petrology /petˈrɒləʤi/ petrología They went on a visit to the university's petrology department.
bedrock /ˈbedrɒk/ lecho de roca, roca sólida A stable soil soaks up water, and allows acid to break up bedrock and create more soil.
rock formation /rɒk fɔːˈmeɪʃən/ formación rocosa We discovered an astonishing rock formation.
rock slide /ˈrɒk slaɪd/ desprendimiento de rocas A rock slide temporarily closed the road.
