Learnt about Palagonite tuffs on the bus on the way here.
Lately, geologists are paying increased attention to the Palagonite Formation in Iceland, partly because similar formations apparently exist on the planet Mars. The palagonite is mostly formed as hyaloclastite (loose, glassy material) in subglacial eruptions.
The Icelandic web of science (http://www.why.is/svar.php?id=4806)
It’s formed on the isle of Surtsey too, which is an exciting place all round, forming as it did from an eruption which only started in 1963.
Iceland is mostly basalt (90 ish %)
This seemed like an exciting post when it started, ummm, I think perhaps it’ll only appeal to a few folks