Consulta: subjectFacets:"38.23"
Registros recuperados: 3
Data/hora: 10/06/2024 13:38:54

Environment and quantitative morphology of some Silurian tabulates from Gotland
Provedor de dados: 16
Autores: Stel, J.H.
An outline is given of reef development in Gotland, Sweden, during the time when the Visby (Llandovery) and Högklint (Wenlock) Beds were deposited together with a sketch of the palaeoecology in the time during which the Hemse and Hamra-Sundre (Ludlow) Beds were formed. Variation is described in the tabulates Favosites hisingeri Edwards &amp; Haime, F. obliquus (Sokolov), F. gothlandicus Lamarck, F. forbesi Edwards &amp; Haime, Syringolites kunthianus (Lindström), and Alveolites suborbicularis Lamarck. In order to clarify ecophenotypic variation of corallite size in tabulates, the corallite area and three different corallite diameters were measured. Although the corallite area is more related to the shape of the organism that lived in a corallite,...
Tipo: Article / Letter to the editor
Palavras-chave: 38.23.
Ano: 1978
URL: http://www.repository.naturalis.nl/record/317485

Macrofauna associations and formation of shell concentrations in the Early Eocene Roda Formation (southern Pyrenees, Spain)
Provedor de dados: 16
Autores: Martinius, A.W.
The invertebrate macrofauna (mainly molluscs) of the Early Eocene Roda Formation (southern Pyrenees, Spain) is reported and classified in seven biofacies associations, representing ecologically related groups of macro-invertebrates of shallow marine fan-delta environments ranging in depth from intertidal mudflat to shallow carbonate shelf settings (maximum water depth c. 60 m). The most common association is indicative of mixed siliciclastic-carbonate substrates with the characteristics of an abandonment surface in shallow subtidal settings above wave base. The second most frequent biofacies association is found in subtidal normal marine outer-bay carbonate environments with a relatively low sedimentation rate. However, the most prominent associations,...
Tipo: Article / Letter to the editor
Palavras-chave: 38.23.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/317490

Amazonia through time: Andean uplift, climate change, landscape evolution and biodiversity
Provedor de dados: 16
Autores: Hoorn, C.; Wesselingh, F.P.; Steege, H. ter; Bermudez, M.A.; Mora, A.; Sevink, J.; Sanmartín, I.; Sanchez-Meseguer, A.; Anderson, C.L.; Figueiredo, J.P.; Jaramillo, C.; Riff, D.; Negri, F.R.; Hooghiemstra, H.; Lundberg, J.; Stadler, T.; Särkinen, T.; Antonelli, A.
The Amazonian rainforest is arguably the most species-rich terrestrial ecosystem in the world, yet the timing of the origin and  volutionary causes of this diversity are a matter of debate. We review the geologic and phylogenetic evidence from Amazonia and compare it with uplift records from the Andes. This uplift and its effect on regional climate fundamentally changed the Amazonian landscape by reconfiguring drainage patterns and creating a vast influx of sediments into the basin. On this “Andean” substrate, a region-wide edaphic mosaic developed that became extremely rich in species, particularly in Western Amazonia. We show that Andean uplift was crucial for the evolution of Amazonian landscapes and ecosystems, and that current biodiversity patterns...
Tipo: Article / Letter to the editor
Palavras-chave: Amazonia; Evolution; Biodiversity; 42.05; 42.21; 38.23.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/365034