#Mafic

Have you ever wondered why there are no #Archean UHP eclogites older than c. 0.8 Ga if #plate #tectonics has operated since c. 3 Ga, and isolated #subduction complexes formed

Morgaine le Fee

I'm starting a #geology thread with #GlacialErratics I found in my region (Västerbotten, Sweden. Last glaciation: Weichsel, ended ca. 10ky ago).The first one is a porphyry.Found in: Umeå (esker)Probably from:

After six cancelled field tips this year (and counting) may I present the closest thing to fieldwork I can still do, “The 2020 Lockdown Field Guide to the Geology Of

01/60THREAD"How does Earth 'Manufacture' Land?Some aspects of Natural History in the Indian Context" The witticism “Buy Land. They ain't making any more of the stuff” is true, of course, if

Dr Janine Krippner

Hey Twitter family! What do you want to know about volcanoes? What topics could brighten your day for a few moments? Let me know below! Let's get through this together