These groups may also relate to emplacement mechanism and age of intrusion. Granite bodies with solid-state deformation are generally elongate or irregular and apparently older. Some of the porphyritic TMG and most of the related granites occur in irregularly shaped intrusions. Deformation varies from mylonitic to minor, localized to penetrative, and can be transitional from magmatic to solid-state .
Evidence exists for syn-kinematic growth of contact metamorphic minerals.
Examples include the Wolf Mtn. , Legion Ck. and Sixmile plutons, and the Midway Sill . The second group of granites occurs in circular to oval plutons which mostly consist of porphyritic TMG . These granites are commonly concentrically zoned and typically have margin-parallel magmatic to submagmatic foliations. When foliations are not margin parallel they trend SE, parallel to the tectonic fabrics seen in the irregularly shaped intrusions. Deformation of the wallrocks, suggesting a forceful emplacement mechanism, includes large folds with contact-parallel fold axes and vertical shear along the contact.