Roof Pendant Rock

The presence of roof pendants indicates that the igneous body is being observed near its upper surface.

Roof pendant rock.

In structural geology a roof pendant which also known as a pendant is a mass of country rock that projects downward into and is entirely surrounded by an igneous intrusion such as a batholith or other pluton. 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 roof pendants occur as isolated pieces of the surrounding rock within the intrusive mass. The intrusions that most commonly contain roof pendants are relatively shallow stocks or batholiths.

These older rocks that are intruded by the granite are called roof pendants because they show the roof of the batholith. Roof pendant downward extension of the surrounding rock that protrudes into the upper surface of an igneous intrusive body. In roof pendant metamorphosed through the processes of contact metamorphism during which heat and fluids from the intrusion have reconstituted the enclosed rock. They are exposed by erosion of the overlying rock.

The metamorphic rock composing the mount morrison roof pendant block is the relict of a paleozoic sedimentary sequence overprinted by several deformation events which left the rocks isolated atop the sierra nevada batholith. Cretaceous granite intruding cambrian metasedimentary rock sierra nevada range. The dinkey creek roof pendant includes schist quartzite hornfelds calc silicate rocks and marble.