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Drumlins and marginal moraines

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Journal Article
Journal: GSA Bulletin
Published: 01 January 1895
GSA Bulletin (1895) 7 (1): 17–30.
..., northern Europe, Patagonia, and other glaciated areas, acted in eroding, mingling, transporting and depositing the various drift formations. All the diverse phases of the till or ground moraine, also called boulder-clay, from its heterogeneous materials, and including much englacial drift, which...
Image
A: Location map. B: 1995 aerial orthophotograph in mosaic with 1 m resoluti...
Published: 01 October 2010
hillshade model of ice marginal area in 2008. Note location of section 1 and lateral meltwater channels incised in drumlin. Small recessional moraines and crevasse fills drape drumlins. D: Ice-margin and surge history for Múlajökull and neighboring non-surge-type Nauthagajökull.
Image
<span class="search-highlight">Drumlins</span> and megascale glacial lineations (MSGLs) on the till plains north ...
Published: 23 January 2018
Fig. 5. Drumlins and megascale glacial lineations (MSGLs) on the till plains north and south of the Oak Ridges Moraine recording two paleo ice streams converging on Oak Ridges Moraine ( Fig. 6B ). Recessional moraines identify former ice margin positions during retreat. [Colour online.]
Series: GSA Special Papers
Published: 30 January 2018
DOI: 10.1130/2017.2530(06)
EISBN: 9780813795300
... in southern Michigan into four land systems, i.e., areas of similar sediment-landform assemblages. Land system 1 ( Fig. 3 ), the southernmost, extends from a large, post-LGM moraine, the Sturgis moraine, lying near the Michigan-Indiana border, to the proximal (NE) margin of a large drumlin field (the Union...
FIGURES | View All (15)
Journal Article
Journal: GSA Bulletin
Published: 01 January 1962
GSA Bulletin (1962) 73 (1): 73–100.
... in this region. The Wadena drumlin field has a fanlike form with its long axis trending southwest and a fan margin of 70 miles along 130° of arc. The fan pattern suggests ice movement from the northeast rather than from the southwest as Leverett suggested. Studies of pebble lithology and carbonate content...
Journal Article
Journal: Geology
Published: 01 September 1978
Geology (1978) 6 (9): 562–566.
...James D. Carl Abstract A belt of oriented till ridges along the southern margin of the St. Lawrence Valley, New York, is shown to be similar in form and occurrence to Swedish Rogen moraine, Canadian ribbed moraine, and Finnish hummocky active ice moraine. It is the first such occurrence described...
Image
Ice <span class="search-highlight">marginal</span> features, western Wollaston Peninsula, ticks on upice side of ...
Published: 03 April 2000
Fig. 6. Ice marginal features, western Wollaston Peninsula, ticks on upice side of lines. The features are primarily end moraine ridges (about 70%); otherwise lateral meltwater channels. The features trending across the Kugaluk River drumlin field (cf. Fig.  3 ) are De Geer moraines.
Journal Article
Journal: GSA Bulletin
Published: 01 February 1990
GSA Bulletin (1990) 102 (2): 243–251.
... to the terminal moraine, but largescale glacial thrust systems are even more common. In contrast, the part of the moraine formed by the Superior lobe is composed of closely spaced recessional ridges with little ice-stagnation topography. Recessional ice margins are marked by the termination of eskers and tunnel...
Image
<span class="search-highlight">Moraines</span> and flow sets. (1) Glacial lineation; (2) <span class="search-highlight">drumlin</span>; (3) major offsh...
Published: 18 October 2016
Fig. 7. Moraines and flow sets. (1) Glacial lineation; (2) drumlin; (3) major offshore moraine; (4) minor offshore moraine; (5) former ice margin position on land; (6) area with few erratics and landforms of glacial erosion on Hoy. RR, Reay Ridge. Data for 1 – 3 and flow sets (fs) modified from
Journal Article
Published: 01 February 1988
Canadian Journal of Earth Sciences (1988) 25 (2): 262–279.
... moraines resulted from intense marginal compressive flow that sheared and stacked thick, coarse sediment ridges or plates. This lateral shearing may be attributed to streaming or large ice surges. Drumlin exposures showed undeformed, interbedded, stratified sediments that appear to have accumulated...
Series: GSA Special Papers
Published: 30 January 2018
DOI: 10.1130/2017.2530(01)
EISBN: 9780813795300
... show speculative ice-margin positions between the two known moraines. Linear valley scours are parallel to subparallel to glacial lineations and drumlins on uplands. The lineations are generally perpendicular to moraines and ice-margin positions. Locations of Figures 8A and 8B are shown. MO...
FIGURES | View All (12)
Journal Article
Journal: GSA Bulletin
Published: 01 August 1990
GSA Bulletin (1990) 102 (8): 1055–1064.
... or lowering τ b by .5 bar results in maximum thickness differences of +21% and -26%, respectively. Simulating ice recession, a series of ice-marginal, terminal positions were plotted for a basal shear stress of 1 bar. These predicted terminal positions agree well with locations of mapped moraine deposits...
Journal Article
Journal: Geology
Published: 01 October 2010
Geology (2010) 38 (10): 943–946.
... hillshade model of ice marginal area in 2008. Note location of section 1 and lateral meltwater channels incised in drumlin. Small recessional moraines and crevasse fills drape drumlins. D: Ice-margin and surge history for Múlajökull and neighboring non-surge-type Nauthagajökull. ...
FIGURES | View All (5)
Series: Geological Society, London, Memoirs
Published: 21 October 2022
DOI: 10.1144/M58-2021-17
EISBN: 9781786205841
... by glacial geomorphologists was to result in significant developments in understanding the process-form regimes of subglacial, marginal and proglacial landforms, particularly the recognition of landform continua and hybrids. Advances resulting from this included the recognition of different modes of moraine...
FIGURES | View All (41)
Journal Article
Published: 01 February 1999
Journal of the Geological Society (1999) 156 (1): 63–72.
... the earlier curved elements resulting from activity of the Armagh ice stream (flow stage C). These flow stages can therefore be clearly distinguished on a stratigraphical basis. Southwestern margins of the drumlin field around Rosslea and Lisbellaw are not marked by an obvious topographic limit or moraine...
Journal Article
Published: 23 January 2018
Canadian Journal of Earth Sciences (2018) 55 (4): 373–396.
...Fig. 5. Drumlins and megascale glacial lineations (MSGLs) on the till plains north and south of the Oak Ridges Moraine recording two paleo ice streams converging on Oak Ridges Moraine ( Fig. 6B ). Recessional moraines identify former ice margin positions during retreat. [Colour online.] ...
FIGURES | View All (14)
Journal Article
Published: 01 October 1998
Canadian Journal of Earth Sciences (1998) 35 (10): 1152–1167.
..., southern Ontario. A model for the origin of the Oak Ridges Moraine is based on the recognition that the moraine is built on a high-relief, erosional surface (unconformity) consisting of drumlin uplands and a network of deep, steep-walled, interconnected valleys (tunnel channels). The development...
Image
Glacial landforms, flow sets and exposure ages. (1) Mega-scale glacial line...
Published: 07 September 2016
Fig. 9. Glacial landforms, flow sets and exposure ages. (1) Mega-scale glacial lineation; (2) crag and tail; (3) meltwater channel; (4) drumlin; (5) major offshore moraine; (6) minor offshore moraine; (7) former ice margin position on land; (8) zone of low glacial erosion in southern Caithness
Journal Article
Published: 01 February 2016
Canadian Journal of Earth Sciences (2016) 53 (3): 281–303.
... Till has traditionally been inferred to represent a late, climatically induced readvance of grounded ice from Lake Ontario basin, which deposited drumlinized till. Halton sedimentary architecture and facies are interpreted as deposition in an ice-marginal or subglacial lake bounded by Niagara...
FIGURES | View All (5)
Journal Article
Published: 10 August 2016
Canadian Journal of Earth Sciences (2017) 54 (1): 52–75.
... margins inferred from the distribution of moraines, drumlins, and meltwater features. Cordilleran (blue, yellow, brown) and Laurentide erratics (red, pink) distinguished by U/Pb isotopic ages (in millions of years), mineral composition, and geochemistry (unpublished data). (B) Meltwater spillways...
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