I was looking at the high res images of the breakup and noticed something I've always wanted to see. Which is what does the iceberg look line under the under the sea?

Take a look at the labeled iceberg. About 90% of it is blue and 10% is white. I'm speculating that its a slice of the tabular icesheet that has flipped on its side exposing the ice normally below sealevel. I expect that the blue color may mark the region previously below seawater. If the floating bergs are 25 m high, the depth below sea level would be about 200m making the whole berg about 225 m thick.