The southern face of Sea Range is very abrupt and surmounted by a cliff of red sandstone 50 to 100 feet high, the whole height of the hills about 500 feet, the range being the edge of an elevated tableland, the upper strata being hard sandstone in horizontal beds which rest on soft shales which appear to be somewhat inclined; but its surface was so covered by fragments of the upper rocks that no satisfactory data was obtained.