What is an interbasaltic horizon? Geologist Tony Lee investigates this fascinating geological feature.

Transcript -- Giant's Causeway

Geology is the scientific study of the Earth, its origin, structure, processes and composition. This album features The Open University's Glynda Easterbrook and fellow geologist Tony Lee as they visit Northern Ireland to look at some amazing rock forms and some fascinating successions of different depositional environments. This material forms part of The Open University course S260 Geology.