They are exposed by erosion of the overlying rock.
Roof pendant geology.
Roof pendants usually are strongly metamorphosed through the processes of contact metamorphism during which heat and fluids from the intrusion have reconstituted the enclosed rock.
Rocks in the major roof pendants of the eastern sierra nevada have been mapped in various degrees of detail to bet ter understand their stratigraphy internal structure and geologic history and.
The presence of roof pendants indicates that the igneous body is being observed near its upper surface.
The dinkey creek roof pendant includes schist quartzite hornfelds calc silicate rocks and marble.
These rocks are thought to have been originally deposited sometime between the paleozoic visit link and the cretaceous period visit link of the mesozoic visit link in a shallow marine area.
The photo below shows the cretaceous granite below light colored rock and the dark colored sedimentary now metamorphic rock above.
In lay terminology sometimes rock hat is used.