Greathouse Mine - Antioch, CA
Posted by: 
saopaulo1
N 37° 57.304 W 121° 51.934
10S E 599662 N 4201436
A mine entrance at the Black Diamond Mines Regional Preserve in Antioch, CA.
Waymark Code: WMKZNH
Location: California, United States
Date Posted: 06/22/2014
Views: 5
"Take a moment and gaze down the Greathouse Portal, your entrance into vast underground spaces filled with an intriguing human and geologic history. What was once the ocean floor provided raw materials (silica sand) for glass making during the early twentieth century. When R. Marvin Greathouse began hollowing these hills to mine the silica sandstone, he could not have known that the cavernous rooms left behind would fascinate people for decades to come. Today this portal serves as your gateway to the past and entrance into a unique underground visitor center. Join us during open hours, and step into the earth and into the past."
Mine Type: Tourist Mine
Mineral Collecting: No
Material Mined: Non-Precious Metal
Operation: Underground Mine
Surface Features: Yes
KNOWN DANGERS:
None
Any associated website: [Web Link]
Any Other information: Not listed
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Visit Instructions:
Optional photograph welcomed.
Recent Visits/Logs:
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