Mount Morrison Roof Pendant Geology

Geology of the mount morrison pendant modified from stevens and greene 1999.

Mount morrison roof pendant geology. Due to its imposing east face mount morrison is also nicknamed the eiger of the sierra the east face consists of extremely loose rock and one should exercise extreme caution when attempting the face. These rocks developed along the passive western continental margin of north america during the middle devonian. Mations in the mount morrison roof pendant and in the central sierra. Have further complicated the geology of the morrison block.

These roof pendants have rocks from all of the paleozoic periods. Type area is along john muir trail between mount morrison roof pendant and wheeler crest and pine creek septa on east and potter pass septum on west sierra nevada ca bateman 1992. Late cretaceous type section locality area and or origin of name. 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.

Good examples of the paleozoic roof pendants can be seen in a string of mountains from tioga pass to big pine. It lies midway between mono lake on the north and bishop california on the south. 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. Highly tilted and faulted metasedimentary rocks are exposed on mount morrison.

The oldest rocks are of lower cambrian age and occur in the big pine roof pendant. A classic well documented example of a roof pendant is the strata that comprise mount morrison within the sierra nevada in mono and fresno counties california. Mount morrison consists of a roof pendant that underlies an area of 62 km 2 24 sq mi. Geological society of.

Roof pendants and wall rock septa in the eastern sierra nevada of. Figure is based on the map of rinehart and ross 1964 with extensive new mapping and reassignment of many rock units. Most of the mount morrison pendant was remapped by stevens and. Siliceous quartzite and a much thinner upper part consisting of light colored calcareous.

Geologic map of the mount morrison pendant. Morrison roof pendant a few miles north of the big pine roof pendant. These rocks developed along the passive western continental margin of north america during the middle devonian.