We're looking downstream from the point of land where the Sill River, which is on our right, flows into the Inn River, which is on our left. The Sill has come down from the Brenner Pass, and the Inn has come from Switzerland and western Austria. We're standing on dark sand clad with a little gravel; farther downstream on the river is a white gravel bar that is popular for sun-bathing.|
The waters of the two rivers look very different because of the different kinds of fine sediment they carry. Both rivers carry rock flour, the fine mineral material ground up by glaciers. However, the Sill drains mostly metamorphic silicate rocks, whereas the Inn drains areas of those rocks andthe limestones of the Calcareous Alps, so the two waters have different colors. Note that the water of the Sill, the smaller river, pushes aside the water of the Inn, a sign of the strength of the Sill's flow.
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