“…Hy poth e ses con cern ing the gen e sis of berthierine are based on the source of iron. The po ten tial sources for the iron might be: weath er ing (see Young and Tay lor, 1989), vol ca nism (Dreesen, 1989;Kimberley, 1994;Sturesson et al, 2000;García-Frank et al, 2012) or hy dro ther mal pro cesses (Rivas-Sanchez et al, 2006). Some au thors think that berthierine is an early diagenetic min eral (e.g., Young, 1989;Tay lor and Curtis, 1995), and oth ers sug gest that one model of berthierine for ma tion does not nec es sar ily ex clude the other (e.g., Young, 1989;Reolid et al, 2008).…”