Biology Reference
In-Depth Information
mudstone, and shale's, followed by the granite gentle slopes and hills, leading further west to
the Drakensberg Escarpment. The granite plain has volcanic intrusions through mantle cracks
that formed dykes and ridges, seen for example on the dirt road from Timbavati going to
Olifant's, the Timbavati Gabbro, or for example, the Great Dyke of Zimbabwe north of
Mazunga. The northern tip is a more complex geology related to the Soutpansberg complex and
alluvial and sediment deposits from the Limpopo River. This underlying geology strongly
influences the wild vegetation growing on the overlying soil. The Kei was the southern limit
for the savanna, the latter dependent on summer rain, and also the limit to which the Nguni
Bantu tribes would migrate as pastoralists with their cattle because sorghum and millet, are
also summer rain dependent carbohydrate staples.
We are traveling from the north - southeast down the escarpment toward Mazunga, but the
reverse approach from the south to northwest up the escarpment is informative. From Durban
traveling east-west inland to Johannesburg up the Drakensberg (Dragons Back) escarpment are
several steps.
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