Key term for Edexcel GCSE Geography A, used in Changing Landscapes of the UK.
Crystals that grew together during solidification, fitting into each other like a jigsaw puzzle, making igneous rocks very strong and impermeable.
Interlocking crystals appears in Edexcel GCSE Geography A revision content for The Physical Environment, especially Changing Landscapes of the UK and Geological Variations in the UK.
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