The oceanic trenches are the deepest parts of the ocean floor, typically formed when one tectonic plate slides under another. Major world trenches include:
... 7 - Ernst Ginsberg[?], actor and film director (+ 1964)
February 11 - Henry LaBouisse[?], head of UNICEF (1965-1979)
February 11 - Sir Keith Holyoake, New Zealand ...