The structural and industrial materials of California (1906)
Aubury, Lewis E., b. 1862 · Sacramento, W.W. Shannon, Superintendent State printing · leaf 166
)orphyritit character, and l)reaks easily, requiring very little])owder. The rift is not appreciable, the fracture occurring generallyon a, curved ])lane, wlii^li, however, is very smooth. The rock can becasilv dressed and takes a good polisli. It is used for rubble masonry, … n.L. No. 74. WVLIKS KIlVoLlTE (.QUARRY, SAN LUIS OBISPO COUNTY. coping stone, curl:» stone, etc. It was used in the Presbyterian Church,and the luasement of the Free Library, San Luis Obispo. In 1896 ]\Ir. William Irelan made an analysis of the rock from theold quarry, giving it silica, B4.15 per…
Building stones · Portland cement · Clay · Mines and mineral resources
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