For chatter marks made in machining, see Chatter (machining).
Chatter marks on sandstone south of Lac Beauchamp, in Gatineau, Quebec, Canada
In glacial geology, a chatter mark is a wedge-shaped mark (usually of a series of such 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.[1][2]
There are three different types of chatter marks. The crescentic gouge is an upstream concave that is made by the removal of a piece of rock. The crescentic fracture is a downstream concave that is also made by the removal of rock. The lunate fracture is also a downstream concave made without the removal of rock.[3]
^Marshak, Stephen, 2009, Essentials of Geology, W. W. Norton & Company, 3rd ed. ISBN 978-0393196566
^
Dictionary of Geological Terms, Third Edition (1984). American Geological Institute Publications. Robert L. Bates and Julia A. Jackson, Editors
In glacial geology, a chattermark is a wedge-shaped mark (usually of a series of such marks) left by chipping of a bedrock surface by rock fragments carried...
Look up chatter in Wiktionary, the free dictionary. Chatter may refer to: Chatter (machining) or machining vibrations the undesirable phenomenon of oscillations...
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as grinding. A chattermark is an irregular surface flaw left by a wheel that is out of true (off-center) in grinding, or regular marks left when turning...
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crescentic "chattermarks" made on smoothed bedrock by glacial ice dragging along boulders at its base, the numerous crescentic impact marks sometimes seen...
such as moraines, eskers and erosional features such as striations and chattermarks. These lakes are clearly visible in aerial photos of landforms in regions...
teeth to retract from their cutting position. This also gives rise to chattermarks and defeats the purpose of using the reamer to size a hole. A straight...
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licensed the engine and successfully solved various problems relating to chattermarks. The engine was used successfully by Mazda in several generations of...
sanding, often caused by using an inferior sanding machine, can lead to 'chattermarks'. These occur when the sander has not been correctly positioned over...
the Precambrian basement has glacial striations, rôche moutonnées and chattermarks formed likely during the Karoo Ice Age. The Paleozoic sedimentary cover...
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is slow and difficult with soft and poorly fixed tissues, and that chattermarks or vibratome lines are often apparent in the sections.[citation needed]...
the direction of the glacier's movement. Similar to striations are chattermarks, lines of crescent-shape depressions in the rock underlying a glacier...
step when hollowing out a bowl or vessel chatter tool – a flexible scraper used to add decorative chattermarks to turned items wire – a simple wire, sometimes...
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rectangle interrupted by the wild leaps of the carriage-return, the frantic chatter of a motor run, even the ludicrous frenzy of hosts of bogus scores. A team...
during formation process visible banding from formation of the boule chattermarks which on the surface which appear crack like which are caused from damage...
features during the Pleistocene. Glacial polish, glacial striations, and chattermarks are evident in granitic surfaces. Other glacier-shaped features include...
and 1960s. For a while, engineers were faced with what they called "chattermarks" and "devil's scratch" in the inner epitrochoid surface, resulting in...
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