Asbestos Bearing Rocks
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Asbestos is the general term for a number of minerals belonging to the serpentine and amphibole groups that have similar properties. Asbestiform minerals are composed of very thin, long fibrous crystals, and it is this fibrous nature that makes them dangerous. Asbestos is frequently associated with serpentinite and partially serpentinized ultramafic/ultrabasic rocks (however, not all ultrabasic rocks are serpentinite bearing). WGS has compiled data pertaining to historic prospects and (or) mines within Washington known to have produced asbestos as a primary commodity or as a byproduct of mining. </SPAN></P><P><SPAN>This layer differs from Asbestos Locations in that it displays rock units that potentially contain asbestos, compiled from 1:100,000-scale geologic maps, rather than specific locations known to have produced asbestos as a primary commodity or mined a mineral type that can potentially produce asbestos.</SPAN></P></DIV></DIV></DIV>
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