Every transition can be found between perfectly normal ophitic dolerites and typical hornblende-schists, and occasionally the same dike or sill will provide specimens of all the connecting stages.
28 The granites and dolerites from Magan were too fine and too expensive to build with.
The Karroo formation and associate dolerites (Loalemandelstein) occur in the same region.
It occurs in a series of amygdaloidal dolerites or diabases, and in the associated sandstones and conglomerates.
The lower (Ashangi group) consists of basalts and dolerites often amygdaloidal.