Mid-Tertiary plutonism and mylonitization, South Mountains, central Arizona.

Stephen Reynolds, W. A. Rehrig

Research output: Chapter in Book/Report/Conference proceedingChapter

11 Scopus citations


Rocks in the South Mountains are representative of rocks in metamorphic core complexes elsewhere in Arizona. Fabrics in mylonitic rocks indicate extension parallel to the ENE-trending lineation and flattening perpendicular to the gently dipping foliation. The fabric is well dated as Late Oligocene to Early Miocene (25-20 m.y. ago). Mylonitic deformation was followed by more brittle deformation which produced a chloritic breccia that overlies mylonitic plutonic rocks in the NE half of the arch. The chloritic breccia is probably related to normal faulting along a low-angle dislocation surface.A.P.

Original languageEnglish (US)
Title of host publicationCordilleran metamorphic core complexes
EditorsM.D. Crittenden Jr, P.J. Coney, G.H. Davis
PublisherMemoir of the Geological Society of America, 153
Number of pages17
StatePublished - 1980
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)


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