| The dotted line may be assumed to be a geotherm having a temperature of viscosity. |
| The anomalously high temperatures are assumed to extend down from the surface to 200 km depth, where they join the normal geotherm. |
| As should be standard on all thermal grouting projects, samples were sent to Geotherm Inc. |
| The magnitude of the geothermal gradient thus varies with the shape of the geotherm. |
| The batch of mantle ascends adiabatically, whereas the geotherm becomes conductive. |
| There is some controversy on this point since the Archean geotherm was hotter. |
