"New 3D mapping has revealed remarkable features of a sprawling submerged ridge east of Auckland - a feat one scientist says is the undersea equivalent of Captain Cook mapping the coastline of New Zealand. ... The new data revealed the ridge was far from entirely volcanic in origin, which had surprised some scientists.
"We set out to map what we thought was an ancient volcanic arc. We were surprised to find it wasn't dominated by volcanic rocks, but more a mixture of them with large tracts of sedimentary rocks."
Via Catherine Russell