sentences:  Originally this was topped by a thin glacial tillite layer, known as the Pakhuis Formation (see the diagram above, left), above which was the upper layer of Table Mountain Sandstone.Both these layers, but especially the tillite layer, are softer than the lower layer of Table Mountain Sandstone.When these softer layers eroded away, like a cream-topping on a cake, they left a very hard, flat erosion-resistant quartzitic sandstone platform behind which, today, forms Table Mountain's top.