Oakland, like most growing cities, started its climb to prosperity with the resources it had on hand. Those were land, soil, water, timber and stone. Today we produce no domestic stone. Here are the remains of six different quarries, five in Oakland and one in Piedmont.
Sibley Regional Volcanic Reserve is a former quarry where the basalt of a Miocene volcano was exploited for traprock.
The Morcom Rose Garden is said to be a former quarry; that would have been a gravel pit given that there is no bedrock mapped there.
The Hiller Highlands neighborhood is built around an old quarry where the highly faulted rocks (the Hayward fault is just to the left of this photo) were handy for making crushed stone.
Part of the Serpentine Prairie was exploited for rock at some point, probably for fill material.
Piedmont’s Dracena Park is the former Blake quarry, yielding Franciscan sandstone for aggregate under Oakland’s streets.
And the Zion Lutheran church, off Park Avenue, was built in an old quarry where sandstone of the Franciscan Complex was dug for crushed rock.
There are more of these; I just need to sort through some more photos. I think it’s important to source raw materials like stone from nearby whenever possible.