Cirques - AntarcticGlaciers.org
Oct 5, 2020 · Classic cirques take the form of armchair-shaped hollows (see image below), with a steep headwall (which often culminates in a sharp ridge, or arête) and a gently-sloping or overdeepened valley floor (see diagram below).
True cirque growth only occurs once the thickness of snow patches increases to a point at which glacier ice can form by compaction. Once formed, glaciers widen and deepen cirques by subglacial abrasion and quarrying of the hollow floor and lower headwall3 (see diagram below). Cirques can also
Cirque glaciation landsystem of upland Britain
Oct 5, 2020 · In summary, the cirque glaciation landsystem 6 created throughout upland Britain during the Loch Lomond Stadial contains: (1) outer limits marked by moraines and drift, with recessional moraines on some cirque floors indicating active retreat in deglaciation; (2) erosional landforms, such as roches moutonnées and striations that provide ...
Moraine types - AntarcticGlaciers.org
Jun 22, 2020 · Summary of the main moraine types and their spatial patterns. The top diagram is a cross-section through a cirque glacier. The bottom diagram is drawn in plan view, looking down on the surface of a valley glacier made up of several tributaries. Image created by J. Bendle.
Cirque glacier - AntarcticGlaciers.org
Jan 7, 2020 · Cirque glacier. By Jacob Bendle – Last updated 07/01/2020. Leave a Comment by Jacob Bendle Posted on 07/01/2020 . By Jacob Bendle – Last updated 07/01/2020. About Jacob Bendle I am a Quaternary geologist with a focus on palaeo-ice sheet dynamics and palaeoclimate change during the last 20,000 years. I study glacial landforms to reconstruct ...
Macroscale Erosional Landforms - AntarcticGlaciers.org
Jun 28, 2024 · Figure 1: Schematic diagram of macroscale erosional landforms found in glaciated landscapes. Credit: Caroline Taylor, adapted from National Park Service, Public domain, via Wikimedia Commons. Types of erosional landforms Parabolic Valleys
Roches moutonnées - AntarcticGlaciers.org
Dec 8, 2020 · Roches mountonnées develop their distinctive morphology due to the pattern of stress on a bedrock surface beneath a sliding glacier, as shown in the diagram below.
Moraine formation - AntarcticGlaciers.org
Jun 22, 2020 · The key moraine-forming processes are shown in the diagram below and explained through this page. Summary of the three main moraine-forming processes. Push moraines (top) form during periods of ice-front stillstand or …
Cirque glaciers are either localised to armchair-shaped bedrock hollows on a mountain side (see image below), or to the uppermost parts of a glacial trough, where they flow into larger valley glaciers.
Eskers - AntarcticGlaciers.org
Aug 18, 2020 · Eskers on paleo-ice-sheet beds are more abundant in areas of crystalline bedrock with thin coverings of surficial sediment than in areas of thick deformable sediment e.g., 9,4.This is because meltwater flowing at the bed is more likely to incise upwards into the ice to form an R-channel where the bed is hard; where the bed is deformable, meltwater is more likely to incise …