Submitted by doug.cole on Fri, 10/25/2013 - 15:44
Inventory Reference
GEO042
Formal Gradings
Grading
Grade IIIc
Grading Date
GradingComment

Geosite covering a breccia pipe intruding sandstone and mudstone of Abrahamskraal Formation near top of Ouberg Pass. Such pipes are rare and it should be classified as a local heritage site. Grading by: DOUG COLE

Statement of Significance

Breccia pipe, 160 by 130 metres, which is one of the largest in the Karoo. It intrudes sandstone and mudstone of the Abrahamskraal Formation which has an age of 264 - 268 million years. Breccia pipe consists of angular clasts of Abrahamskraal Fm sandstone and mudstone in a siliceous matrix. It is possibly 183 million years old and associated with Karoo dolerite or latest Cretaceous in age associated with the 66 - 75 million year-old Sutherland Suite.

Significance criteria
Significance Categories
Research, Teaching or Benchmark Site
Sphere of Significance
Local
Level
Low
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