chatter mark

American  

noun

1. a mark left by a tool that has been chattering.

2. Geology. any of a series of irregular gouges made on rock surfaces by the slipping of rock fragments held in the lower portion of a glacier.

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chatter mark British  

noun

1. any of a series of grooves, pits, and scratches on the surface of a rock, usually made by the movement of a glacier

2. another name for chatter

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Etymology

Origin of chatter mark

First recorded in 1885–90