Alluvial fan — An alluvial fan is a fan shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain. A convergence of neighboring alluvial fans into a single apron of deposits against a… … Wikipedia
washover fan — A fan like deposit of sand washed over a barrier island or spit during a storm and deposited on the landward side. Washover fans can be small to medium sized and completely subaerial, or they can be quite large and include subaqueous margins… … Glossary of landform and geologic terms
washover-fan flat — A gently sloping, fan like, subaqueous landform created by overwash from storm surges that transports sediment from the seaward side to the landward side of a barrier island (GG). Sediment is carried through temporary overwash channels that… … Glossary of landform and geologic terms
washover-fan slope — A subaqueous extension of a washover fan flat that slopes toward deeper water of a lagoon or estuary and away from the washover fan flat. Compare: washover fan flat. SSS … Glossary of landform and geologic terms
Origin of the Oak Ridges Moraine — For general context, see Oak Ridges Moraine. The Oak Ridges Moraine is a geological landform that runs east west across south central Ontario, Canada. It developed about 12,000 years ago, during the Wisconsin glaciation in North America. A… … Wikipedia
river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… … Universalium
Vargas tragedy — A part of Vargas state after the 1999 mudslides Date December 14, 1999 (1999 12 14) December 16, 1999 (1999 12 16) Location … Wikipedia
continental landform — ▪ geology Introduction any conspicuous topographic feature on the largest land areas of the Earth. Familiar examples are mountains (including volcanic (volcanism) cones), plateaus, and valleys. (The term landform also can be applied to… … Universalium
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… … Universalium
