You're probably thinking of weathering and erosion (or just weathering) or excavation :)
Rifting
Calving
Centers of continental plates can extend to depths of more than 200 kilometers, with greater depths under young mountain systems. At subduction zones the oceanic plate can be pushed as deep as 600 kilometers into the mantle before it breaks up and melts under the continental plate.
A convergent plate boundary, otherwise known as a destructive plate margin, forms volcanoes. This happens when -The subducting plate brings down silicates such as sand down with it. -Eventually, the plate melts but mixes with the silicates. This forms a more viscose but lighter magma -This rises because it is lighter until it reaches the moho, (the boundary between the lithosphere and the asthenosphere, (the plate and the stuff it floats own). This is the other plate. -It then breaks though, slowly rising to the surface. -It then erupts out of a volcano a few miles in to land. (This is the continental-oceanic process. The oceanic-oceanic, is slightly different).
The process that breaks down granite into sediments is weathering.
BACTERIA
weathering breaks rocks on earths surface
Calving
The process that breaks down rock above the earths surface are numerous and could be generally reffered to as Exogenous Processes, they include, Weathering, Denudation and Mass-wasting.
Centers of continental plates can extend to depths of more than 200 kilometers, with greater depths under young mountain systems. At subduction zones the oceanic plate can be pushed as deep as 600 kilometers into the mantle before it breaks up and melts under the continental plate.
A convergent plate boundary, otherwise known as a destructive plate margin, forms volcanoes. This happens when -The subducting plate brings down silicates such as sand down with it. -Eventually, the plate melts but mixes with the silicates. This forms a more viscose but lighter magma -This rises because it is lighter until it reaches the moho, (the boundary between the lithosphere and the asthenosphere, (the plate and the stuff it floats own). This is the other plate. -It then breaks though, slowly rising to the surface. -It then erupts out of a volcano a few miles in to land. (This is the continental-oceanic process. The oceanic-oceanic, is slightly different).
The process that breaks down granite into sediments is weathering.
Once magma breaks through the earths crust it is called"lava"
Weathering and erosion is wind or water that breaks away rock or soil. The rocks they carry can erode away other rocks.
Denudational processes, which includes, weathering, erosion, deformation, and exfoliation. Mass movement also plays a great role in changing the earths surface.
earthquakes
Weathering is when a rock breaks down through contact with the Earths atmosphere
BACTERIA