January 30th 2012 y oceans start off small, we looked at east africa, and today see the maturation of it like the. Inactive areas too: leaky transforms, where we have volcanoes growing along the transform, small volcanoes along transform and its called a leaky transform, san andreas fault. on the way up to canada san francisco and l. amoving n. w to relative of north. much of b. c and yukon, and western areas made up of terrains. slivers of continental crust, that has been torn off of north america. Look at rocks and sediments down there and have fossils originated away now in the north. that s how much of western north america was developed. Sulphides: canadian shield, ancient ocean floors, life originated here, its suggest that y. Iceland is torn into two, because it s a stride, boundary between north american and eurasian plate.