1877 E. S. Dana 336 Dudleyite.—Alteration product of margarite.
1900 No. 165. 181 This alteration product appears somewhat like the iddingsite found in the Californian teschenite.
2007 A. Singer vi. 204/2 Underground alteration products of pyroclastics in the Golan Heights presumably formed in the past under shallow subaquatic conditions such as marshes.