Monday 7 March 2011

Distortion in rocks after Earth movements

Have you tried the Earthlearningidea 'Squeezed out of shape; detecting distortion after rocks have been affected by Earth movements'? A carefully made mould of a shell is deliberately distorted before a plaster cast is made, producing an artificial ‘fossil’. This represents the squeezing which often takes place when sedimentary rocks, with their included fossils, are affected by strong lateral pressures in the Earth, e.g. during mountain-building at active plate boundaries.
Search the website for other activities related to metamorphism and plate movements.

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