Roof Pendant Geology Definition

Roof pendants can be.

Roof pendant geology definition.

The roof pendants are the remains of the paleozoic and early mesozoic rocks that once covered the magma chambers of the sierra nevada batholith. The roof pendants occur as isolated pieces of the surrounding rock within the intrusive mass. How do you use roof pendant in a sentence. These older rocks that are intruded by the granite are called roof pendants because they show the roof of the batholith.

In geology the term xenolith is. The intrusions that most commonly contain roof pendants are relatively shallow stocks or batholiths. What are synonyms for roof pendant. They are exposed by erosion of the overlying rock.

A broad definition could include rock fragments which have become encased in sedimentary 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. What is the definition of roof pendant. Roof pendant downward extension of the surrounding rock that protrudes into the upper surface of an igneous intrusive body.

Cretaceous granite intruding cambrian metasedimentary rock sierra nevada range. The large scale inclusion of foreign rock strata at the margins of an igneous intrusion is called a roof pendant examples. In roof pendant metamorphosed through the processes of contact metamorphism during which heat and fluids from the intrusion have reconstituted the enclosed rock. The current geological model for the santana project area has identified that gold mineralization is related to a series of hydrothermal breccias approximately 300 500m in diameter or greater hosted by the copula of batholithic intrusions porphyritic stocks and by roof pendants of their volcanic host rocks.

Xenoliths in granodiorite. The roof pendants sit in the batholith like plums in a pudding and add a little mystery and pizzazz to the geology of the sierra. 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. The presence of roof pendants indicates that the igneous body is being observed near its upper surface.