Tectonic evolution of middle to deep crustal continental lithosphere:

A study of major tectonic boundaries in the Proterozoic southwestern United States and western Canadian Shield

figure modified after CDROM Working Group (2002) and Bryant et al. (2000)

El Oro Mountains

Pecos Thrust

El Oro Mountains, northern NM
figure modified after Tella et al. (2000)
Mary Opx-bearing granite mylonite