caa a22 4500 467934169 CHVBK 20180406152952.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s10347-005-0035-z doi (NATIONALLICENCE)springer-10.1007/s10347-005-0035-z Hydrodynamic behaviour of Nummulites [Elektronische Daten] implications for depositional models [Stéphan Jorry, Claude-Alain Hasler, Eric Davaud] Large benthic foraminifers are considered to be good indicators of shallow marine carbonate environments in fossil series. Over the last 50 years, the palaeoenvironment of Tertiary Nummulites accumulations has been a matter of debate, particularly because of difficulties in interpreting these deposits, and in this way, the absence of analogues in present-day seas does not help. The aim of this paper is to insight the different ways Nummulites tests and clasts may accumulate according to their hydrodynamic behaviour. Based on experimental measurements and on SEM observations, it appears that the high primary skeletal porosity of Nummulites made them easily transportable. The calculated threshold shear velocities confirm that large-sized Nummulites can be moved by weak wave-driven currents. This peculiar hydrodynamic behaviour of Nummulites could explain the diversity of depositional models. Depending on local hydrodynamic conditions, autochthonous Nummulites deposits can be preserved as in situ winnowed bioaccumulations or be accumulated offshore, onshore or alongshore, away from the original biotope. Springer-Verlag, 2005 Carbonates nationallicence Eocene nationallicence Large benthic foraminifera nationallicence Test density nationallicence Taphocoenosis nationallicence Jorry Stéphan Department of Geology, University of Geneva, 13 rue des Maraîchers, 1205, Geneva, Switzerland aut Hasler Claude-Alain Department of Earth Sciences, University of Cambridge, Downing Street, CB2 3EQ, Cambridge, UK aut Davaud Eric Department of Geology, University of Geneva, 13 rue des Maraîchers, 1205, Geneva, Switzerland aut Facies Springer-Verlag 52/2(2006-05-01), 221-235 0172-9179 52:2<221 2006 52 10347 https://doi.org/10.1007/s10347-005-0035-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10347-005-0035-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jorry Stéphan Department of Geology, University of Geneva, 13 rue des Maraîchers, 1205, Geneva, Switzerland aut NATIONALLICENCE 700 1- Hasler Claude-Alain Department of Earth Sciences, University of Cambridge, Downing Street, CB2 3EQ, Cambridge, UK aut NATIONALLICENCE 700 1- Davaud Eric Department of Geology, University of Geneva, 13 rue des Maraîchers, 1205, Geneva, Switzerland aut NATIONALLICENCE 773 0- Facies Springer-Verlag 52/2(2006-05-01), 221-235 0172-9179 52:2<221 2006 52 10347 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 239361792 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer