Table 1.

The important seafloor features near each sampling site are listed.

	Site number
Feature	1	2	3	4	5	6
Drill cuttings splay (M)		Y	Y	Y	Y
Embayment bounding ridge (N)				Y
Eroded seabed (A)			Y
Exposed landslide deposit (N)				Y
Landslide visible at seabed (N)			Y
Main landslide headwall scarp (N)			Y	Y
Main landslide shear (N)			Y		Y
Major crustal fault at seabed (N)				Y
Man-made objects, debris (M)			Y	Y	Y
Mud mound or mud volcano flow track (N)			Y		Y
Mud volcano (N)	Y		Y	Y
Plugged and abandoned oil and gas well (M)			Y	Y	Y
Plugged and abandoned oil well (M)			Y	Y	Y
Prospecting (M)			Y	Y	Y
Tension crack (A)			Y

Sample sites were chosen in part based on important sea floor features. Some features are man-made (M), while others result unintentionally from anthropogenic activities (A). All other features are assumed to be natural (N).