Late stage granite plutons and small intrusive bodies intrude metamorphic rocks of all three lithotectonic domains, indicating accretion by ~1.1 Ga (Mosher, 1998). The oldest syn-tectonic granites range from 1126 to 1116 Ma in age, whereas post-tectonic granites are 1116 to 1070 Ma in age.  A low-pressure, mid-amphibolite facies (525-625^o C at P ~0.3 GPa) metamorphism is associated with the granite plutons (Carlson, 1998). 

The oldest 1119-1118 Ma plutons are deformed by late stage deformation.  For example, the Wolf Mountain Intrusion in the central uplift is folded by an F₅ sycline (left). The Grape Creek pluton in the southeastern uplift is cut by a ductile shear zone forming protomylonitic to ultramylonitic fabrics  (right) (Reed, 1999). 

In the southeastern uplift a melarhyolite dike (rhyolite composition but dark in color) dated at 1098 +/- Ma cuts all deformation fabrics (S1-S5) and is undeformed.  Note flow foliation in closeup of dike margin and the cross cutting of the pronounced foliation (Nelis et al., 1989).

Late post-tectonic granite plutons, such as Enchanted Rock pictured above, form over 40% of the Llano Uplift exposures. These granites are undeformed internally (right) although the adjacent country rock may show evidence of deformation during intrusion.  These plutons range in age from ~1091 to 1070 Ma (Walker, 1992; Connelly, unpublished work). Plutons younger than 1116 Ma are undeformed internally, although the country rock around plutons as young as 1091 Ma was deformed during intrusion (Reed, 1999)