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Assess the extent to which volcanic activity can influence landforms…

- - - - size and shape of glacial troughs in relation to igneous geology
        
        Ullswater, a ribbon lake, but with an irregular floor due to the presence of bands of resistant volcanic rock.
      - igneous rock contributing to size and shape of a corrie
      - Role of resistance rock from volcanic activity in roche moutonnee formation
        
        Norfolk Island: a roche moutonnee in middle of Ullswater formed by an outcrop of more resistant volcanic rock.
      - texture of till often related to geology
      - Borrowdale Volcanic Group (p56) very hard lava and ash formed in major eruptions about 450m ya that have withstood erosion nand make up the highest peaks - Scafell, Helvellyn and great Gable
        
        Helvellyn range - 950m, a "pyramidal peak".
      - granite intrusions 400 mya below the lake District . Erosion has revealed outcrops in Eskdale, Ennerdale and at Shap.
      - Erratics of Borrowdale Volcanics: carried from Shap and deposited in Cheshire, the Tees Valley and the North Yorks Moors. Bowder Stone in Borrowdale - a good example of an erratic.
    - - Ellipsoidal basin in Minnesota created by erosion has excavated the weaker shales more rapidly than the resistant volcanic rocks - lakes are in the shales.
      - Depositional rocks - coarse grained basalt, gabbro and granite