ABSTRACT
Rocks of the lowest series – A calcareous sedimentary deposit, with recent shells, altered by the contact of superincumbent lava, its horizontality and extent – Subsequent volcanic eruptions, associated with calcareous matter in an earthy and fibrous form, and often enclosed within the separate shells of the scoriae – Ancient and obliterated orifices of eruption of small size – Difficulty of tracing over a bare plain recent streams of lava – Inland hills of more ancient volcanic rock – Decomposed olivine in large masses – Feldspathic rocks beneath the upper crystalline basaltic strata – Uniform structure and form of the more ancient volcanic hills – Form of the valleys near the coast – Conglomerate now forming on the sea beach.
