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About this collection

Established by the California legislature in 1880, the State Mining Bureau bill required the State Mineralogist to “…make a report in detail to the Governor, showing the amount of disbursements of the Bureau under his charge, the number of specimens collected, and giving such statistical information in  reference to mines and mining as shall be deemed important.”  The manifestation of this was the annual Report of the State Mineralogist

 

Beginning with the first report which covered only the second half of 1880, the reports were released each year up until 1890, after which they were released every two years until 1896. No reports were issued for the years 1897 through 1912.  In 1914 the reports resumed on a biannual basis through 1922 and then annually again until 1961. From 1947 to 1958 the annual reports received a name change and became the California Journal of Mines and Geology.  In 1959 the name was changed back to the Report of the State Mineralogist for three years before becoming known in 1965 - after a four year hiatus - as it is today, the Report of the State Geologist. 

 

The reports included in this collection cover the years 1880 – 1958 and include everything from Volume 1 of the Reports of the State Mineralogist to Volume 54 of the California Journal of Mines and Geology.

 

Though varying somewhat over time in presentation and emphasis, the reports up through the 1950’s focused on mines and mineral resources of individual counties.  They were organized in a hierarchical structure first by county or district, then by mineral type or commodity, and finally by mine name.  Generally a brief introduction to mineral production and geology of the region was provided, followed by short entries detailing individual mines and mining districts.  Table listings of mines by commodity were generally present at the end of each county report. Many of the volumes of this period also contained papers on other topics related to the geology of California.  In addition, maps, drawings, and photographs are included in nearly all of the reports. 

 

In the 1960’s, as the main responsibilities of the California Division of Mines and Geology (now California Geological Survey) shifted from mineral resources to geologic hazards, the content of the reports became broader and turned more to a summary of the Division’s activities throughout the previous year.   

 

In addtion to the annual reports is the Consolidated Index of Pulbications which covers the years 1880-1948.  For a guide to the locations of County Reports within this collection use the Quick Guide to County Reports found here

 
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