Roof Pendants Are

The photo below shows the cretaceous granite below light colored rock and the dark colored sedimentary now metamorphic rock above.

Roof pendants are.

Bateman a roof pendant is a mass of metamorphic rock that is entirely surrounded by plutonic rock and presumed to be a downward projection of rocks that overlaid the plutonic rocks before erosion in this report an overview of the roof pendants within the sierra nevada range is given. They are exposed by erosion of the overlying rock. Definition of roof pendant. Roof pendants can be read more.

If this downward protruding mass of roof rock still has a connection to the main surrounding mass of country rock they are known by structural geologists as either septa or screens. The intrusions that most commonly contain roof pendants are relatively shallow stocks or batholiths. Roof pendant downward extension of the surrounding rock that protrudes into the upper surface of an igneous intrusive body. Rüf pen dənt geology downward projection or sag into an igneous intrusion of the country rock of the roof.

Want to thank tfd for its existence. Cretaceous granite intruding cambrian metasedimentary rock sierra nevada range. Defined by paul c. 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 older rocks that are intruded by the granite are called roof pendants because they show the roof of the batholith. A roof pendant is an erosional remnant that was created by the removal by erosion of the overlying country rock that formed the roof of the igneous intrusion that encloses it. In roof pendant metamorphosed through the processes of contact metamorphism during which heat and fluids from the intrusion have reconstituted the enclosed rock. Also known as pendant.

The presence of roof pendants indicates that the igneous body is being observed near its upper surface. In lay terminology sometimes rock hat is used. Answer to question 16 1 pts roof pendants are characteristic of metamorphism which occurs at metamorphic grade. A dictionary of earth sciences.

The roof pendants occur as isolated pieces of the surrounding rock within the intrusive mass. The removal of roof rocks by erosion may leave remnants of roof pendants which resemble xenoliths in the intruding rock. Mcgraw hill dictionary of scientific technical terms 6e copyright 2003 by the mcgraw hill companies inc.