U-shaped valley and associated features

• U-shaped valley formation - Before glaciation: Explain glacier formation.
• U-shaped valley formation - During glaciation: Explain abrasion and plucking. Plucking steepens valley sides and abrasion deepens valley floor. Gravity causes the glaciers to flow downhill following existing v-shaped valleys. Former interlocking spurs may be cut off by the glacier as it flows downhill leaving truncated spurs.
• U-shaped valley formation - After glaciation: The width and shape of the resulting glacier trough depends on the nature of the rock type. The valley becomes wider and straighter, with steep sides and flat bottom, often with a misfit stream which no longer fits the valley floor.
• U-shaped valley Example: Glencoe
• Ribbon Loch/Lake formation: U - shaped valley formation (processes and glacier formation). Ribbon lochs can form where soft rock becomes eroded more deeply than the harder rock surrounding it. Creating a long narrow hollow. Ribbon lochs can form where a terminal/ recessional moraine creates a dam.
• Ribbon loch Example: Loch Lomond
• Hanging valley formation: Add in u-shaped valley formation (leave out interlocking/ truncated spurs and misfit stream). Tributary valleys have smaller less powerful glaciers resulting in less deep u-shaped valleys. When glacier moves downhill and cuts off the interlocking spurs the tributary valley is left hanging above the main u-shaped valley.
• Hanging valley example: Glen Masson