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2-3 <br />~ • with root mean square errors of Lesa than ten. These four soundings <br />~ appeared to be affected by some electrical interference either from power <br />lines or buried pipelines. <br />The basic model consisted of from five to seven Layers: a dry, <br />thin Band unit; saturated, uncompacted Band; saturated, semi-compacted <br />Band; clay and shale; a Chin, interbedded sand; shale; and coal. The <br />models were all based on this sequence. Some models did not have the <br />4 thin interbedded sand and some of the eastern sounding models did not <br />have the coal layer. <br />C• <br /> <br />• <br />~.. <br />