| There are significant differences in the clay mineral compositions of the Barton Creek dolomite, spheroid and diamictite units. |
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| The diamictite sediments that were laid down by these glaciers, or in glacial lakes, are known as the Pakhuis and Cederberg Formations. |
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| These diamictite rocks are composed of finely ground mud, containing a jumble of faceted pebbles. |
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| The diamictite deposits left by these glaciers form the first layer of the Karoo Supergroup, called the Dwyka Group. |
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