Landforms of Alpine GlaciationCirqueCirque GlacierValley GlacierAreteHornGlacial TroughDepositional LandformsGEO 155 1st Edition Lecture 22Last Lecture Streams as Geomorphic AgentsOutline of Current LectureI. Glacial Landformsa. Landforms of Alpine GlaciationII. SlidesCurrent LectureLandforms of Alpine GlaciationCirque- Ice begins forming towards the top of a mountain, the steep slope allows ice to move, glacier forms, follows out a basin in the mountainCirque Glacier- Glacier forms within an existing cirqueValley Glacier- Valley fills with iceArete- Steepened ridge that forms in between two eroded cirquesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Horn- Narrow, rocky peak (steep on all sides) that forms in between two cirque basinsGlacial Trough- U-shaped valley formed when a valley is eroded by a cirqueo Plucking creates “tarn” – lake formed by erosion; usually seen in a serieso More ice means more erosion in bigger valleys When a larger valley is connected to a smaller valley by a tributary, the bigger valley if often lowered by erosion creating a “hanging valley”- Water from the tributary and the smaller valley waterfall into the hanging valley belowDepositional Landforms- Terminal and recessional moraines form in valley glaciers as they retreat, but the glacier moves out further, melting on either side, till is deposited on either side known as “lateral moraine”o If a stream passes through, it fills the moraine, washing out the terminal moraine, but the lateral moraine remains in
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