It is something that takes a long time
It is something that takes a long time
Constructive forces are generally slow.
Erosion is not an "impact" process, it is a gradual, degrading process.
An earthquake
There is not a date for it. The decline of the empire was a gradual process, not an event.
When water changes to vapor, it is either evaporation, if the process is gradual, or it is boiling, if the process is accelerated by heat.
Succession.
It is in a constant state of change, but erosion is a slow and gradual process.
It is usually slow and gradual, but such things as storms can cause sudden changes.
This was a gradual process from 1958 to 1979.See the Related Link.
A process of gradual, peaceful, progressive change or development as in social or economic structures
They began a gradual process of democratization