In terms of Earth Science it is the land mass below the fault.
the plates are moving in both
boundary line (a line indicating a boundary, as on a map)
the geographical boundaries of Patagonia are Wyoming and Montana.
it is china and mongoliarussia and spainjapan and franceaustralia to californianow that is some examples of a political and a natural boundary
How to Teach Your Dog Remote Boundaries
How to Decide Dogs' Boundaries
Setting Boundaries for a Good Life Balance
How to Avoid Pitfalls by Setting Limits and Boundaries