unconsolidated
41Aquifer — 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… …
42Beachrock — Beachrocks are created by the rapid cementation of beach sediments in the intertidal zone which leads to the formation of characteristic synsedimentary lithified structures. Overview Beachrock units form under a thin cover of sediment and… …
43geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …
44silt — siltation, n. silty, adj. /silt/, n. 1. earthy matter, fine sand, or the like carried by moving or running water and deposited as a sediment. v.i. 2. to become filled or choked up with silt. v.t. 3. to fill or choke up with silt. [1400 50; late… …
45Earth 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… …
46New York City mayoral elections — Elections in New York Federal offices Presidential elections 1996 · 2000 · 2004  …
47Mining — This article is about the extraction of geological materials from the Earth. For the municipality in Austria, see Mining, Austria. For the siege tactic, see Mining (military). For name of the Chinese emperor, see Daoguang Emperor. Simplified… …
48Sedimentary rock — Middle Triassic marginal marine sequence of siltstones (below) and limestones (above), Virgin Formation, southwestern Utah, USA Sedimentary rock are types of rock that are formed by the deposition of material at the Earth s surface and within… …
49Philadelphia County, Pennsylvania — Location in the state of Pennsylvania …
50Regolith — (Greek: blanket rock ) is a layer of loose, heterogeneous material covering solid rock. It includes dust, soil, broken rock, and other related materials and is present on Earth, the Moon, some asteroids, and other planets. The term was first… …
