The major element compositions of the various rocks that belong to the basalt clan are
examined, and the basalt clan is defined as consisting of those volcanic rocks that contain …

The maximum potential temperature of the Archaean mantle is poorly known, and is best
constrained by the MgO contents of komatiitic liquids, which are directly related to eruptive …

Utilization of scientific terms in geology has several inherent problems, particularly when
contemplating both process and description. Ophiolite has had a particularly notorious …

The anhydrous melting behaviour of two synthetic peridotite compositions has been studied
experimentally at temperatures ranging from near the solidus to about 200° C above the …

Olivine crystals can adopt ten types of shape. Experimental crystallization of eight rock melts
shows that there is a systematic change from polyhedral or granular olivines→ hopper …

The question of whether basaltic rocks in continental flood basalt provinces are primary
magmas or whether they are descended in general from picritic parent magmas is reviewed …

The Earth has distinctive convective behaviour, described by the plate tectonics model, in
which lateral motion of the oceanic lithosphere of basaltic crust and peridotitic uppermost …

Sub-calcic garnets encapsulated by diamonds from relatively young (90 Myr) kimberlites in
southern Africa, yield ancient Sm–Nd and Rb–Sr model ages (3,200–3,300 Myr). The …

A review of continental growth models leaves open the possibilities that Earth during the
Hadean Eon (∼ 4.5–4.0 Ga) was characterized by massive early crust or essentially none at …

The MgO content of komatiite lavas is an important measure of their formation temperature
deep in the Archaean mantle, and forms the basis for models of the early Earth's thermal and …