Pyroclastic material in the form of altered volcanic ash or tephra has been reported and
described from one or more stratigraphic units from the Proterozoic to the Tertiary. This …

Zircon trace element geochemistry has become an increasingly popular tool to track crustal
evolution through time. This has been especially important in early-Earth settings where …

This review paper reports on the discovery of komatiites and the impact this has had on the
geosciences internationally. Komatiites were first discovered by Richard and Morris Viljoen …

On the basis of phylogenetic studies and laboratory cultures, it has been proposed that the
ability of microbes to metabolize iron has emerged prior to the Archaea/Bacteria split …

Sedimentary rocks provide a valuable record of non-uniformitarian Paleoarchean tectonic
processes. The rocks of the 3.28–3.23 Ga Mapepe Formation mark the initiation of …

The crustal setting of early Archean greenstone belts and whether they formed on or
associated with blocks of older continental crust or in more oceanic settings remains a major …

Abstract The Mendon Formation is the uppermost unit of the 3.5–3.26 Ga Onverwacht Group
in the Barberton Greenstone Belt, South Africa. It consists of a cyclic stack of komatiitic …

Hadean zircons hold the promise of providing a rare window into the crustal development
and surface evolution of early Earth. To date, the only known sources of abundant Hadean …

One of the major challenges in early Earth geology is the interpretation of the nature of the
crust and tectonic processes due to the limited exposures of Archean rocks. This question is …

It is intriguing to speculate on how continental crust grew and differentiated during the
Archean and which tectonic regimes and magmatic mechanisms were responsible for such …