Which of the following forms at mid-ocean ridges?
a. island arcs
b. deep-sea trenches
c. guyots
d. new ocean floor

Approximately how many million years older than bedrock layer b is bedrock layer d

The mantle is made up of which structural zones?

You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone, pumice, and gneiss.