Sunday, November 18, 2007

Quick! A Quiz for P!

Alright P., what kind of rocks make up the cliffs near Piha, NZ? Send me an email and earn a prize!


pascal said...

igneous rocks of course! not metamorphic or sedimentary. :0 :)

BW said...

Correct! At least I think so. Why?

Well, this entire area in NZ is essentially igneous - it's the land of volcanoes (extinct, I hope - although there are eruptions near here on occasion). Perhaps this is "agglomerate" rock, hence the inclusions. Nearby Lion Rock is the remnant of a volcanic plug.

As a sign in the geology school at the Uni says, "Auckland: it's OUR volcano."