The last part of the book covers a range of thermodynamic models of the lithosphere and goes on to show how these can be used to reconstruct the thermal history of individual sedimentary basins. In theory and with practical examples the first two parts of the book discuss the sources of heat within the crust, describe how to maximise the accuracy of temperature data, cover the measurement of the thermal properties of rocks, and explain a number of maturity indicators. Heat flow data can provide an indication of past geological events and present economic potential of fossil fuel deposits. Crustal Heat Flow A Guide to Measurement and Modelling Crustal Heat Flow: A Guide to Measurement and Modelling is a handbook for geologists and geophysicists who manipulate thermal data, particularly for petroleum exploration.