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Transcription
16. the well passes through coarse sands and gravels and if bailing seems to have little effect upon the water level, the well can be expected to leak considerably if it is not prbperly cased. In the Roswell artesian basin, New Mexico, J pert of the overlying formations consist J Fiedler, Albert G., and Nye, S, Spencer, Geology and Ground- Water Resources of the Roswell Artesian Basin, New Mexico: U. S. Geol. Survey Water-Supply Paper 639, 1933. of permeable material into which large quantities of artesian wat3r can escape from the wells. In the Honolulu artesian basin part of the over- lying formation consists of porous coral into which artesian water easily escaped after holes in the casing had been formed by corrosion. J J McCombs. John, and Fiedler, Albert G., Methods of Exploring and Repairing Leaky Artesian Wells: U. S. Geol. Survey Water-Supply Paper 596-A, 1927. In contrast to these examples, the overlying material at Las Yagas, especially in the lower part of the valley, consists largely of fine material, and the shallow sands probably are not continuous, being very irregular and lenticular, and do not provide the outlets for large quantities of underground leakage from the artesian wells.
