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1993 Map of Mark West Springs

Name: 1993 Topographic Map of Mark West Springs
Creator: U.S. Geological Survey
Published: 1993
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1993

About this map

Petrified Forest stands as a focal point in this 1993 revision of the Sonoma County landscape, situated where the road networks of Porter Creek Road and Petrified Forest Road converge. The area is defined by a complex drainage system, with Mark West Creek and its many tributaries, such as Humbug Creek and Mill Creek, carving through the varied terrain. This map captures the transition between the agricultural expanses of Knights Valley and the steep, wooded heights of Redwood Hill and Chalk Mtn.

Infrastructure like Franz Valley School Road and St Helena Road provides a view into the rural development patterns of the late 20th century, connecting small settlements like Mark West Springs and the western edge of San Miguel. The inclusion of the Moristul Y Plan De Agua Caliente land grant boundary adds a layer of historical land tenure that continues to shape the northern reaches of the quadrangle.