Geotechnical Conditions Sample Clauses

Geotechnical Conditions. A Geotechnical Report is given in the Annexures. The geological unit through which the proposed pipeline runs is that of the Katberg Formation, belonging to the Tarkastad Subgroup, of the greater Karoo Supergroup. The Katberg Formation forms part of the Tarkastad Subgroup of the Beaufort Group belonging to the greater Karoo Basin. The Tarkastad Subgroup is characterized by a greater abundance of both sandstone and red mudstone than the Adelaide Subgroup. The boundary between these subgroups is the only line that can be traced with certainty throughout the Karoo Basin. The Katberg Formation is known to be sandstone rich and constitutes over 90% of the Formations makeup in cases where the Katberg Formation is found in coastal localities near East London. However, inland exposures have a more equal division of sandstone and mudstone. In the North, the mudstone becomes excessive and difficulty in distinguishing it from the Burgersdorp Formation may occur. The Katberg is just over 900m thick in most cases. Sandstones of the Katberg Formation are fine to medium grained with scattered pebbles up to 150mm in diameter, (common in coastal exposures). Generally, the rocks are light brown to grey or greenish grey in colour with strong horizontal laminations, parting lineations, trough cross bedding and planar cross bedding characteristics. Oval shaped calcareous concretions between 30 and 100mm in diameter are common with a preferred orientation in a parallel direction to the palaeoslope present at deposition. Post depositional dolerite intrusions are present as well. The dolerite intrusions may occur as either, horizontal ▇▇▇▇▇ and lenses or vertical ▇▇▇▇▇ which cut through the sedimentary layers. Furthermore, the vertical ▇▇▇▇▇ cut through the horizontal ▇▇▇▇▇.