Todorokite in Manganese Nodules from a British Columbia Fjord

Abstract

CONCRETIONS of iron and manganese oxides and hydrous oxides—objects commonly called manganese nodules—are widely distributed not only on the deep-sea floor but also in shallow marine environments¹. Such concretions were not known to occur north of Cape Mendocino in the shallow water zones bordering the North-East Pacific Ocean until the summer of 1966 when they were recovered by one of us (J. W. M.) in dredge samples from Jervis Inlet, a fjord approximately 50 miles north-west of Vancouver, British Columbia (Fig. 1, inset map).