D.3.1 outline the method for dating rocks

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Assessment statement. Knowledge of the degree of accuracy and the choice of isotope to use is expected. Details of the apparatus used are not required.

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This paper aims to provide an overview concerning the optically stimulated luminescence OSL dating method and its applications for geomorphological research in France. An outline of the general physical principles of luminescence dating is given. A case study of fluvial sands from the lower terrace of the Moselle valley is then presented to describe the range of field and laboratory procedures required for successful luminescence dating.

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Assessment statement. Knowledge of the degree of accuracy and the choice of isotope to use is expected. Details of the apparatus used are not required.

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The rock components of the crust are slowly but constantly being changed from one form to another and the processes involved are summarized in the rock cycle Figure 3. The rock cycle is still active on Earth because our core is hot enough to keep the mantle moving, our atmosphere is relatively thick, and we have liquid water. On some other planets or their satellites, such as the Moon, the rock cycle is virtually dead because the core is no longer hot enough to drive mantle convection and there is no atmosphere or liquid water.

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Radioisotopes are used to determine the age of rocks containing fossils. The age is determined by analysing how much the isotope has decayed. Carbon 14C and Potassium 40K dating, the age in half-lives can be deduced from the decay curve.

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Geology can also include the study of the solid features of any terrestrial planet or natural satellite such as Mars or the Moon. Modern geology significantly overlaps all other earth sciencesincluding hydrology and the atmospheric sciencesand so is treated as one major aspect of integrated earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure.

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