Abstract
A new, inexpensive and easy-to-handle box corer (47 × 47 × 114 cm 3) is described. It is found to be extremely handy when operated from ships equipped with piston coring devices. The box corer uses the same piston core-head (∼1000 kg) and the same trigger mechanism as used in piston coring. The whole operation is similar to that of piston coring. At three sites in the nodule-rich abyssal-hill province in the northwest Atlantic, the vertical distributions of the manganese nodules were obtained from the box cores. More than 75% of the nodules by weight is present in the top 10 cm of the sediment; 16–24% is present in the 10–20 cm interval and about 1% in the 20–30 cm interval. Very few nodules are found below 30 cm.
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