BEDROCK GEOLOGY OF MARGUERITE BAY AREA, PALMER PENINSULA, ANTARCTICA

摘要

Hornblende schist and a younger granite gneiss are the oldest rocks in the area. They may be Pre-Cambrian. Jurassic (?) argillites, gritstones, and conglomerates containing plant fossils are located on two small islands southwest of Adelaide Island.n Ultramafics, gabbro, diorite, granodiorite, and granite were successively injected. They are the commonest and most widespread rocks in the area. If these plutonic rocks correlate with similar rocks in southern South America, they are Cretaceous.