respectively. The coeval sills found mostly in Zimbabwe and the Kaapvaal cratons have a close relationship to each other. These sills are however the feeders to the south pans berg group of lavas at presumable facts (Olsson and S””Oderlund et al. 490–500). The dated feeder dyke systems are the source of the new information thus being the source code to the cause of petronic setting re-evaluation

where the range is from the state back-arc to either radiating swarms or vice versa originating from igneous centers.