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    • Pumice, a rhyolite rock.
    Rights: Hannes GrobeCreative Commons 2.5 Published 9 April 2010 Size: 610 KB Referencing Hub media

    Pumice, a rhyolite, is very common in the central North Island. It may still have evidence of the bubbles of gas trapped as the rock solidified.

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      ACTIVITY

      Lost – a hot rock

      In this activity, students examine an igneous rock and synthesise these observations into a poster that includes characteristic features of igneous rocks. By the end of this activity, students ...

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      2. ARTICLE

      Types of volcanic rock

      Rocks are not all the same. Some are heavy, some are light. Others are dark, while some can be almost pure white. Even igneous rocks that are all formed from magma in the Earth’s mantle can look ...

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