Weathering, trampling, chewing,
chemical and physical erosion during digestion and subsurface disintegration
can all cause rounding, but abrasion is usually evidence for fluvial transport
and reworking. Abrasion of skeletons occurs when they are exposed to moving
particles or when the skeletons themselves are moved relative to other
particles. The abrasion of particles is directly related to the energy
of the environment. Significant abrasion is most often found on skeletal
material collected from beaches, or areas of strong currents or wave action.
Constant high energy wave action
will quickly and easily wear away
bone (even rock) material.