Fig. 3From: Preserved organic matter in a fossil Ocean Continent Transition in the Alps: the example of Totalp, SE SwitzerlandThe sulphide bearing outcrop in the Totalp area showing weathered lithology. Red circles are the sampling location in this outcrop. In the line-drawing on the right, light red identifies radiolarian cherts, dark red siliceous shale and yellow sulphate rich carbonate, rich in silica. a Zoom of outcrop. b Sample 65 is composed by calcite 50%. 25% quartz and is highly weathered. c Sample shows visible hematite crystals and calcite as the major mineral. d Sample 60 shows a siliceous rock with 3 different colours composed by 83% quartz, 10% albite and pyrite, illite and chloriteBack to article page