
The San Andreas Rift Zone forms the dominant geological spine of this coastal landscape, creating the linear trough of Tomales Bay that separates the mainland from the Tomales Point peninsula. This 1990s record of western Marin County highlights a rural economy rooted in coastal ranching and aquaculture, with numerous historic family holdings such as Upper Pierce Ranch, Lower Pierce Ranch, and Kehoe Ranch dotting the interior hills. Along the eastern shore, small settlements and landings like Marshall, Hamlet, and Lairds Landing are linked by the old Railroad grade and Walker Creek. The map also preserves details of local education and industry, from the Joint Union High Sch in Tomales to the active Oyster Pen operations and the University of Pacific Marine Station of Biological Science near Dillon Beach.
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This is the sole edition of this map. No revisions or reprints were ever made.
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