GM-6 — Reconnaissance Geologic Map of Cañon Largo Thirty-minute Quadrangle

By Max E. Willard and Robert H. Weber, 1958, scale 1:126,720.

This map is centered on US-60 from Quemado to the Arizona state line. The oldest rocks exposed are Triassic Chinle Formation (now Group), which is overlain by Cretaceous sediments, Tertiary sediments, volcaniclastics, and volcanic rocks. Numerous basaltic cones and necks erupted Quaternarly basalts. The Gila conglomerate also extends into the southern portion of the mapped area.

Related 30-minute geologic maps of this region include:

• GM-1 — Hillboro Peak
• GM-2 — Luera Spring
• GM-3 — Piñonville
• GM-5 — Datil
• GM-10 — Mogollon
• GM-12 — Reserve
• GM-13 — Alum Mountain
• GM-14 — Las Cruces
• GM-15 — Virden
• GM-23 — Pelona