By modification I'm assuming both rock and granite landforms.
*Cutting granite in slabs for counter tops, design etc
*Crushing granite for construction quarry etc
*Construction and Earth moving machinery like bulldozers can break granite apart
* Granite sculpting e.g presidents faces on Mt Rushmore, USA
* Global warming leading to much insolation and exfoliation.
* Granite bursts due to pressure released when overlying strata is removed in mining operations
* Undercutting, excavation etc revealing granite on the surface and exposing it to weathering agents