| Partial melting models, isotopic studies and the petrology of entrained ultramafic xenoliths suggest that many basanitic magmas are sourced in the asthenosphere. |
| The basalt, inferred to be of Miocene age, appears to be an alkali basalt that contains xenoliths of ultramafic rocks up to a few centimeters in size. |
| To date, the only described mantle xenoliths from NW Namibia occur in an alnoite diatreme emplaced in the Mesozoic Okenyenya alkaline complex. |
| However, rare xenoliths of sedimentary rocks occur in the granite. |
| The granite contains abundant xenoliths of the country rock. |
| In addition to scoria and ash, other volcanic ejecta include blocks, bombs, and xenoliths. |
