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Université de Fribourg

Faunal evidence of a holocene pluvial phase in southern Arabia with remarks on the morphological variability of Helenina anderseni

Gennari, Giordana ; Rosenberg, Thomas ; Spezzaferri, Silvia ; Berger, Jean-Pierre ; Fleitmann, Dominik ; Preusser, Frank ; Al-Shanti, Mahmoud ; Matter, Albert

In: The Journal of Foraminiferal Research, 2011, vol. 41, no. 3, p. 248-259

Although foraminifera have been found living in inland saline lakes isolated from the sea, this phenomenon has rarely been recognized in the fossil record. This study documents the occurrence of benthic foraminifera in Holocene lake sediments located nearly 500 km inland from the Red Sea, in the Al-Mundafan region of southern Saudi Arabia. The lake formed during a regional pluvial period,...

Université de Fribourg

Growth and demise of cold-water coral ecosystems on mud volcanoes in the West Alboran Sea: the messages from the planktonic and benthic foraminifera

Margreth, S. ; Rüggeberg, A. ; Comas, M.C. ; Pinheiro, L.M. ; Spezzaferri, Silvia

In: Marine Geology, 2011, vol. 282, no. 1-2, p. 26-39

The Dhaka and Maya mud volcanoes (MVs), located in the Mud Diapir Province in the Western Alboran Basin along the Moroccan Coasts, were cored during the TTR-17, Leg 1 cruise. Cores were taken on the top of the volcanoes at a water depth of 370 m on the Dhaka MV (core TTR17-MS411G) and at 410 m water depth on the Maya MV (core TTR17-MS419G), respectively. On both mud volcanoes the extruded mud...

Bibliothèque cantonale jurassienne

Trace fossils from marginal lacustrine deposits of the Cretaceous Jinju Formation, southern coast of Korea

Kim, Jeong Yul

In: Palaeogeography, palaeoclimatology, palaeoecology : an international journal for the geo-sciences, 2005, vol. 218, p. 105

Bibliothèque cantonale jurassienne

Estimation of environmental paleogradient values based on presence/absence data : a case study using benthic foraminifera for paleodepth estimation

Hohenegger, Johann

In: Palaeogeography, palaeoclimatology, palaeoecology : an international journal for the geo-sciences, 2005, vol. 217, p. 115

Bibliothèque cantonale jurassienne

Characterization of depositional environments in isolated carbonate platforms based on benthic foraminifera, Belize, Central America

Gischler, Eberhard

In: Palaios : international journal of the Society of Economic Paleontologists and Mineralogists, 2003, vol. 18, p. 236

Université de Fribourg

High-frequency palaeoenvironmental changes in mixed carbonate-siliciclastic sedimentary systems (Late Oxfordian, Switzerland, France, and southern Germany)

Védrine, Stéphanie ; Strasser, André (Dir.)

Thèse de doctorat : Université de Fribourg, 2007 ; no 1579.

The main goal of this study is to monitor the highfrequency palaeoenvironmental changes occurring during a marine transgression in mixed carbonatesiliciclastic sedimentary systems. Based on a wellestablished bio- and sequence-stratigraphic framework, a narrow time window in the Bimammatum Zone of the Late Oxfordian is investigated. Seven shallow platform sections (Swiss Jura, Lorraine), two deep...

Université de Fribourg

Miocene shallow-water limestones from São Nicolau (Cabo Verde): Caribbean-type benthic fauna and time constraints for volcanism

Bernoulli, Daniel ; Hottinger, Lukas ; Spezzaferri, Silvia ; Stille, Peter

In: Swiss Journal of Geosciences, 2007, vol. 100, no. 2, p. 215-225

Shallow-water limestones of presumed Late Cretaceous and Eocene age, interbedded with basaltic lavas, were described by earlier authors from São Nicolau in the northwestern part of the Cabo Verde archipelago. If confirmed, these ages would imply late Mesozoic shallow-marine and subaerial volcanic activity in the Cabo Verde archipelago, and document a geological history very different from that...

Université de Fribourg

Hyalinea marmarica, a new species of benthic foraminifera from the Sea of Marmara (Turkey)

Spezzaferri, Silvia ; Yanko-Hombach, Valentina

In: The Journal of Foraminiferal Research, 2007, vol. 37, no. 4, p. 309-317

Traditionally, the benthic foraminifera Hyalinea balthica (Schröter) has been considered a species with high intraspecific variability, possibly related to climatic changes, and, therefore, a potential indicator of paleoclimate in the Mediterranean Sea. However, a stable and characteristic morphology very different from the syntype of the species can be observed in specimens from the Sea...