placer deposit
placer deposit Deposit of materials (e.g. gold, diamonds, tin, or platinum) that has been concentrated by mechanical action. Placer minerals generally have high density and resistance, and therefore may concentrate during various types of weathering.
More From encyclopedia.com
Concentration Gradient , Concentration Gradient
A concentration gradient occurs where the concentration of something changes over a certain distance. For example, a few drops… Antagonist , antagonist •Hispanist • Zenist • pyrotechnist •Jainist • liberationist •machinist, tambourinist •hygienist • trampolinist •mandolinist, violinist •un… Lapilli , lapilli Pyroclastic fragments or tephra ranging in size from 2 to 64 mm. Lapilli may be composed of primary magmatic material (e.g. pumice), accessor… Hepatomegaly , hepatomegaly Enlargement of the liver as a result of congestion (e.g. in heart failure), inflammation or fatty infiltration (as in kwashiorkor).
hepa… Hygroscopic Nucleus , hygroscopic nucleus Microscopic particle (e.g. of sulphur dioxide, salt, dust, or smoke) in the free air, on which water vapour may condense to form… rille , rille (rima) A small valley on the Moon. Three types are recognized. (a) Straight rilles are typically 1–5 km wide and hundreds of kilometres long, u…
You Might Also Like
NEARBY TERMS
placer deposit