Pg. 29-32, pl. 4. Maria plutonic complex. Contains crystalline dolomitic limestones, quartzites, and schists, cut by dioritic and granitic rocks, usually in the form of sills, and by many pegmatitic dikes; metasediments are granitized and locally injected lit-par-lit by pegmatitic granite. Both the diorite and the granite are younger than the Paleozoic Maria beds [formation]; hence, they may be late Paleozoic or even as young as late Mesozoic. They are tentatively assigned to late Paleozoic.
Covers an area of about 10 sq mi in Maria Mountains, Palm-Springs-Blythe area, Riverside Co., southern CA.

Source: US geologic names lexicon (USGS Bull. 1200, p. 2377).