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• or may change laterally almost to the point of non-recognition <br />within 1-2 miles. <br />Coal seams are fairly persistent, more so than most sand- <br />stone beds. Several seams have been traced, pinching and swelling, <br />for distances of several miles. Almost without exception coal scams <br />are underlain by 6-24 inches of soft, impermiablc, claycv shale. <br />Coal seams are most often capped with a thin bedded shale or sandy <br />shale 12-24 inches thick, which is frequently overlain by a Lard, <br />massive sandstone of varying porosity. <br />T}~~ical Menefee aquifers might be relatively thin lensing sand- <br />stone overlain and/or underlain by shaley beds, and which may <br />gradually change into a more shaley facies within a mile or two. <br />• The Menefee can be considered as an irregular assemblage of such <br />aquifers, essentially each a hydrological unit of limited size and <br />capacity. A sort of lithologic cleavage in the sediments may increase <br />their capacity, and they may be interconnected by structual deform- <br />ities, both of which could enhance their potential as aquifers. <br />The above description and discussion of Menefee aquifers may <br />explain why soiree local water well owners have experienced low and <br />unreliable water yields, especially from shallow wells. <br />A crude estimate can be made of the ground waters awarded to <br />the Menefee each year and which would flow throughA pplicants coal <br />lands. 1'he assumptions receded for the estimate arc: that most of <br />r~ <br />U <br />-25- <br />