The deep boring at Spur . Plate 1. B. The rock described under number 74 (3) in the wellsamples. The structure of this rock is such as to suggest thatit may have been an oolite, from which much of the original materialhas been dissolved, causing the spherules to flatten. Vertical section,X Plate 2. Vertical section of dolomite from 1600 feet below sur-face. See description of sample number 77. X 40.

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Keywords: ., bookauth, bookcentury1900, bookdecade1910, bookidcu31924004622084