17 x 22" 15 minute sheet folio edition of June 1914 1st state, new information Fine condition -copper engraving

US Geological Survey Topographic Map of Petaluma (CA) Quadrangle, 1914 edition. In excellent condition, measures approximately 20 x 16 1/2 inches. Blue and tan palette is the most desirable and this issue has an additional color of green applied to mountain tops for grazing and forest lands. the newly available information is a first look at recent government surveyed lands, otherwise unknown in detail to others beyond those who owned it.