A phylogenetic comparison of microbial communities in hypersaline evaporites was conducted on crusts from Guerrero Negro, Mexico, and Lindsey Lake, New Mexico, using culture-independent rRNA gene sequence analysis. Many sequences were shared between evaporites, which suggests that similar environments select for specific microbial lineages from a global metacommunity.

An original and detailed study focusing the petrography of evaporites from the Late Aptian deposits exposed in the eastern and southern São Luís-Grajaú Basin is presented herein, with the attempt of distinguishing between primary and secondary evaporites, and reconstructing their post-depositional evolution. Seven evaporites phases were recognized: 1. chevron gypsum; 2. nodular to lensoidal gyp...

The new approach on depositional conditions of the Messinian evaporites in Zakynthos Island indicates that Kalamaki and Ag. Sostis areas were redeposited during Early Pliocene. They accumulated either as turbiditic or slumped blocks, a response to thrust activity. Thrust activity developed narrow restricted foreland basin with uplifted orogenic wedge consisting evaporites. These eroded submarin...

There is much interest on the occurrence of water and ice in the past history of Mars. Because landslides on Mars are much better conserved than their terrestrial counterparts, a physical examination and morphological analysis can reveal significant details on the depositional environment at the instant of failure. A study of the landslides in Valles Marineris based on their physical aspect is ...

This volume grew out of the various oral and poster presentations given during the ‘Evaporite’ session at the International Geological Union conference (2004) in Florence, Italy. It was clear that only a few of the participants or attendees, coming from many countries and various distant parts of the world, were well informed about evaporites outside their immediate area of study, apart from da...

This paper presents a new interpretation of the geometry of Triassic alignment of J. Sidi Mahdi –J. Zitoun in Medjerda Valley Plain (Northern Tunisia) based on detailed analysis of gravity and seismic reflection data. The main results of gravity analysis do not show a distinguish gravity anomaly over Triassic evaporites bodies. The positive gravity anomaly seems to be related to the entire stru...

Introduction: The discovery of substantial evaporite deposits at the Opportunity rover landing site in Meridiani Planum on Mars argues for significant interactions between liquid water and local rocks during some stage of the Martian past. However, evaporites can form under a dazzling variety of water/rock ratios, from long-term evaporation of expansive reservoirs to periodic recycling of water...