Carissimi Associati SGI,
Carissimi Soci Società Associate,
su indicazione del Prof. Rodolfo Carosi (Università di Torino e Presidente SGI) vi segnaliamo l'ultimo podcast di Geology Bites (Conversations about geology with researchers making key contributions to our understanding of the Earth and the Solar System):
Renée Tamblyn (Postdoctoral Researcher at the University of Bern) - Origin of Continents.
Di seguito troverete il messaggio dell'ideatore, Oliver Strimpel, e il link al sito web di Geology Bites.
Cordiali saluti,
La Segreteria
Hello, listeners,
In this episode I talk to Renée Tamblyn about the origin of continents. Renée is a post-doctoral researcher at the University of Bern.
Two rock types play a central role in building continents — TTGs and komatiites. The former are granitic rocks high in quartz and plagioclase and low in K-feldspar. The latter are magnesium-rich volcanic rocks. It seems that water released from hydrous minerals plays a critical role in the formation of these rocks.
I suppose it's impressive that we know anything at all about what transpired 3-4 billion years ago, but, as Renée points out, there's a great deal we still don't know. A big outstanding puzzle is the timing of the growth of the volume of continental lithosphere. This figure, which shows what the various models predict, makes the point eloquently.
If you haven't already, it would be great if you left a review for Geology Bites on Apple podcasts or a comment on Spotify.
I hope you enjoy the episode.
Oliver
geologybites.com