An anticlinal echelon fold comprises 2 anticlines and a shared syncline arranged en echelon. A synclinal echelon fold comprises 2 synclines and a shared anticline arranged en echelon. A pod fold is one occurring on and confined to the flank of a syncline or anticline. Echelon and pod folds are the basic fold forms. Both echelon and pod folds occur in the Roan Antelope deposit, Northern Rhodesia, Africa. The Birthday anticline, Birthday Gift mine, Burbanks, consists of 2 linked anticlinal echelon folds. Exception to certain of J. D. Campbell's statements and conclusions is taken and examples given to illustrate why.

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