Nowadays these features are grouped together and are called "chatter marks", but as we can see from the photos below, there is a lot of variety in the forms. The top photo shows a series of roughly parallel and regularly spaced linear fractures, approx perpendicular to the direction of ice movement:
The next one shows many fractures in a small area, some of them crescentic gouges and others irregular and linear. These were formed on a moulded surface across which the ice was rising so as to surmount a hill about 30m high. The theme of ice having its greatest effects on a rising land surface is a common one -- here there would have been compressive flow, as distinct from the extending flow accompanied by tension or dragging forces on the lee side of obstacles.
Below we see a very large crescentic gouge -- almost 1 m wide, with many more smaller chatter marks in the vicinity.
This rock face, again on a rising surface, has a high density of fractures of many different types.