Big Pine Roof Pendant Geology

Good examples of the paleozoic roof pendants can be seen in a string of mountains from tioga pass to big pine.

Big pine roof pendant geology.

Structures produced during this orogeny include a probable cryptic thrust fault separating rocks assigned to the morrison block from those in the big pine creek pendant which may belong to the white inyo block and the nevahbe thrust which separates lower from upper paleozoic rocks in the eastern part of the mount morrison pendant and may separate the pine creek and bishop creek pendants. The oldest rocks are of lower cambrian age and occur in the big pine roof pendant. The major roof pendants of the eastern sierra nevada including the bishop creek pine creek mount morrison deadman pass gull lake and part of the northern ritter range and log cabin mine pendants are composed of continental margin rocks rang ing in age from middle cambrian to mid dle permian. Of the kings river cuts through the boyden cave roof pendant one of the large roof pendants of the kings terrane.

The roof pendant consists of slate quartzite marble and schist. Three deformations are documented in the roof pendant. This group of pendants ap. Let s start with the easy explanations.

There are a range of structures sills dykes1 laccoliths and ring dykes that are associated with intrusion of magma at shallow depths all of these features involve magma moving along a plane of weakness a fault or bedding in sedimentary rocks and forming a relatively thin layer. The first deformation is reflected only in the metasedimentary rocks and consists of northeast to east west trending folds. Geological society of america bulletin is a leading international journal for major scholarly research in all branches of the earth sciences. First intruding magma near the surface.

These older rocks that are intruded by the granite are called roof pendants because they show the roof of the batholith. Sparse fossils mainly crinoids and ammonites of jurassic age have been found in some of these rocks. The photo below shows the cretaceous granite below light colored rock and the dark colored sedimentary now metamorphic rock above. Excellent exposures of the roof pendant can be seen along the river in.

This roof pendant is host to the pine creek mine deposits which have produced significant amounts of tungsten as well as accessory molybdenum copper silver and gold newberry 1982. These roof pendants have rocks from all of the paleozoic periods. Full text available for all issues. Similar structures occur in the boyden cave roof pendant and in the calaveras formation and represent a middle jurassic regional deformation.

The probable source of the anomalies is the pine creek roof pendant which crops out in the southern part of the study area.