In the latter gorge, as already mentioned, igneous and syenitic masses have been acted on by some great fiery convulsion of nature; the strata are thrown into a huddled heap of confusion.

The coal has of course disappeared in Kebrabasa, but is found again in Chicova.

Tette grey sandstone is common about Sinjere, and wherever it is seen with fossil wood upon it, coal lies beneath; and here, as at Chicova, some seams crop out on the banks of the Zambesi.
Looking southwards, the country is open plain and woodland, with detached hills and mountains in the distance; but the latter are too far off, the natives say, for them to know their names.

The principal hills on our right, as we look up stream, are from six to twelve miles away, and occasionally they send down spurs to the river, with brooks flowing through their narrow valleys.

The banks of the Zambesi show two well- defined terraces; the first, or lowest, being usually narrow, and of great fertility, while the upper one is a dry grassy plain, a thorny jungle, or a mopane (_Bauhinia_) forest.