Surges of water channeled through moulins or in jökulhlaups (“yo-KOOL-lahps”) are proposed theories for the formation of these features’ “tunnel” variety. For 10 points each:
[10h] Name these features whose “hanging” type may form above a steep drop off due to varying erosion rates. Arêtes separate these features.
ANSWER: valleys [or troughs; accept cirques; accept hanging valleys or tunnel valleys; accept, BUT DO NOT REVEAL, glacial valleys or glacial troughs]
[10e] Arêtes and cirques are among the U-shaped valley formations created by these large masses of moving ice.
ANSWER: glaciers
[10m] Sediment leftover from glacial moraines often form skerries at the mouths of these flooded valleys, which easily form inlets to the sea due to their overdeepening.
ANSWER: fjords
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