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Title: Bioerosion of Lower Ordovician Hardgrounds in Southern Scandinavia and Western North America.
Author: Ekdale, Allan A. (Allan Anton), 1946-
Benner, J.S.
Bromley, R. G. (Richard Granville)
Gibert Atienza, Jordi Maria de
Keywords: Invertebrats fòssils
Fossil invertebrates
Issue Date: 2002
Publisher: Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA)
Abstract: Trace fossils produced by macroboring invertebrates can be found in carbonate hardgrounds of early Ordovician age in southern Sweden, southern Norway and western Utah (U.S.A.). The bioeroded rocks are highly fossiliferous, thinly bedded, shallow-marine li-mestones. The macroborings in each of the three localities are vase-shaped cavities with diameters and lengths ranging from one to a few centimeters. At least some of the Swedish specimens apparently belong to the ichnogenus Gastrochaenolites LEYMERIE. These bioerosion trace fossils appear to be the oldest macroborings in carbonate hardgrounds, and they indicate that the macroboring niche was firmly established in shallow-marine carbonate shelf environments at least by Arenig time in the Ordovician Period.
Note: Reproducció del document publicat a:
It is part of: Acta Geologica Hispanica, 2002, vol. 37, num. 1, p. 9-13
ISSN: 0567-7505
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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