THE dominant xenolith types in the kimberlites of the Sefadu area of eastern Sierra Leone are granite, amphibolite and amphibole-schist derived from the wall rocks. Eclogite and dunite xenoliths ...

The new occurrences are in an amphibole schist and a quartz schist respectively.—Products of the explosion of acetylene, and of mixtures of acetylene and nitrogen, by W. G. Mixter.

Such high recovery in shallow mantle sequences is nearly unprecedented in the history of ocean drilling. The cored sections were highly heterogeneous, ranging from moderately to highly altered and ...