Characteristics of Igneous Rock

  • Igneous rocks have a crystalline nature. This is why they glitter in the sun or look glassy in appearance. The crystalline nature of igneous rocks shows that they contain crystals,
  • Igneous rocks are usually very resistant to erosion and other climatic elements.
  • They are very hard and contain no animal or plant remains (fossils).
  • Igneous rocks do not occur in layers and as such are regarded as non-stratified rocks.
  • Some Igneous rocks have little holes on the surface e.g. pumice rock.
  • Igneous rocks may be dark, grey or brown in colour.
  • Some igneous rocks may be heavy or massive.

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