| Hence, moissanites in kimberlites represent xenocrysts, the kimberlites sampling cold and reduced parts of lithospheric mantle keels. |
| Xenoliths and xenocrysts provide important information about the composition of the otherwise inaccessible mantle. |
| Again, the lack of zircon xenocrysts in this sample does not allow discrimination between these alternatives. |
| On the western side of the mesa, black hornblende xenocrysts several centimeters in size are also found in a scoriaceous, agglomeratic portion of the lava flow. |
| Kimberlites contain, in addition to diamond xenocrysts, fragments of lherzolites of varying composition. |
| We interpret these grains as xenocrysts from an older source terrain from which the granitic protolith of sample MS 3 may have been derived by anatectic melting. |
