Sentence:  Calcareous lias, slate, and trap are still to be found there, rising from layers of <WSD>conglomerate</WSD> like teeth out of a gum. But the pickaxe has broken up and levelled those bristling, rugged peaks which were once the homes of the eagles. 
Meaning of the word marked with <WSD> tags:  A rock consisting of gravel or pebbles embedded in a matrix.