Gypsum an overview | ScienceDirect Topics
Gypsum nodules are probably formed by gypsum precipitation from a single point and can be polyphasic. Processes of dissolutionprecipitation affecting a gypsic parent material can also produce nodules. The constituent crystals of nodules show a variety of fabrics, but a lenticular hypidiotopic fabric is most widespread (Fig. 8).Buck and Van Hoesen (2002) describe small round aggregates ...