GLACIAL LANDFORMS, EROSIONAL FEATURES | Micro- to Macroscale Forms

摘要: Some of the most familiar products glaciation are examined in this article, including striae, friction cracks, p-forms, and roches moutonnees, which all formed by subglacial processes abrasion quarrying. Abrasion is process glaciers erode smooth their bed indentation fracture plowing clasts polishing shearing fine sediment across bedrock. Quarrying bedrock through fracturing plucking dominant erosional environment provides material for process. The role water pressure fluctuations subcritical crack growth major importance both Products include streamlined negative-relief features, whereas crag tail, rock drumlins, whalebacks positive-relief features. Roches moutonnees quarrying abrasion, they form a partially feature. All these forms may be used to reconstruct former ice-flow directions.