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Showing 1 to 2 of 2 for “"Proterozoic History"”.
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Proterozoic history of the Idaho Springs-Ralston shear zone: evidence for a widespread ca. 1.4 Ga orogenic event in central Colorado, The
… shear zone (IRSZ) is one of several Proterozoic NE-trending zones within the central-eastern Colorado Front Range. The zone is composed of multiple mylonitic strands of a few meters to several kilometers in width and is mapped from ~16 km NNW of Denver, CO to ~26 km to the SW (near …
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Proterozoic thermal and deformational history and geochemical evolution of the 1.4 Ga Priest pluton and its aureole
Paleoproterozoic (1.7-1.6 Ga) supracrustal rocks in the aureole of the 1.43 +/- 0.01 ga Priest pluton provide evidence for a polyphase Proterozoic metamorphic history in central New Mexico. This history involved pre-, syn-, and post-emplacement metamorphic mineral growth. The Priest pluton contact …