Hanken, N.-M., Bjørlykke, K. & Nielsen, J.K. (2015). In: K. Bjørlykke (ed.), Petroleum Geoscience: From Sedimentary Environments to Rock Physics. Springer-Verlag Berlin Heidelberg. Chapter 5, page 151-216. 2nd Edition.
Clasts of laminated sediment have been found inside a rare occurrence of fossil gas blowout pipes penetrating Plio-Pleistocene marine sediments exposed along the northeast coast of the island of Rhodos (Greece). Anisotropy of magnetic...
moreClasts of laminated sediment have been found inside a rare occurrence of fossil gas blowout pipes penetrating Plio-Pleistocene marine sediments exposed along the northeast coast of the island of Rhodos (Greece). Anisotropy of magnetic susceptibility characteristics of the clasts are comparable to the stratigraphically higher source rock, indicating that erosion, transportation and deposition of the clast material did not cause
The late Sandbian to the early Katian (Late Ordovician) in southeastern Norway is dominated by marine mudstones that contain an exceptional spectrum of macrofauna and trace element geochemistry, recording both abrupt and gradual faunal...
moreThe late Sandbian to the early Katian (Late Ordovician) in southeastern Norway is dominated by marine mudstones that contain an exceptional spectrum of macrofauna and trace element geochemistry, recording both abrupt and gradual faunal changes during major sea-level and environmental shifts. This study investigates the relationships between sea-level changes and their influence on the source of clastic material, oxygen levels
... Sea region. Ages are quoted as first published except for those given by Donner et al. (1977), which were corrected to a δ 13 C = −25% PDB (Pee Dee Belemnite standard) using the formula provided by Stuiver et al. (2005). All ...
... Journal of Paleontology, 48: 952-962. Gibbons, GS 1967. Shell content in quartzose beach and dune sands, Dee Why, New South Wales. Journal of Sedimentary Petrology, 37: 869-878. ... Palaios, 14: 352-374. Page 14. 130 NILS-MARTIN...
more... Journal of Paleontology, 48: 952-962. Gibbons, GS 1967. Shell content in quartzose beach and dune sands, Dee Why, New South Wales. Journal of Sedimentary Petrology, 37: 869-878. ... Palaios, 14: 352-374. Page 14. 130 NILS-MARTIN HANKEN et al. Goldring, R. 1964. ...
The Dividal Group of northern Norway includes both Vendian and Lower Cambrian sequences. Trace fossil assemblages in the Lower Cambrian part of the group generally indicate endobenthic communities dominated by deposit‐feeding animals. At...
moreThe Dividal Group of northern Norway includes both Vendian and Lower Cambrian sequences. Trace fossil assemblages in the Lower Cambrian part of the group generally indicate endobenthic communities dominated by deposit‐feeding animals. At one level, however, an unusual succession of trace fossils occurs that includes Diplocraterion parallelum and a conical, branching shaft herewith named Altichnus foeyni. Both forms show features
Hanken, N-M and Nielsen, JK (2013). Upper Carboniferous–Lower Permian Palaeoaplysina build-ups on Svalbard: the influence of climate, salinity and sea-level. In: Ga̜siewicz, A. & Słowakiewicz, M. (eds). Palaeozoic Climate Cycles: Their...
moreHanken, N-M and Nielsen, JK (2013). Upper Carboniferous–Lower Permian Palaeoaplysina build-ups on Svalbard: the influence of climate, salinity and sea-level. In: Ga̜siewicz, A. & Słowakiewicz, M. (eds). Palaeozoic Climate Cycles: Their Evolutionary and Sedimentological Impact. Geological Society, London, Special Publications, 376: 269-305.
http://dx.doi.org/10.1144/SP376.17.
Abstract:
Upper Carboniferous–Lower Permian Palaeoaplysina build-ups on Svalbard developed on a partly restricted marine warm-water carbonate platform at low palaeo-latitudes. The Palaeoaplysina build-ups mostly have a flat-topped tabular geometry, representing the mature stage of build-up growth. With decreasing accommodation space, continued vertical growth was hampered and lateral growth became dominant. The tabular growth form of the build-ups is probably a result of lateral amalgamation of several minor mounds. In central Spitsbergen many of the tabular build-ups form parts of continuous ridges or ring-shaped to polygonal build-up complexes encircling a lagoon. Lateral interfingering between bedded fusulinid dolostones along the build-up margins and barren dolostones further out in the lagoon may indicate increasing salinity from the lagoon margin to the central part. These lateral facies changes are often associated with evaporites (gypsum) and low biodiversity, especially abundant euryhaline fusulinids or even barren beds. On the sea side of the Palaeoaplysina build-ups, the frequent renewal of normal saline seawater allowed the highest biodiversity (e.g. stenohaline crinoids). The uppermost part of some build-ups contain Microcodium, indicating intermittent subaerial exposure and vegetation cover during lowstand, probably caused by eustatic sea-level changes and/or local tectonics. The biota of the build-ups and their lateral sediments is typical for a shallow marine chloroforam association, indicating a tropical climate during deposition.
... Get PDF (1974K). Keywords: Rhodes; Greece; Plio-Pleistocene; stratigraphy; carbonate sediments; basin analysis; sea-level change; coastal geomorphology. Abstract. The stratigraphy of marine Plio-Pleistocene sediments from ...
The end−Permian mass extinction constituted a major event in the history of crinoids. It led to the demise of the major Paleozoic crinoid groups including cladids, disparids, flexibles and camerates. It is widely accepted that a single...
moreThe end−Permian mass extinction constituted a major event in the history of crinoids. It led to the demise of the major Paleozoic crinoid groups including cladids, disparids, flexibles and camerates. It is widely accepted that a single lineage, derived from a late Paleozoic cladid ancestor (Ampelocrinidae), survived this mass extinction. Holocrinid crinoids (Holocrinus, Holocrinida) along with recently described genus Baudicrinus (Encrinida), the only crinoid groups known from the Early Triassic, are considered the stem groups for the post−Paleozoic monophyletic subclass Articulata. Here, we report preliminary data on unexpectedly diverse crinoid faunas comprising at least four orders from the Lower Triassic (Induan and Olenekian) of Svalbard, extending their stratigraphic ranges deeper into the early Mesozoic. These findings strongly imply that the recovery of crinoids in the aftermath of the end−Permian extinction began much earlier at higher palaeolatitudes than in the central Tethys.
