Results 151 to 160 of about 1,129 (194)
Palaeogeography, Palaeoclimatology, PalaeoecologyThe Lower Devonian Talacasto Formation in western Argentina records deposition in wave-dominated shallow-marine environments. This unit comprises a large-scale progradational succession, transitioning from black, parallel-laminated mudstone in the lower ...
M Gabriela Mangano +2 more
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Expanding the Ichnofacies Model to Tidal Straits: Testing Predictions and Assessing Anomalies
Terra NovaABSTRACT Trace fossils are instrumental in facies analysis, but some depositional environments remain underexplored. Cenozoic deposits in Italy have been studied to evaluate the ichnology of tidal straits. These comprise four zones: (1) strait centre, (2) dune‐bedded strait zone, (3) strait end and (4) strait margin.
M Gabriela Mangano +2 more
exaly +2 more sources
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Departures from the archetypal deltaic ichnofacies
Geological Society, London, Special Publications, 2022Abstract Recent work has focused on erecting new Seilacherian ichnofacies for depositional environments subject to recurring temporal and spatial variations in physico-chemical stress. In marine deltaic settings, these correspond to the Phycosiphon Ichnofacies for mudstone-dominated prodeltaic deposits and
James A. MacEachern, Kerrie L. Bann
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Geological Society, London, Special Publications, 2006
Abstract Three fundamental terms in ichnology are: (1) assemblage, which is equivalent to an assemblage of body fossils; (2) ichnocoenosis, which is a trace fossil assemblage produced by a biological community
Adrian P. Hunt, Spencer G. Lucas
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Abstract Three fundamental terms in ichnology are: (1) assemblage, which is equivalent to an assemblage of body fossils; (2) ichnocoenosis, which is a trace fossil assemblage produced by a biological community
Adrian P. Hunt, Spencer G. Lucas
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2007
Abstract The ichnofacies paradigm endures as the elegant, unifying framework within which accurate ichnological observations and their reliable environmental interpretations can be derived from the rock record. These recurring, strongly facies-controlled groupings of trace fossils, reflecting specific combinations of organism behavior
James A. MacEachern +3 more
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Abstract The ichnofacies paradigm endures as the elegant, unifying framework within which accurate ichnological observations and their reliable environmental interpretations can be derived from the rock record. These recurring, strongly facies-controlled groupings of trace fossils, reflecting specific combinations of organism behavior
James A. MacEachern +3 more
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Two New, Substrate-Controlled Nonmarine Ichnofacies
Ichnos, 2016ABSTRACTSubstantial ichnocoenoses of ichnofossil assemblages in nonmarine environments can be grouped into two, substrate-controlled ichnofacies. These are traces in plant tissues (mostly wood and leaves) and in bone. Plant tissues and bones provide distinctive, “hardground” substrates that are colonized and/or utilized in the nonmarine realm by a ...
Spencer Lucas
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Ichnofacies: a mixture of taphofacies and biofacies
Lethaia, 1991The environmental significance of individual ichnofacies has become a point of debate, and the Scoyenia ichnofacies is not clearly defined. Removal of the marine/non-marine boundary from ichnofacies definitions, as well as the bathymetry control, would render the Scoyenia ichnofacies unnecessary and would consolidate the definitions of the remaining ...
Bromley, Granville Richard +1 more
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Ichnofacies and bathymetry: a passive relationship
Journal of Paleontology, 1990Ichnofacies stand today as one of the more elegant but widely misunderstood concepts in ichnology, especially where paleobathymetry is concerned. Marine ichnofacies arenotintended to be paleobathometers, as some workers continue to imply (e.g., Lockley et al., 1987; Ekdale, 1988); rather, they are archetypical facies models based upon recurring ...
Robert W. Frey +2 more
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Ichnofacies of a Wave-Dominated Shoreline
1992Abstract The Upper Cretaceous sediments of the Blackhawk Formation of the Mesa Verde Group are interpreted as a complex of wave-dominated, prograding, siliciclastic shoreline parasequences. The Spring Canyon Member, of the Blackhawk Formation is representative of the shoreline deposits and was preserved in core of the Exxon Production
S. George Pemberton +2 more
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The Glossifungites Ichnofacies
1985Abstract The Glossifungitesichnofacies, albeit areally restricted, constitutes a distinct intermediary between freely shifting, particulate substrates of the Skolithosichnofacies and fully consolidated substrates of the Trypanitesichnofacies. All three typically occur within, but are not restricted to, littoral to shallow sublittoral,
S. George Pemberton, Robert W. Frey
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