Vagner Formation

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Series: AAPG Memoir
Published: 01 January 1985
DOI: 10.1306/M39449C10
EISBN: 9781629811505
... in the formation of a large trough which was then filled with clastic sediments of Upper Cretaceous age. A second erosional cycle at the end of the Cretaceous period created a second, younger canyon which was subsequently filled with terrigenous Tertiary sediments. The tectonic activity which controlled...
Journal Article
Journal: AAPG Bulletin
Published: 01 August 2016
AAPG Bulletin (2016) 100 (8): 1329-1375.
... where sedimentation was strongly influenced by tidal currents but with significant river influence and minor wave action, except in exposed distal locations. The shallowing-upward, deltaic Tilje succession was deposited near the lowstand shoreline. The Tilje Formation consists of two tabular second...
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Journal Article
Published: 01 February 2016
Canadian Journal of Earth Sciences (2016) 53 (3): 281-303.
... fill basin lows and drape ORM sediment lobes and Newmarket Till drumlins. These distinct sedimentary units are here informally referred to as Halton formation. Formal Halton Till is a proposed subunit of Halton formation, a clay-rich diamicton mapped from Niagara Peninsula to ORM and eastward. Halton...
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Series: Geological Society, London, Engineering Geology Special Publications
Published: 01 January 2017
DOI: 10.1144/EGSP28.4
EISBN: 9781786203038
... in an attempt to translate sediment–landform assemblages into a format that has practicability in engineering geology. In this respect the regional distribution of landsystems resonates to some degree with the classification schemes of ‘glaciogenic subgroups’ and ‘till formation domains’. Beyond the glaciogenic...
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Journal Article
Published: 01 November 1977
Quarterly Journal of Engineering Geology and Hydrogeology (1977) 10 (4): 389-410.
... on their modes of formation, transportation and deposition has been developed. To accommodate the inherent variability of tills, sub-division of these classifications has been carried out on the basis of their gradational characteristics. Further, the fabric features contributing to variability in engineering...
Journal Article
Published: 03 June 2013
Canadian Journal of Earth Sciences (2013) 50 (8): 847-855.
... be distributed in three-dimensional dispersal trains or plumes. Developments in our understanding of glacial erosion, entrainment, and deposition over the past two or three decades help clarify formation of these plumes. Much of the debris in the basal ice of ice sheets is likely incorporated at places where...
Journal Article
Published: 15 November 2005
Canadian Journal of Earth Sciences (2005) 42 (9): 1601-1613.
... of the diabase provides a number of insights into the nature of glacial erosion of bedrock and the generation of heavy-mineral dispersal trains. Bedrock erosion and entrainment rates at the time of pigeonite dispersal train formation were high (3–14 mm·a –1 ), suggesting that bedrock erosion was rapid yet...
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Journal Article
Published: 01 October 2005
Petroleum Geoscience (2005) 11 (4): 331-337.
... that the craters were generated by gas expulsion from melted gas hydrates, combined with melt-water expulsion and erosion. This is supported by: (1) a similarity with published seafloor craters that originate from melted gas hydrates; (2) appropriate physical conditions for the formation and melting of gas...
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Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 671-680.
... play a role in the formation or crystallization of microcrystalline quartz. The present IR application offers a new method to estimate the moganite content in microcrystalline silica varieties. Quartz shows a varied distribution and high abundance in the Earth’s rocks. Hence, a better understanding...
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Journal Article
Published: 01 June 2017
American Mineralogist (2017) 102 (6): 1311-1327.
... environment at elevated differential stress, strain rate and temperature. Several grains, in which PDBs are observed, were analyzed with ion microprobe. Ion maps indicate redistribution of radiogenic Pb isotopes associated with PDB formation. Isotopic redistribution preferably occurs in PDBs with larger...
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Journal Article
Published: 01 August 1976
Quarterly Journal of Engineering Geology and Hydrogeology (1976) 9 (3): 159-194.
..., Crowthorne. Dowling, J. W. F. & Beavan, P. J. 1969 . Terrain evaluation for road engineers in developing countries. Journal of the Institute of Highway Engineers . Dreimanis, J. A. & Vagners, U. J. 1971 . Bimodal distribution of rock and mineral fragments...
Journal Article
Published: 22 July 2014
Canadian Journal of Earth Sciences (2014) 51 (9): 837-849.
..., and core samples were collected for analyses. The surface deposits were mapped by the Ontario Division of Mines as part of the mapping projects of the St. Marys and Lucan map sheets ( Sado and Vagners 1975 ; Karrow 1977 ). The orientation of striae and erosional grooves was measured on the limestone...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2002
GSA Bulletin (2002) 114 (5): 528-532.
... in combination ( Krüger and Kjaer, 1999 ). Such techniques include (1) compositional analysis (mineral and microfossils) (e.g., Dreimanis and Vagners, 1971, 1972 ; Tulaczyk et al., 1998 ), (2) studies of the evolution of grain-size modes ( Haldorsen, 1983 ), (3) deconvolution of grain-size curves...
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Journal Article
Published: 01 May 2001
Geochemistry: Exploration, Environment, Analysis (2001) 1 (2): 163-173.
... dispersal train. The train extends tens of kilometres southeastward into crystalline terrain outside the Basin. The prominence of the train reflects preferential glacial erosion of Pitz and Thelon formations. The formations are relatively soft and, in proportion to their areal extent, have contributed...
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Journal Article
Journal: GSA Bulletin
Published: 01 October 2000
GSA Bulletin (2000) 112 (10): 1475-1495.
... abundant magnetite, feldspars, pyroxenes, and amphiboles ( Dreimanis and Vagners, 1971 ; Gwyn and Dreimanis, 1979 ). In contrast, glacial sediments derived from mature sedimentary rocks of the Paleozoic platform in the central Midwest tend to be finer textured (silty and clayey) and are enriched...
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Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.185.01.11
EISBN: 9781862394339
... ). The glacier base, called the traction zone or ‘glacial mill’, produces fine-grained material by abrasion and crushing with ‘terminal grades’ in the silt sizes ( Dreimanis & Vagners 1971 ). Some of the finer material can also be inherited from older tills or regolith. The ‘grain-size effect’ may...
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Journal Article
Published: 01 June 2012
Journal of Sedimentary Research (2012) 82 (6): 400-421.
... from the base of the A1 reservoir interval; (28) marine shelf, pebbly, glaucony-bearing sandstone in the A1 reservoir interval; (29 and 30) shale-dominated, upward-coarsening successions transitional into the overlying thick Telisa Formation shale. 28 2 2011 26 1 2011 SEPM...
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Journal Article
Published: 01 September 2006
Journal of Sedimentary Research (2006) 76 (9): 1093-1105.
... display remarkable similarities in size and scale with moribund sand ridges in the East China Sea shelf ( Yang and Sun 1988 ), suggesting that local sea-level rise has played an important role in the formation of sand ridges. Recent studies also suggested that the shelf sand ridges in the eastern Yellow...
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Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.185.01.01
EISBN: 9781862394339
... from their source (e.g. Boulton et al. 1985 ; Fisher et al. 1985 ; Clark 1987 ; Prest 1990 ). The intensity of subglacial processes, and hence the formation of till and glacial dispersal trains, relates to subglacial ice flow velocity, temperature, and water, as well as to the mechanical...
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Journal Article
Published: 01 December 2014
Journal of Environmental and Engineering Geophysics (2014) 19 (4): 207-228.
...., 1995 ; Smith and Jol, 1995 ), while greater depths have been recorded in desert sands near 30 MHz ( Francke, 2012 ) and in frozen formations at 40–50 MHz ( Arcone et al., 1998 ; Arcone et al., 2002). In random media, GPR profiles have been discussed for low permittivity tuff ( Grimm et al., 2006...
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