The Seafloor

1
The Seafloor
2
Continental margin Shelf, slope, rise
3
Submarine canyons, turbidity currents

• Relationships between
• shelf,
• slope, canyons,
• fans,
• rise

4
Abyssal plain

• Vast and flat
• Interrupted by
• Seamounts (volcanic in origin)
• Guyots or tablemounts (eroded islands)

5
Formation of guyots
Found on abyssal plains
6
Location of mid-ocean ridges
7
Mid-ocean ridges, transform faults, fracture zones
8
Formation of hydrothermal vents
9
Black smoker
10
ALVIN
11
Tube worms at smoker
12
Black lines center of ridges Offsets
transform faults Long red lines fracture zones
13
Location of trenches
14
Trenches
15
A review