Show foric katr definition 01 of goal coal land n is so often of ten the tile unpleasant duty states geological sur f the united to reclassify us as non refuse ito T to irl hi I 1 and because t the tie evidence and I 1 to davits slotted for the inadequate that a word atlo tion a are f atza on what is considered equa flu ato may make clearer the tho thoi of the survey in tho the arl fitter 0 itis is a widespread ide spread popular impresa that if coal is found outcropping I 1 the land is coal land and eo t bo be found ou out i tt at if no coal is 0 epping t the he lanil land is non coal land 11 1 4 this ere tru true e probably moro than vigil otic half the coal produced in the chry try in some states more than 4 per cent would be coming from nines mines not on coal land As an al 1 iL straton oil mines in a he amna in 1908 produced 11 4 tons of coal of these mines 5 yere working the coal aiom the tile r ecta epand and prodoc produced ed tons ble clile C hafle over 3 per cent of the the rest was mined from land 7 ae e surface of which showed n no 0 c coal oal 11 1 Illi illinois aois tile th percentage is still less 00 ind and in both states the average arv pro of the romes mines on th the uy tk get oct rop ro is knull compain ed with the IRS jerage ri rage of all the mines 1111 nes the per C of coal oi biked ked from the ou out u gr ater aberm in pennsylvania west vrin vetna a an I 1 the sout sou thein heln 3 bacs than in the two just ced r t much if ana an greater in the tile field the western interior J id ld or bome u others s of tile large fields ot oath t country countr it is true that in n m lyof ny of the fields hen first exploit 3 edans aalfs feie eie mostly arivel anven in on the ie outcrop but for two reasa reasons s that ua 0 n t on I 1 a gi batly changed First C e dose to the OP has IM been mined mired out and second after a let 01 jae me it h is ts been found to bp cheaper to boin m ne the coal fi aiom om shafts sunk to t e ebed bed from a point some distance lam om tie tae outcrop than to haul thecial ile the eral cral witch and waste up the s pe of the d as it pitches into t e gerund if therefore thee fore an producing coal flipse dimind there will found a i belt of outcrop out crop in which I 1 c al lf aring rocks rise to the 3 f C of the ground ard arid outside 0 ill h t e et t in on are area billich may athu aunt to thou hu ands of 0 11 e miles where tho the coals are all below the surface alid the surface rocks maa ma even bo be of entirely different ago age and perhaps not coal bearing hearing at all in indi ana shafts have been sunk to coal cold beds at a depth of foot feet without any preliminary drilling where liere tho tile j coal bed did not outcrop nearer than 15 miles and many of tho the mines of illinois are 25 to 50 miles from the nearest outcrop of the coul they aio working in clab sif ing land as to its coal character 0 bar acter a few general principles 7 sire involved 1 if the land is known to be underlain only by gi groups coups of rocks known nowhere to contain coal the land is ahsu assumed med not to be underlain und unde eilam flain by cal and to be lind land 2 if land is known to boun be underlain un by one or more groups of rocks known n to contain workable beds of coal and a study of the dips shows that all disoso oso groups are not too deep for the coals they contain to be worked the land may be presumed to be coal land in III neaily neatly all cases re public lands have bave been withdrawn pending examination ox and classification it is known or oi believed beli oved tant the land is underlain by groups of rocks known elsewhere tb contain afi tl t a n woi babl e beds of coal in probably a majority of waists it is also known or gatei examination demonstrates that coal 1 does not outcrop on hobt of the lind withdrawn but underlies it perhaps at a considerable depth the evidence obtained ba b the survey consist of observed outcrops and mca suied sections propel pr opeil b located and described on the spot and anal ases made in the government libora labora tobies from coal samples collected in u definite dp finite pies cubed wiy sup supplemented when necessary 3 by such second hand d ita tta as appear to be accurate and id ia liable and to be in with the personal observation of the field men |