GLACIATION, Glacier – A slow-moving river of ice., Cryosphere – All frozen parts of Earth., Ice sheet – Thick ice covering large land areas., Mountain glacier (alpine glacier) – Glacier in mountains., GLACIER FORMATION, Snow – Fresh, fluffy frozen water., Compaction – Snow squeezed by weight., Firn – Grainy, partly compacted snow., Glacial ice – Dense ice with little air., Accumulation – Build-up of snow over time., GLACIER MOVEMENT, Gravity – Force pulling ice downhill., Flow – Movement of glacier ice., Internal deformation – Ice crystals slowly bend and move., Basal sliding – Glacier slides over ground., Meltwater – Water from melted ice., Crevasse – Deep crack in ice., Snout – End of a glacier., Iceberg – Floating block of ice., Ice shelf – Floating edge of an ice sheet., GLACIAL EROSION, Erosion – Wearing away of land., Abrasion – Rock scraping by debris in ice., Plucking – Ice pulling rocks from ground., Freeze-thaw weathering – Water freezes and breaks rock., Striations – Scratches left on rock., TRANSPORT, Transport – Movement of rock by ice., Supraglacial – On top of glacier., Englacial – Inside glacier., Subglacial – Under glacier., DEPOSITION, Deposition – Dropping material by ice., Till – Unsorted mix of rock, sand, clay., EROSIONAL LANDFORMS, U-shaped valley – Wide, steep-sided valley., Corrie (cirque) – Bowl-shaped hollow., Arête – Narrow ridge between corries., Pyramidal peak – Sharp mountain peak., Truncated spur – Valley side cut steep by ice., DEPOSITIONAL LANDFORMS, Moraine – Rock left by glacier., Terminal moraine – At glacier end., Lateral moraine – Along glacier sides., Ground moraine – Spread across valley floor., Erratic – Rock moved far from origin., Drumlin – Smooth hill shaped by ice.

Glaciation

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