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111	111	A porous black solid, consisting of an amorphous form of carbon, obtained as a residue when wood, bone, or other organic matter is heated in the absence of air.
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113		-== [[Clay>>doc:Environmental Surveys.Rock types.Sedimenten.Clay.WebHome]] ==
	113	+== [[Clay>>doc:Rock types.Sedimenten.Clay.WebHome]] ==
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115	115	A stiff, sticky fine-grained earth that can be moulded when wet, and is dried and baked to make bricks, pottery, and ceramics.
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178	178	Detritus is particles of rock derived from pre-existing rock through processes of weathering and erosion. Detritus can also be dead organic material.
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180		-== [[Dolerite>>doc:Environmental Surveys.Rock types.Igneous rocks.Extrusive igneous rocks.Dolerite.WebHome]] ==
	180	+== [[Dolerite>>doc:Rock types.Igneous rocks.Extrusive igneous rocks.Dolerite.WebHome]] ==
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182	182	Dolerite is an igneous rock with a silica amount of 48 till 52%. The minerals present in dolerite are: olivine, plagioclase, biotite, amphiboles and pyroxenes.
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208	208	Gravel is a loose aggregation of rock fragments. Gravel is classified by particle size range and includes size classes from granule- to boulder-sized fragments. ISO 14688 grades gravels as fine, medium, and coarse with ranges 2 mm to 6.3 mm to 20 mm to 63 mm.
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210		-== [[Gypsum>>doc:Environmental Surveys.Rock types.Salts.Gypsum.WebHome]] ==
	210	+== [[Gypsum>>doc:Rock types.Salts.Gypsum.WebHome]] ==
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212	212	Gypsum is the common name for CaSO,,4,,·2 H,,2,,O and is present at places where the sea water is partly or totally dried up. These dried up areas form loose layers in between the other rocks. This type of rock is soluble in water and is formed close to halite and anhydrite. Gypsum breaks into rhombus shaped pieces.
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