Show hinging rocks ringing hill ringing nocks park about two miles northeast of potts town pa pai Is one of seven places in pennsylvania whore where ringing rocks are found when struck quickly with certain implements the rocks give off musical notes the tot tones tes varying with size and quality of the rock not all the rocks in those these sections ring but only those which vibrate freely because of the manner in which they are supported varying in size from a few pounds to several tons the rocks are arc all of one kind a or trap rock all are composed of the same minerals and the lathe shaped crystals in the when studied under a microscope are seen to be lying in in rill all directions forming a network in which it is believed sound waves can call develop |