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That Rillenkarren is (german.) solution flutes that occur only in places where fresh unspent precipitation is active and end where the water attains too high a content of lime or where water is added. their length increases with slope, temperature, and rainfall; eventually reaching 1 m and more in the tropics, up to 50 cm, and as an exception, 100 cm in the alps. their width extends from 1 to 3 cm. they lie together in rows with no space between, with sharp intermediary ridges of no more than 1 cm in height. they increase at all freely exposed peaks and ridges where fresh rainwater alone is at work. the grooves gradually flatten out to a smooth surface. their theory of origin is unknown. [3]. synonyms: (german.) kannelierungen; solution flutes; and firstkarren.?

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