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till

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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP461.8
EISBN: 9781786203427
... Abstract Is groundwater abundant in Antarctica and does it modulate ice flow? Answering this question matters because ice streams flow by gliding over a wet substrate of till. Water fed to ice-stream beds thus influences ice-sheet dynamics and, potentially, sea-level rise. It is recognized...
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Series: GSA Field Guide
Published: 01 January 2016
DOI: 10.1130/2016.0043(05)
EISBN: 9780813756431
... moraine is present and is characterized by sandy till. No valid information that substantiates glacial activity exists west of the city of Baraboo. The Driftless Area includes a site of the earliest Wisconsin habitation. After the major hiatus of hundreds of million years between the Early Ordovician...
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Journal Article
Published: 01 November 2014
Environmental and Engineering Geoscience (2014) 20 (4): 405.
Series: GSA Field Guide
Published: 01 January 2014
DOI: 10.1130/2014.0037(09)
EISBN: 9780813756370
... inhabitants is founded on glacial moraines, sub-glacial till, and outwash deposited during the last glaciation. Floods released from glacially dammed lakes and a landslide-dammed lake punctuate this record. The glacial geologic reconstruction was evaluated by calculation of basal shear stress, and yielded...
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Series: GSA Field Guide
Published: 01 January 2014
DOI: 10.1130/2014.0036(02)
EISBN: 9780813756363
... Quarry, which exposes the type Nebraskan till. Additionally we will examine core samples of the Kennard Formation, a new stratigraphic unit consisting of multiple pre-Illinoian loesses. We also present recent results on the pre-Illinoian till stratigraphy in the Missouri River valley region. A variety...
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Series: GSA Field Guide
Published: 01 January 2014
DOI: 10.1130/2014.0038(06)
EISBN: 9780813756387
... segments), the trends of stone-lee ends (line segments extending from the circumference of the circle), and poles to planes of glacigenic tension fractures and shear structures in Kamloops Lake till and subtill sediments, and glacigenic incipient shear structures in magnetically reversed indurated sand...
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Series: GSA Field Guide
Published: 01 January 2013
DOI: 10.1130/2013.0031(06)
EISBN: 9780813756318
.... ABSTRACT The Great Lakes coast contains numerous unstable bluffs underlain by heterogeneous glacial materials consisting of till, sand, and gravel layers, and lacustrine clays. Many of the bluffs are steeper than their equilibrium angles and typically move as slow earth slides or occasional rapid slumps...
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Series: GSA Special Papers
Published: 01 May 2012
DOI: 10.1130/2012.2487(05)
... The particle size and provenance signature of glacial till from the Lonewolf Nunataks at the head of Byrd Glacier, Antarctica, show evidence of subglacial origin and therefore provide new information about ice-covered bedrock of East Antarctica. Particle-size data from ice-cored moraines...
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(14)
EISBN: 9780813756240
..., and laid down a finer-grained till due to incorporation of proglacial lake sediment. There are three distinct tills, which are correlated to three readvance phases: the St. Croix/Automba, Split Rock, and Nickerson. A red clay typically caps the stratigraphy at lower elevations in the basin. This clay may...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(16)
EISBN: 9780813756240
... defines and correlates these tills on the basis of their texture, lithologic composition, and stratigraphic position. Soils developed in this glacial landscape are among the most productive in the world. Their subtle variations reflect shifting ecotones throughout the Holocene. Figure 1. Portion...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0020(05)
EISBN: 9780813756202
... glacial Lake Watts (till on the west side of the interchange, bedrock on the east side). 5.7 46.9 Exit right to PA 108 (Slippery Rock exit) to stop sign, then turn left on PA 108 toward Slippery Rock. 0.9 47.8 Turn right onto West Park Rd. 0.3 48.1 Cross Slippery Rock Creek. This stream...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0020(05)
EISBN: 9780813756202
... The section also illustrates complex weathering patterns associated with jointing in the till and the effects of the sand beds on the adjacent till. The gorge is a Pleistocene drainage diversion. There is a suggestion ( D’Urso, 2000 ) that the formation of the gorge did not require glacial...
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