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New Almaden Mine (Calif.) Collection
M0270  
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Collection Overview
 
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Background
In 1845, Captain Andres Castillero of the Mexican Army was sent on a routine scouting patrol through what is now northern California, then part of Mexican territory. As an amateur geologist, Castillero recognized the possibility that the rolling hills held vast mineral deposits. During a visit to local Indians, his suspicions were confirmed. The Indians told him of the red rock they used to make paint, and of the cave where the walls were solid deposits of this red rock. A trip to the cave left Castillero amazed; the red rock was cinnabar, high grade mercury ore. He quickly filed a claim with the most suitable local authority, a justice of the peace, and received mineral rights to excavate the mine site. The rights were divided among five principal holders, including Castillero, his guide, and the Indians who led him to the mine.
Extent
86 Linear Feet
Restrictions
While Special Collections is the owner of the physical and digital items, permission to examine collection materials is not an authorization to publish. These materials are made available for use in research, teaching, and private study. Any transmission or reproduction beyond that allowed by fair use requires permission from the owners of rights, heir(s) or assigns. Some of these materials are believed to be in the public domain. There are no restrictions on use of public domain materials.
Availability
Open for research. Note that material must be requested at least 36 hours in advance of intended use.