▁Broad stone ▁quar ry ▁from ▁B ark ip ▁J unction ▁on ▁the ▁A yr shire ▁and ▁Lan ark shire ▁Railway ▁branch line ▁to ▁Kil bir nie . ▁At ▁first ▁sid ings ▁and ▁a ▁transfer ▁system ▁existed ▁with ▁a ▁we igh ing ▁machine ▁at ▁what ▁was ▁to ▁become ▁Bra cken h ills ▁railway ▁station , ▁later ▁a ▁direct ▁j unction ▁was ▁laid . ▁The ▁line ▁did ▁not ▁surv ive ▁into ▁the ▁ 2 0 th ▁century . ▁The ▁road ▁nearby ▁is ▁still ▁known ▁as ▁' Re ek ▁Street '. ▁ ▁Ge ology ▁Several ▁large ▁fallen ▁trees ▁at ▁Sp ier ' s ▁Old ▁School ▁Gr ounds ▁have ▁their ▁roots ▁embedded ▁in ▁rock ▁which ▁is ▁derived ▁from ▁an ▁old ▁la va ▁flow ▁known ▁as ▁a ▁' di ke ,' ▁one ▁of ▁a ▁' sw arm ' ▁that ▁exist ▁locally . ▁The ▁solid ▁ge ology ▁of ▁the ▁Be ith ▁area ▁is ▁domin ated ▁by ▁rocks ▁such ▁as ▁lim estone , ▁coal , ▁and ▁also ▁wh inst one , ▁an ▁ igne ous ▁bas alt . ▁The ▁wh inst one ▁is ▁therefore ▁derived ▁from ▁vol can ic ▁activity ▁and ▁often ▁shows ▁itself ▁as ▁' d ikes ' ▁which ▁are ▁usually ▁linear ▁se ams ▁of ▁hard ened ▁la va ▁which ▁was ▁originally ▁pushed ▁up ▁through ▁the ▁over lying ▁lim estone ▁or ▁coal . ▁Co al ▁min ers ▁were ▁greatly ▁incon ven ien ced ▁by ▁these ▁hard ▁d ikes . ▁ ▁The ▁bas alt ▁at ▁Sp ier ' s ▁has ▁many ▁distinct ive ▁holes ▁or ▁b ub bles , ▁known