Annotated record of the detailed examination of Mn deposits from R.R.S. "Discovery" Cruise 4 stations

A total of 36 coring stations were worked during the cruise of which twenty-five were successful. Both piston and free-fall gravity coring techniques were employed and the cores were extruded and rough logged on board ship as soon as they had been taken. Twelve dredge stations were occupied on the cruise, all of them lying in the Peake Deep area, and nine were successful.