Commonwealth, covering portions of Smyth, Washington, Russell, and Tazewell counties.
Pertica is a genus of extinct vascular plants of the Early to Middle Devonian. It has been placed in the "trimerophytes", a strongly paraphyletic group of early members of the lineage leading to modern ferns and seed plants.
Psodos is a genus of moths in the family Geometridae first described by Treitschke in 1825.
Nephrotoma quadrifaria, also known as the four-spotted cranefly, is a species of true cranefly found in most of Europe and Great Britain. The subspecies N. q. farsidica is found in Iran.
The Alborz range, also spelled as Alburz, Elburz or Elborz, is a mountain range in northern Iran that stretches from the border of Azerbaijan along the western and entire southern coast of the Caspian Sea and finally runs northeast and merges into the smaller Aladagh Mountains and borders in the northeast on the parallel mountain ridge Kopet Dag in the northern parts of Khorasan. All these mountains are part of the much larger Alpide belt. The Alborz range is divided into the Western, Central, and Eastern Alborz Mountains. The Western Alborz Range runs south-southeastward almost along the western coast of the Caspian Sea. The Central Alborz runs from west to east along the entire southern coast of the Caspian Sea, while the Eastern Alborz Range runs in a northeasterly direction, toward the northern parts of the Khorasan region, southeast of the Caspian Sea. Mount Damavand, the highest mountain in Iran measuring 5,610.0 m, is located in the Central Alborz Mountains. Mount Damavand is the 12th most prominent peak in the world and the second most prominent in Asia after Mount Everest.
Paleontology in Maine refers to paleontological research occurring within or conducted by people from the U.S. state of Maine. The fossil record of Maine is very sparse. Maine came into existence during the Ordovician as other ancient land masses accreted onto North America. At the time Maine was covered by a sea inhabited by a menagerie of invertebrates which included graptolites. During the Devonian, geologic uplift raised Maine above sea level. Early land plants flourished in the terrestrial environments. There is a gap in the local rock record spanning the remainder of the Paleozoic, the Mesozoic, and the Tertiary period of the Cenozoic era. During the Ice Age, Maine was varyingly covered by glaciers or seawater. The Devonian Pertica plant, Pertica quadrifaria, is the Maine state fossil.
The Trout Valley Formation is a geologic formation in Maine. It preserves fossils dating back to the Devonian period.
Melaleuca quadrifaria, commonly known as limestone honey-myrtle, is a plant in the myrtle family, Myrtaceae, and is native to the south of Western Australia. It is distinguished by the small size and arrangement of its leaves combined with its small spikes of white or cream flowers.
Caladenia quadrifaria, commonly known as the large pink fingers orchid is a plant in the orchid family Orchidaceae and is endemic to New South Wales. It is a ground orchid with a single, sparsely hairy leaf and up to three pale to bright pink flowers.
Pteronia paniculata is a species of flowering plant in the family Asteraceae, indigenous to the Karoo regions of South Africa.
Gnophini is a tribe of moths.
