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eskers
Gold in eskers and gyttja overlying auriferous till, Regnault deposit, Quebec
Okanogan lobe tunnel channels and subglacial floods into Moses Coulee, Channeled Scabland, northwestern United States
Tunnel valley infill and genesis revealed by high-resolution 3-D seismic data
Regional stagnation of the western Keewatin ice sheet and the significance of meltwater corridors and eskers, northern Canada
Evidence for glacial geological controls on the hydrology of Maine (USA) peatlands
Three-component seismic land streamer study of an esker architecture through S- and surface-wave imaging
Early Permian diamond-bearing proximal eskers in the Lichtenburg/Ventersdorp area of the North West Province, South Africa
A geomorphological reconstruction of the deglaciation of Loch Etive during the Loch Lomond Stadial
Landform signature of the Laurentide and Cordilleran ice sheets across Alberta during the last glaciation
Increased channelization of subglacial drainage during deglaciation of the Laurentide Ice Sheet
The life and times of the Cordilleran Ice Sheet around the southern Fraser Plateau, British Columbia
Abstract This field guide focuses on glacial history, dynamics and processes, and postglacial landscape adjustments in the southern Fraser Plateau region. Located between the Coast and Columbia Mountains in south-central British Columbia, Canada, the southern Fraser Plateau was near the geographic center of the last (marine oxygen isotope stage [MIS] 2) Cordilleran Ice Sheet (CIS). The transition from cold to warm-based ice during MIS 2 is recorded in till sedimentology and structural geology. The perceived absence of large deglacial recessional moraines has been used as evidence that ice regionally stagnated because of a rapid rise in equilibrium line altitude. However, glacioisostatic rebound orientations, ice-marginal channel and grounding-line and push moraine distributions, and reconstructions of late-glacial ice-marginal lake evolution suggest a systematic northwestward pattern of active ice-margin retreat toward the Coast Mountains, accompanied by regional thinning. Eskers and erosional corridors record drainage of supraglacial lakes or ice-marginal water sources in or over thin ice. Many ice-dammed lakes drained catastrophically. Following lake drainage, streams incised valley fills, leaving behind terraces capped by paraglacial fans and eolian sediment. In sum, we examine (1) valley-fill sediments that record Quaternary history dating back to the early or mid-Pleistocene; (2) till, moraines, erosional corridors, and eskers that provide evidence for MIS 2 CIS dynamics and hydrology; (3) late-glacial ice-marginal lake sediments and landforms that allow reconstruction of lake evolution and drainage, and changing ice-margin positions; and (4) the character and ages of river terraces, paraglacial fans, and eolian sediments that record the timing and nature of postglacial landscape adjustments.
Glacial dispersal and mode of occurrence of metals in till and esker gravel at Kumpuselkä, northern Finland
MODES OF SEDIMENTATION AND GLACIOLOGICAL ASPECTS OF THE PERMO-CARBONIFEROUS DWYKA GROUP IN THE ELANDSVLEI – ELANDSDRIF AREA, SOUTH AFRICA
Sequence stratigraphy of a glaciated basin fill, with a focus on esker sedimentation
Geology of the Ice Age National Scenic Trail
ABSTRACT The Ice Age National Scenic Trail leads hikers on a 1200-mi (1900-km) tour of glacial and other geologic features across the State of Wisconsin. This one-day field trip highlights glacial landforms of the Superior Lobe of the southern Laurentide Ice Sheet in northwestern Wisconsin. Here the Ice Age Trail features spectacular end moraines, low-relief and high-relief hummocky topography, ice-walled-lake plains, eskers, tunnel channels, striations, and water-scoured features on basalt. The field trip involves several short hikes on parts of the trail, including one on a classic esker located in a tunnel channel. We argue that there is paleoglaciological significance to differing landform assemblages on the older, low-relief Emerald Phase land surface and the younger St. Croix Phase moraine, which has numerous high-relief hummocks, ice-walled-lake plains, and tunnel channels. Large potholes from the drainage of glacial Lake Superior are present at the Interstate State Park Unit of the Ice Age National Scientific Reserve.