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This series of maps represents a loosely defined group of geological maps, some of which have been published, that have been compiled on various scale base sheets, from 1958 to 1970.

The individual maps were prepared with conventional manual cartography.

The Hard Copy Map has been scanned at 600DPI, down-sampled to 300DPI, and georeferenced. The digital images have been combined into ImageService dataset for dissemination and released as Web Map Service.