We're looking eastward down the Inn from the footbridge between Telfs and Pfaffenhofen, two towns on opposite sides of the Inn. On our left is one of the light gray peaks of the Calcareous Alps.|
The gray-green color of the Inn is caused by glacial silt carried by the river. Glaciers grind rock as they move along, and the resulting fine mineral material, which is called "rock flour", is carried away by streams. Those streams carry the rock flour to the Inn, where it stays in suspension in the river's rushing water.
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