Collisional orogens commonly include mono-metamorphic and poly-metamorphic units, their different evolution can be difficult to recognize reconcile. The Theodul Glacier Unit (TGU) in the Western Alps consists of an association metasedimentary metamafic rocks embedded within Zermatt-Saas tectonic unit. In spite recent petrological studies, it remains unclear whether these underwent one or multip...

Fieldand petrographic studies of the Paleozoic metamorphic rocks of New York City suggest a new interpretation of the stratigraphy and structure of the region and has delineated a number of ductileand brittle faults. The belt of rocks originally lumped together as the Manhattan Schist is now interpreted to consist of three mappable units structurally imbricated by two major ductile faults, the ...

Late Neoproterozoic-Early Cambrian schists have been occurred in southwest of Zanjan city from the Soltanieh belt. The Soltanieh belt in northwest of Iran is uplifted basement of Precambrian-Paleozoic in main central Iran zone and includes outcrops of Precambrian, Paleozoic and Mesozoic Formations. Late Neoproterozoic-Early Cambrian schists, the oldest stratigraphy unit in the region, consist o...