Weathering of glauconite in an alkaline environment - A case study from Krakow area, Poland

In the studied profile glauconite underwent dissolution. Si and Mg were leached out with weathering solution while due to alkaline pH Fe3+ crystallized in situ in form of goethite having likely substitutions of Al. Neoformation of smectite-rich mixed layered mica-smectite minerals from the solution was also likely to take place.