The Floors of the Ocean: 1. The North Atlantic / Text to accompany the physiographic diagram of the North Atlantic

CONTENTS

	PAGE
Abstract	1
Part 1. Preparation of the Physiographic Diagram	3
Part 2. Physiographic Provinces	11
Introduction	11
Nomenclature and classification of deep-sea relief	11
Units of depth and slope	12
Continent and ocean	16
Continental margin	17
Definition and general categories	17
General categories	17
Category I provinces	17
Category II provinces	18
Category III provinces	19
Regional description of continental margin	21
Benches and terraces of the continental margin	41
Geology and geophysics of continental-margin physiographic provinces	51
Seismicity of the continental-margin provinces	51
Magnetic anomalies and continental-margin physiographic provinces	51
Crustal structures and continental-margin provinces	52
Sediment distribution and physiographic provinces of the continental margin	53
Past, present, and future of the continental-margin provinces	53
Ocean-basin floor	55
General description	55
Abyssal plains	55
General discussion	55
Regional description	57
Abyssal hills	61
Definition and distribution	61
Regional description	63
Origin of abyssal-hills topography	65
Other major features of the abyssal floor	66
Abyssal gaps	66
Mid-ocean canyons	66
Regional description	66
Origin of abyssal-floor topography	74
Oceanic rises	74
Definition and distribution	74
Regional description	74
Seamounts of the ocean-basin floor	78
Seismicity of the ocean-basin floor	80
Ocean-basin floor provinces and crustal structure	80
Mid-oceanic ridges	83
Definition	83
Mid-Atlantic Ridge	83
Provinces of the Mid-Atlantic Ridge	Clyx.com