Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . nsists of micrite, which indicatesa sheltered environment. Although articulated Perna perna would also suggesta sheltered environment, much fragmented shell debris is indicative of periodsof higher energy marine conditions. Parker (1968) found that calcareousmaterial constituted more than 95 per cent of the limestone. The base of the marine limestone on the northern side of Hoedjiespuntpeninsula (behind the Sea Harvest factory) is characterized by wave-generatedgranite boulders. The limestone consists partly of unconsoli
Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . nsists of micrite, which indicatesa sheltered environment. Although articulated Perna perna would also suggesta sheltered environment, much fragmented shell debris is indicative of periodsof higher energy marine conditions. Parker (1968) found that calcareousmaterial constituted more than 95 per cent of the limestone. The base of the marine limestone on the northern side of Hoedjiespuntpeninsula (behind the Sea Harvest factory) is characterized by wave-generatedgranite boulders. The limestone consists partly of unconsolidated shell deposits,and partly of coquina and microcoquina. The marine limestone is overlain byapproximately 20 m of aeolian limestone. The microcoquina is a medium-grained skeletal lime grainstone with a drusy calcite cement. Detrital shellgrains form in excess of 95 per cent of the rock, and the remainder is quartz and shell grains are generally well rounded but corroded. The shellgrains include foraminifer and echinoid spine fragments. Although the lime-. Calcrete rubble Langebaan limestone Early Pleistoceneshelly marinelimestone Miocene transgressive complex Phosphorite and granite boulders BredasdorpFormation SaldanhaFormation Late Pleistocene boulderbeach with interstitial coarseshelly quartzose sands Granite bedrock Fig. 4. Geological section at Bomgat. Hoedjiespunt. 82 ANNALS OF THE SOUTH AFRICAN MUSEUM
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