Sentence:  Calcareous lies, slate, and trap are still to be found there, rising from layers of conglomerate, like teeth from a gum; but the pickaxe has broken up and leveled those bristling, rugged peaks which were once the fearful perches of the <WSD>ossifrage</WSD>. 
Meaning of the word marked with <WSD> tags:  "Gypaetus barbatus", the diet of which is almost exclusively bone marrow.