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Palaeozoic microfossils from Orphan Knoll, NW Atlantic Ocean Naturalis
Hinte, J.E. van; Ruffman, A.; Boogaard, M. van den; Jansonius, J.; Kempen, T.M.G. van; Melchin, M.J.; Miller, T.H..
Orphan Knoll is an isolated, drowned continental fragment 550 km northeast of Newfoundland. The top of Orphan Knoll stands at 1800 to 2000 m and is marked by a series of protruding mounds. Dredging at the base of one of the mounds in 1971 obtained a suite of fossiliferous limestone pebbles that are interpreted to reflect nearby bedrock. The shallow marine limestone facies include mudstone, wackestone, packstone, and grainstone. The pebbles yielded Late Ordovician, Silurian and Devonian conodonts, as well as Ordovician/Silurian scolecodonts, chitinozoans and graptolites. Similarly, sponge spicules suggest the presence of Late Ordovician as well as Middle Devonian material including a Silicunculus-type of hexactinellid anchoring basalia and an octactine...
Tipo: Article / Letter to the editor Palavras-chave: 38.20.
Ano: 1995 URL: http://www.repository.naturalis.nl/record/317524
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Larger benthic foraminifera and their distribution patterns on the Spermonde shelf, South Sulawesi Naturalis
Renema, W.; Hoeksema, B.W.; Hinte, J.E. van.
A systematic description of the distributional pattern of 20 species of larger benthic foraminifera on the Spermonde Archipelago and their relation with environmental parameters is presented. Around 13 islands transects at the exposed and leeward slope were sampled. Apart from parameters like substrate type, hydrodynamic energy and light intensity (directly related to depth) also nutrient availability and environmental stabiltity determine the distribution over the shelf. Some of the species, and especially the calcarinids, are less specialised to some of these parameters than in other areas. Elphidium craticulatum, showing chloroplast husbandry, is an important fauna component.
Tipo: Article / Letter to the editor Palavras-chave: Benthic foraminifera; Spermonde Archipelago; Sulawesi; Distribution; Ecology; 42.79.
Ano: 2001 URL: http://www.repository.naturalis.nl/record/219452
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