
Pechanga Indian Reservation and Pala Indian Reservation dominate the high-relief landscape of this Southern California survey, which details the rugged boundary between Riverside and San Diego counties. The southern portion of the sheet reveals a significant mining district, particularly for gemstones, with the Tourmaline King Mine, Tourmaline Queen Mine, and Pala Chief Mine clustered near Pala Creek. This concentration of tourmaline and lithium-bearing pegmatite mines reflects the region's unique mineral history.
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3 editions found
1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1901 · San Jacinto
USGS Topo · 1:125,000
1901 · Elsinore
USGS Topo · 1:125,000
1901 · San Luis Rey
USGS Topo · 1:125,000
1903 · Ramona
USGS Topo · 1:125,000
1904 · Southern California Sheet No. 2
USGS Topo · 1:250,000
1904 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1939 · Palomar Mountain
USGS Topo · 1:62,500
1942 · Temecula
USGS Topo · 1:62,500
1942 · Hemet
USGS Topo · 1:62,500