The process of collecting dense placer material by a series of riffles placed in a stream of water
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Tag: <span>G</span>
Rocks and minerals transported through the meltwater of glaciers
A large screen, sieve or mesh structure used for the process of grading rocks and gravels by size
General terms applied to altered, basaltic igneous rock coloured Dark green by chlorite, actinolite or epidote
An instrument used to measure the density of underlying rock based on the level of gravitational variance
A dark grey, coarse grained sedimentary sandstone rock frequently occurring as thick strata interbedded with marine shale, thought to derive from submarine compaction of lava flows
A term used to describe a placer mine where free gold is collected from loose gravel, sand and soil.
A hexagonal and trigonal form of native carbon
Term used to describe a rock whose texture is influenced by the abundance of mineral grains between 2mm to 1cm.
A common coarse-grained igneous rock mainly comprised of quartz, feldspar and mica