Uniformitarian models for the early Earth take little or no account of repeated impacts of asteroid clusters and their effects on crust and mantle. However a growing body of evidence exists for multiple impacts by bodies on the scale of tens of kilometer during similar to 3.47-2.48 Ga, likely accounting at least in part for maficultramafic volcanism produced by mantle rebound and melting events, consistent with the original suggestion by Green (Earth Planet Sci Lett 15: 263-270, 1972, Precambrian plate tectonics. Elsevier, Amsterdam, pp 469-489, 1981). Further, the juxtaposition of at least four impact ejecta units with the fundamental unconformity between granite-greenstone terrains and semi-continental deposits in both the Barberton Greenstone Belt and the Pilbara Craton about similar to 3.26-3.227 Ga constitutes a primary example for the tectonic and magmatic effects of asteroid impact clusters in the Archaean, supporting Lowe and Byerly (Did the LHB end not with a bang but with a whimper? 41st Lunar Planet Science Conference 2563pdf, 2010) suggested extension of the late heavy bombardment (LHB).