Title
Graywacke
Alternative Title
Sandstone
Identifier
FR-12
Description
Sand sized quartz grains and smaller feldspars make up the matrix. Grey-brown sand weathers to a rusty golden color.
(Thin Section FOV: 1.28mm)
(Thin Section FOV: 1.28mm)
Date
Not given
Contributor
Western Minerals, Inc.
Spatial Coverage
Old quarry face in north side of Telegraph Hill, on Kearny St, just south of Francisco Street.
Temporal Coverage
Mesozoic
Accrual Method
Purchased from Western Minerals, Inc.
Number of Thin Sections
1