WebThe geologic time scale, or geological time scale, (GTS) is a representation of time based on the rock record of Earth.It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (scientific branch of geology that aims to determine the age of rocks). It is used primarily by Earth …

WebA map symbol or cartographic symbol is a graphical device used to visually represent a real-world feature on a map, working in the same fashion as other forms of symbols.Map symbols may include point markers, lines, regions, continuous fields, or text; these can be designed visually in their shape, size, color, pattern, and other graphic variables to …

WebA thematic map is a type of map that portrays the geographic pattern of a particular subject matter (theme) in a geographic area. This usually involves the use of map symbols to visualize selected properties of geographic features that are not naturally visible, such as temperature, language, or population. In this, they contrast with general reference maps, …

WebHistorically, the Beaufort wind force scale (created by Beaufort) provides an empirical description of wind speed based on observed sea conditions.Originally it was a 13-level scale (0-12), but during the 1940s, the scale was expanded to 18 levels (0-17). There are general terms that differentiate winds of different average speeds such as a breeze, a …

WebA contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function (,) parallel to the (,)-plane.More generally, a contour line for a function of two variables is a curve connecting …

WebArches National Park is a national park in eastern Utah, United States.The park is adjacent to the Colorado River, 4 miles (6 km) north of Moab, Utah.More than 2,000 natural sandstone arches are located in the park, including the well-known Delicate Arch, as well as a variety of unique geological resources and formations.The park contains the highest …

WebEarth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in …

Webgeologic map A special-purpose map made to show geological features. geological time scale. Also geologic time scale. geology geosyncline A mobile down-warping of the Earth's crust, either elongate or basin-like, measured in scores of kilometres, which is subsiding as sedimentary and volcanic rocks accumulate to thicknesses of thousands of ...

WebBanff National Park is Canada's oldest national park, established in 1885 as Rocky Mountains Park.Located in Alberta's Rocky Mountains, 110–180 kilometres (68–112 mi) west of Calgary, Banff encompasses 6,641 square kilometres (2,564 sq mi) of mountainous terrain, with many glaciers and ice fields, dense coniferous forest, and alpine landscapes. …

WebContinental drift is the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed. The idea of continental drift has been subsumed into the science of plate tectonics, which studies the movement of the continents as they ride on plates of the Earth's lithosphere. ...