Bulletin . y largenumber of adits, crosscuts, drifts, levels and intermediate levels, noattempt was made to reproduce them, which would only have compli-cated the drawing. For similar reasons, the outline of the ore zonewas taken at three separated levels, only: the 2d, 5th and 10th. Thisshows a roughly elliptical shape in the upper levels, narrowing, length-ening eastward, and curving toward a crescent shape in the lowerlevels. The No. 7 level (not shown) has a distinctly crescent zone has a general dip to the southeast of about 60° to 65°. Itvaries up to 235 feet wide between wa
Bulletin . y largenumber of adits, crosscuts, drifts, levels and intermediate levels, noattempt was made to reproduce them, which would only have compli-cated the drawing. For similar reasons, the outline of the ore zonewas taken at three separated levels, only: the 2d, 5th and 10th. Thisshows a roughly elliptical shape in the upper levels, narrowing, length-ening eastward, and curving toward a crescent shape in the lowerlevels. The No. 7 level (not shown) has a distinctly crescent zone has a general dip to the southeast of about 60° to 65°. Itvaries up to 235 feet wide between walls and 800 feet long on the level, and averages al)Out 120 feet wide, with a length of nearly 1200feet on the No. 10 level. The term ore zone is deemed by the writer a better designation inthis case than ore-bodv, because all of the rock within the outlines PLATE XIV. OUTLINE OF ORE BODY NEW IDRIA QUICKSILVER MINE San Ben/to Co. Cal. Scale .- I inch = 200 feet(Tracec/ from f/ie mine map, Sepf /9 QUICKSILVER RESOURCES. Ill noted is not ore. The ore occurrences are not altogether are various veins, cross-veins, stock-works and main ore-body within the area is stock-works in sandstone andshale, and in places an impregnated sandstone, somewliat harder thanthe others. As will be noted from the map (Plate XII), the mine is inthe Franciscan metamorphie sandstones and shales and some distance
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