The compaction of amalgam into the cavity is not simply a matter of filling the hole. |
Continued compaction by overburden then converts lignite into bituminous coal and finally, anthracite coal. |
The larger contact area of the baseplate transmits more vibration to the surface producing more effective compaction. |
Since riparian areas are often wetter than the surrounding fields, they are most susceptible to trampling, soil compaction, and pugging. |
In the Australian examples this is due to gilgai, in the Sudanese example to differential compaction of the soil on weathering. |
This process is used to assist the break-down of large clay clods so that pulverisation requirements are achieved before compaction. |