Geology Flags Project:

Protogaea Civica I (Franciscan Formation, San Francisco, CA)

Coorelation of Flags with Localized Bedrock and Exposures

This is the initial study for the project, later to be named: Protogaea Civica I, (Franciscan Formation/San Francisco, CA), 2004, comprised of six flags depicting the geologic materials and basic structures of Holocene architecture and the Franciscan Formation, San Francisco, CA, from the top:

Reinforced Concrete
Ferruginous Radiolarian Chert
Graywacke/Metagraywacke Sandstone
Shale Matrix Melange/Shear Zone

SF flag detail; SF flag site view; master flag legend
project description; notes/credits for SF flags