alluvial slope spring
21Durance — For the commune in the Lot et Garonne departement, see Durance, Lot et Garonne. Durance Mirabeau Bridge over the Durance. Origin Cottian Alps Mou …
22mineral deposit — Introduction aggregate of a mineral in an unusually high concentration. About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… …
23Aliso Creek (Orange County) — Not to be confused with Aliso Creek (Los Angeles County). Coordinates: 33°30′38″N 117°45′9″W / 33.51056°N 117.7525°W / 33.51056; …
24arctic — arctically, adv. /ahrk tik/ or, esp. for 7, /ahr tik/, adj. 1. (often cap.) of, pertaining to, or located at or near the North Pole: the arctic region. 2. coming from the North Pole or the arctic region: an arctic wind. 3. characteristic of the… …
25Geology of Somerset — Somerset is a rural county in the southwest of England, covering convert|4171|km2|sqmi|0. It is bounded on the north west by the Bristol Channel, on the north by Bristol and Gloucestershire, on the north east by Wiltshire, on the south east by… …
26River engineering — The Los Angeles River is extensively channelized with concrete embankments. River engineering is the process of planned human intervention in the course, characteristics or flow of a river with the intention of producing some defined benefit.… …
27Abyssal fan — Abyssal Fans, also known as deep sea fans, underwater deltas, and submarine fans, are underwater structures that look like deltas formed at the end of many large rivers, such as the Nile or Mississippi Rivers. Abyssal fans are also thought of as… …
28earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …
29San Mateo Creek (Southern California) — For the creek in San Mateo County, California, see San Mateo Creek (San Francisco Bay Area). Coordinates: 33°23′05″N 117°35′34″W / 33.38472°N 117.59278°W …
30Manhattan, Nevada — Manhattan is a small town in Nye County, Nevada located on State Route 377 about 50 miles north of Tonopah, the county seat, off State Route 376. It originally was founded in 1867 as part of the silver mining boom and then, in 1905, as part of… …
