bed silt
71Pleistocene Epoch — Earlier and longer of the two epochs that constitute the Quaternary Period. The Pleistocene began с 1.8 million years ago and ended с 10,000 years ago. It was preceded by the Pliocene Epoch of the Tertiary Period and followed by the Holocene… …
72Schluff — Schlụff 〈m.1 od. 1u〉 1. feinstes, staubförmiges Gesteinsmaterial; Sy Staubsand 2. 〈bair.〉 Muff [→ schliefen] * * * Schlụff; Syn.: Silt: staubförmig feines klastisches Gestein mit Korngröße 0,002–0,06 mm. * * * Schlụff, der; [e]s, e u. Schlüffe …
73Channel types — A wide variety of river and stream channel types exist in limnology. All these can be divided into two groups by using the water flow gradient as either low gradient channels for streams or rivers with less than two percent (2%) flow gradient, or …
74Sediment — Cobbles on a beach River Rhône flowing into Lake Geneva …
75River Mole, Surrey — The River Mole is a river in southern England, which rises in West Sussex near Gatwick Airport and flows north west through Surrey for 80 km (50 miles) to the River Thames near Hampton Court Palace. The river gives its name to the Surrey district …
76The Hagerman Horse Quarry — The Hagerman Fossil Beds National Monument is located west of Hagerman, Idaho at the geographic division of the Snake River Plain. The Hagerman Horse Quarry is an integral part of the monument and is located on the northern flank of Fossil Gulch… …
77Avulsion (river) — In sedimentary geology and fluvial geomorphology, avulsion is the rapid abandonment of a river channel and the formation of a new river channel. Avulsions occur as a result of channel slopes that are much lower than the slope that the river could …
78Aquifer — Typical aquifer cross section An aquifer is a wet underground layer of water bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well. The study of water flow… …
79Lothal — (Gujarātī: લોથલ, IPA2|ˈloːtʰəl, Eng: Mound of the Dead) was one of the most prominent cities of the ancient Indus valley civilization. Located in the modern state of Gujarāt and dating from 2400 BCE, it is one of India s most important… …
80Cave diving — is a type of technical diving in which specialized SCUBA equipment is used to enable the exploration of natural or artificial caves which are at least partially filled with water. It is an extension of the more common sport of caving, but is much …
