Results 161 to 170 of about 677 (192)

Clast fabric of diamictons associated with some roches moutonnées

Boreas, 1990
Clast fabric patterns in thin, dense, over‐consolidated diamictons overlying and abutting the stoss sides of 23 Canadian and Swedish roches moutonnées were investigated. These diamictons display sedimentary characteristics that are commonly regarded as typical of basally‐deposited tills formed under actively flowing ice.
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A method of sampling clast-rich laminated diamictons for magnetic analyses

Canadian Journal of Earth Sciences, 1989
The sampling of nonlithified diamictons for magnetic analyses (anisotropy of magnetic susceptibility and paleomagnetic remanence) has been restricted to samples that are either massive, clay-rich sediments, or fine-grained ones with very low pebble contents.
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Brecciated diamictons from Mohawk Bay, S. Ontario, Canada

Sedimentology, 1990
ABSTRACTExamination of sediments along the north shore of Lake Erie at Mohawk Bay reveals a relationship between the formation of intensely brecciated diamictons and the presence of sand‐block intraclasts. It is postulated that the sand blocks were subglacially deposited within a meltwater environment, and later frozen prior to being eroded and ...
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Characterization of diamictons on the basis of their mineral magnetic properties in Murchisonfjorden, Nordaustlandet, Svalbard

Sedimentary Geology, 2011
Abstract Different grain-size fractions of 12 lithologically defined and 2 non-defined Weichselian glacial stage diamicton units from Nordaustlandet, Svalbard were studied for their mineral magnetic properties. The applied measurements included magnetic susceptibility (χ), anhysteretic remanent magnetization (ARM), saturation isothermal remanent ...
A.E.K. Ojala, F. Kubischta, A. Kaakinen, V.-P. Salonen   +3 more
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A comparison of mineral magnetic, geochemical and mineralogical techniques for compositional studies of glacial diamictons

Boreas, 1996
Data from heavy mineral analysis, X‐ray fluorescence spectrometry (XRF) and X‐ray diffractrometry (XRD) are compared with those obtained from mineral magnetic analysis for a range of glacial diamicton samples taken from the Quaternary sequence in the Isle of Man. These data show that the mineral magnetic approach offers a useful means of characterizing
JOHN WALDEN, JOHN P. SMITH, ROGER V. DACKOMBE   +2 more
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Distinction Between Tills and Other Diamictons Based on Textural Characteristics

SEPM Journal of Sedimentary Research, 1968
ABSTRACT Statistical parameters of the granule-to-clay size-frequency distribution efficiently differentiate till from alluvial-fan deposits and from outwash deposits. Discriminant functions utilizing mean, standard deviation, skewness, and kurtosis also separate the three types of sediment.
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Soft-sediment striated surfaces and massive diamicton facies produced by floating ice

1994
Abstract Soft-sediment striated surfaces, commonly associated with massive diamictites, have been described from many pre-Quaternary glacial sedimentary sequences around the world. A number of authors interpret these associations as evidence for a subglacial origin. However, soft-sediment striated surfaces are formed by the mechanical scouring action
C.M.T. Woodworth-Lynas, J.A. Dowdeswell
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Magnetic and pebble fabrics of glaciomarine diamictons in the Champlain Sea, Ontario, Canada

Canadian Journal of Earth Sciences, 1985
Glaciomarine diamicton(ite)s that contain articulated unbroken shell remains are usually assumed to have been deposited by the settling out of suspended mud with additions of coarse clasts derived from the melting of debris-laden floating ice. However, little is known about the magnetic and pebble fabrics of these composite sediments, and the purpose ...
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Lacustrine ostracodes in the Late Pleistocene Sunnybrook diamicton of southern Ontario, Canada: Discussion

Canadian Journal of Earth Sciences, 1988
It was with great interest that I read the recent article by Westgate, Chen, and Delorme reporting on the discovery of ostracode fossils in the Sunnybrook diamicton in the MetroToronto region of southern Ontario. I have followed the ongoing controversy surrounding the interpretations of the depositional origin of the sediments in the Metro-Toronto area,
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diamictonic, adj. & n.

2023
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