Journal
SOUTH AFRICAN JOURNAL OF GEOLOGY
Volume 108, Issue 3, Pages 345-350Publisher
GEOLOGICAL SOC SOUTH AFRICA
DOI: 10.2113/108.3.345
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This contribution documents the discovery of seismites in pyroclastic lithologies of the Kameeldooms Formation of the late Archean (2.8 to 2.65 Ga) Ventersdorp Supergroup, South Africa. A variety of well-preserved sedimentary structures document the seismites, comprising syn-sedimentary faults, convolute bedding, graben-like down-sagging structures, syn-sedimentary breccias and syneresis cracks. Earthquakes associated with syn-sedimentary faulting and intrabasinal volcanic activity that affected the unconsolidated sediments of the Kameeldooms Formation explain the origin of these structures.
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