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Lowland landscapes are [layers] of [sedimentary] rock. They've been folded and reshaped by tectonics so you get gentle dip slopes leading to a dome of [chalk], with a steep [scarp] slope the other side. During an Ice Age all of this ground is [permafrost], and water can't [infiltrate]. It runs off via [overland] flow (mini-rivers) which cause [vertical] erosion and [valleys] to form. When the temperatures are warmer, the chalk is [permeable] and water can infiltrate and [percolate] down into the rock. .

Yr 10 - 1GB2 4a.3 - Lowlands Cloze Pt. 1


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