The existence of grooves is due to the diffusion of material on the surface of a crystalline grain.
The exact nature of the groove depth dynamics induced by variable speed of the boundary has not been explored.
I have often argued that conventional office architecture has become stuck in a groove.
Phonograph cylinders were made of wax, and thus only withstood a very limited number of replayings before the groove was worn.
In such a situation the resulting asymmetry in the profile of the groove walls can cause the stylus to jump out of the groove.
To entertain passers-by, a musician might as well keep the groove going while practising lyrical improvisation and melodic embellishment.
Cervical grooves deep oval pits, generally followed by shallow divergent depressions.
Sub-horizontal irregular grooves across fault surface are excavator marks, not primary features.
