Ancient earthquakes caused the fragmentation of wall rock minerals
Recent findings on the fragmentation of wall rock garnets during deep crustal earthquakes have been featured in Titan, the science and technology newspaper of the Faculty of Mathematics and Natural Sciences.
Bjørn Jamtveit showing a frozen frictional melt in a sample from Holsnøy in Western Norway. Photo: Gunhild M. Haugnes. Lisens: CC BY 4.0
The Titan article (in Norwegian) refers to a recent Science Advances paper by Håkon Austrheim, Bjørn Jamtveit, Kristina Dunkel and collaborators from Utrecht and Montpellier, in which the authors describe the deformation and alteration of garnets next to ancient seismic faults in the Bergen Arcs. The processes recorded by these minerals ultimately led to a weakening of the rocks and influenced the large-scale evolution of this area.