A chatter mark is one or, more commonly, a series of wedge shaped marks left by chipping of a bedrock surface by rock fragments carried in the base of a glacier (glacial plucking). Marks tend to be crescent-shaped and oriented at right angles to the direction of ice movement. There are three different types of chatter marks. The crescentic gouge i...
• A short crack on a rock surface planed smooth by a glacier. • One of the fine undulations or ripples which are formed on the surface of work by a cutting tool which chatters.
small, curved fracture found on glaciated rock surfaces. Chatter marks are commonly 1–5 centimetres (12–2 inches) but may be submicroscopic or as ... [1 related articles]
Chat'ter mark` (a) (Machinery) One of the fine undulations or ripples which are formed on the surface of work by a cutting tool which chatters. (b) (Geol.) A short crack on a rock surface planed smooth by a glacier. 
[n] - marks on a glaciated rock caused by the movement of a glacier 2. [n] - a mark made by a chattering tool on the surface of a workpiece
(Defect)- Parallel indentaions or marks appearing at right angles to edge of strip forming a pattern at close and regular intervals, caused by roll vibrations.
noun a mark made by a chattering tool on the surface of a workpiece
a mark left by a tool that has been chattering. · 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.