Geologic Guidebook Along Highway 49 Sierran Gold Belt the Mother Lode Country
Geologic Guidebook Along Highway 49 Sierran Gold Belt the Mother Lode Country
California Division of Mines And Geology
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Hummocky limestone bedrock at Columbia. View is northeast toward St. Anne's Church. More than $17, 000, 000 in gold was taken from this surface during the '50's FlG. 19. Ixjoking northeast toward eroded face of old hydraulic pit at North Columbia. Crossbedding can be seen in the upper left hand part of the picture. Photo by Olaf P. Jenkins. Fio. 18. Rolling exhumed Eocene land surface as seen to the northwest of Kelsey, El Dorado County. Fio. 20. Hummocky limestone bedrock at Shaws Flat, a rich... placer camp much like Columbia, which lies a few miles to the northeast. 52 GEOLOGIC GUIDEBOOK ALONG HIGHWAY 49 [Bull. 141 Fio. 21. View south down the North Fork of the American River from the High- way/ 49 bridge at the El Dorado-Placer County line. The abandoned Pacific Portland Cement Company railroad bridge may be seen in the background. The beveled bedrock in the right foreground is a green meta-volcanic of doubtful age. FIG. 23. Adit and buildings of the Pacific Minerals Company slate mine on the North Fork of the American River two miles north of Placerville.
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