Show all coal types classes found in west colorado by THOMAS ALLEN chief inspector colorado coal mine inspection department the coal deposits of western colorado include practically alt all known kinds and classes of coal which can the type of solid fuel for all purposes of industry manufacturing and domestic demands AH coals including those of western colorado are classified on comparisons of their heating value chemical compositions and physical appearance and are named af accordingly cordingly the standard method of this arrangement is as follows lignite brown broun coal average heating units per pound sub bituminous black lignite average heating units per pound bituminous average heating beating units per pound anthracite average heating beating units per pound there are faither breakdowns in these classifications but they are not of enough importance to be e considered ons dered in detail here western colorado has no lignite deposits but has vast reserves 0 of f r bituminous sub ab and bituminous anthracite is also found in western colorado but the reserves of this kind of fuel are much less than those of the other coals the bituminous sub coals are 9 good 0 d free burning fuels but generally era lly have been on only y use used d for local consumption because they break up on exposure to the weather and for this reason were not suitable for shipment to markets at some distance from the mines but there is a completely new arrangement in the use 0 of f these coals in the near future they can be used in electric generating plants where the coal is ground into dust for more efficient burning in the combustion chambers of big steam boilers of such plants add and more important still is the fact that these coals respond very readily to hydrogenation ge nation treatment and low temperature pera ture distillation from which operations chemicals which are very much in demand can be produced but by far the greatest value in coal minerals in western colorado is represented in the huge bituminous coal reserves of the region because included in the bituminous coals are those suitable for domestic steam manu fact ing and coking purposes in addition they too can be used for the manufacture of chemicals anthracite deposits arc are a result of the action of subterranean heat and pressure on bituminous ca coal 1 without this action there would be no anthracite in simple words ordythe the original coal lias been baked and squeezed until all the substances in the coal which will v vaporize have been driven off this includes the moisture which is a part of all coals this action has taken place in western colorado in and near places where coal existed and subsequent volcanic activity and mass movement of the coal measure rocks has taken place therefore anthracite Is only found in and near some of our mountain ranges anthracite Is in little demand but there appears to be a market developing in some metallurgical and similar processes needing a a strong trong compact fuel which gives give off little smoke and gases from combustion |