North of the Hot Zone

Interest in Eastern Washington’s abundance of shallow thermal wells leads one to examine the geologic context.  Visually, this US Geologic Survey Map of the Pacific Northwest shows a strong proliferation of shallow thermal boreholes. These thermal wells have varying quality of data (and in some cases the wells have no thermal data, but were simply listed as warm waters).  28 of these boreholes have waters exceeding 150C/300F  The link to the report is here The proper title/reference is

Digital maps of low- to moderate-temperature geothermal springs and wells in the Pacific Northwest: a contribution to the Interior Columbia Basin Ecosystem Management Project
by
Pamela D. Derkey and Bruce R. Johnson
Open-File Report 95-689

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