“…The values accepted were selected after comparison of published measured values (Clark, 1966;Sass and others, 1971a;Horai and Baldridge, 1972;Sibbitt andothers, 1979, Smith andothers,, 1979) with the calculated ones. At shot point 1, the average value of thermal conductivity for shales for 17 sets of data, 6.28+0.72 mcal-cm-l-s'l-°C"l (Clark, 1966), was used.…”