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Mike Tuke’s

A = activity, D = demonstration, E = experiment, Pa = paper exercise,TE = thought experiment. Should be done as I = individual, P = pair, G = group. min = minutes. F = further information.
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Unconformities Making unconformities   A P 15 min Students lay several different coloured sheets (2cm by 10cm) of plasticine on top of each other, then fold them, then cut off the top using a knife, after which they lay two more layers on top.  One can also add faults and dykes Angle of dip  A I 5 min F Students are given diagrams of unconformities where the strata above the unconformity are dipping. Students work out the angle of dip of the lower strata at the time the unconformity formed.  Use only the simplest case where the strikes of both sets of strata are parallel.  Minimum thickness eroded  A I 5 min Students are given a cross section of an unconformity and must work out the minimum thickness that has been eroded which is the thickness between the youngest and oldest bed eroded.
Earth Science Activities and Demonstrations