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This study investigates the sulphur source of gypsum sulphate and dissolved groundwater sulphate in the Central Namib Desert, home to one of Africa's most extensive gypsum (CaSO 4 .2H 2 O) accumulations. It investigates previously suggested sulphate precursors such as bedrock sulphides and decompositional marine biogenic H 2 S and studies the importance of other potential sources...
In this work, the importance of groundwater in the formation and evolution of evaporitic lacustrine facies in the Iberian Chain and Ebro Basin contact (Spain) is studied. There are outcrops of geological materials from Palaeozoic to Quaternary times. These materials have been classified into eight hydrostratigraphic units. The Jurassic `carniolas' and limestones in the Iberian Chain (HU 4 and 5) are...
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