Author | Lightnews

Sally Law

@sallylaw.bsky.social

49 followers 77 following 2 posts

Petrologist and geochemist @ University of Edinburgh, interested in Early Earth, and ponies.

Posts Media Videos Starter Packs

Sally Law @sallylaw.bsky.social · Jul 10

Did Earth’s first continents form in subduction zones?

Me and Alan Hastie think so!

Why? Read in detail here in Journal of Petrology doi.org/10.1093/petr...

The take home: Melting @ < 60km ➡️ No rutile ➡️ no Nb anomaly ➡️ no continental crust signature.

Rutile + garnet only stable at ≥60 km.

Subduction Origin of the Nb Anomaly in Earth’s Oldest Continents

Abstract. Earth is unique in the solar system in having plate tectonics, which controls the growth of life-sustaining continents and the habitability of ou

doi.org

5 10

Sally Law @sallylaw.bsky.social · Dec 16

Only just realising there's an alternative to twitter trash!