Abstract
The area lying between the Lower Zambezi and its northern tributary the Lower Shire forms a relatively small salient between the better-known parts of Portuguese East Africa lying to the north and to the south, and a study of its geology in relation to that of the larger territory has yielded interesting results. The area described includes the southern end of the Nyasaland Protectorate and that part of Portuguese East Africa lying between it and the Zambezi.