Preliminary map of temperature gradients in the conterminous United States

摘要: Temperature gradients have been determined from temperature/depth measurements made in drill holes deeper than 600 m and used the construction of a temperature-gradient map conterminous United States. The displays temperature (in /sup 0/C/km) that can be expected to exist regionally conductive thermal regime depth 2 km. major difference between this AAPG-USGS is midcontinental region where does not demarcate division colder eastern warmer western regimes. A comparison with heat-flow Sass et al. (1980) indicates commonly reflect regional heat flow, gross east-west States on basis flow also expressed by gradient.