Assess the extent to which volcanic activity can influence landforms developed within any one landscape system you have studied
Assess: Consider several options or arguments and weigh them up so as to come to a
conclusion about their effectiveness or validity.
Glaciated landscape system
Knowledge of geology / Lithology / structure
Volcanic activity: explosive, effusive, hot spot eruptions./ size and shape of different volcanoes
geology influencing glacial and fluvio-glacial processes.
size and shape of glacial troughs in relation to igneous geology
igneous rock contributing to size and shape of a corrie
Role of resistance rock from volcanic activity in roche moutonnee formation
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
granite intrusions 400 mya below the lake District . Erosion has revealed outcrops in Eskdale, Ennerdale and at Shap.
Helvellyn range - 950m, a "pyramidal peak".
Ullswater, a ribbon lake, but with an irregular floor due to the presence of bands of resistant volcanic rock.
Norfolk Island: a roche moutonnee in middle of Ullswater formed by an outcrop of more resistant volcanic rock.
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.
Volcanic Rocks that make up the Canadian Shield - alternating granits with sedimentary rocks in belts, formed 2700 mya when lava escaped through rifts in what was then the sea floor. Many volcanic formations lie buried beneath glacial deposits in the Laurentian Shield in Minnesota.
Volcanic debris was later deposited on sea floor forming sedimentary rocks.
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
CONCLUSION: Great extent: highest peaks,basins trough alignment (tal-y-llyn)
Iceland - much deposition of fine material - ash and young volcanic rock
Outwash plains
"Dirty" glaciers - Solheimajokull