▁other ▁periods ▁based ▁on ▁its ▁distinct ive ▁style , ▁subjects , ▁method ▁of ▁production ▁and ▁weather ing ▁characteristics , ▁and ▁the ▁repeated ▁association ▁of ▁these ▁features ▁with ▁arch ae ological ▁sites ▁of ▁the ▁ne ol ith ic ▁period . ▁ ▁The ▁pet rog lyph s ▁Many ▁of ▁the ▁mot ifs ▁on ▁the ▁rocks ▁are ▁of ▁cattle , ▁in ▁particular ▁the ▁long - horn ed ▁hum ped - back ▁type ▁found ▁in ▁southern ▁India ▁( B os ▁indic us ). ▁Some ▁are ▁of ▁human - like ▁figures , ▁either ▁on ▁their ▁own ▁or ▁accompanied ▁by ▁cattle . ▁Some ▁of ▁these ▁are ▁in ▁ch ains ▁or ▁with ▁b ows ▁and ▁ar rows . ▁According ▁to ▁Dr ▁Bo iv in , ▁the ▁mascul ine ▁nature ▁of ▁the ▁eng rav ings ▁suggest ▁that ▁the ▁people ▁who ▁made ▁the ▁images ▁were ▁men ▁and ▁were ▁probably ▁involved ▁in ▁her ding ▁cattle . ▁The ▁mot ifs ▁were ▁made ▁by ▁bru ising ▁the ▁rocks , ▁pres umably ▁with ▁a ▁stone ▁implement . ▁Some ▁of ▁the ▁images ▁are ▁in ▁locations ▁so ▁difficult ▁to ▁reach ▁that ▁it ▁would ▁have ▁required ▁the ▁artists ▁to ▁susp ended ▁themselves ▁from ▁an ▁over hang ▁to ▁make ▁the ▁images . ▁ ▁Musical ▁rocks ▁The ▁loc als ▁refer ▁to ▁some ▁of ▁the ▁rock ▁form ations ▁as ▁the ▁' mus ical ' ▁rocks . ▁They ▁consist ▁of ▁peculiar ▁de press ions ▁in ▁the ▁rocks , ▁which ▁when ▁struck ▁with ▁b ould ers ▁produce ▁loud , ▁g ong - like ▁musical ▁t ones . ▁In ▁some ▁cult ures , ▁per cussion