Question 1
Which of the following is associated with ocean ridges?
◦ volcanic structures
◦ rift zones
◦ mountainous topography
◦ all of these
Question 2
The crests of mid-oceanic ridges ________.
◦ are geologically old features
◦ contain active rift zones
◦ lie at depths exceeding 6 kilometers
◦ are heavily mantled with sediment