Emplacement dynamics of highly viscous, silicic lava flows remain poorly constrained due to a lack consideration crystal-rich cases. models mostly apply glassy or microlitic, vesiculated rhyolitic flows. However, crystalline, vesicle-free can flow differently. We studied the Grande Cascade unit, which is vesicle-free, phenocryst-rich, trachytic in Monts Dore massif, France. Field work was carri...

Abstract. We studied the Zuccale Fault (ZF) on Elba, part of Northern Apennines, to unravel complex deformation history that is responsible for remarkable architectural complexity fault. The ZF characterized by a patchwork at least six distinct, now tightly juxtaposed brittle structural facies (BSF), i.e. volumes deformed rock given fault type, texture, colour, composition, and age formation. r...

We report on measurements of residual stress up to 300 MPa with a microfocused synchrotron X-ray beam in quartz fragments in a cataclasite from the damage zone of the San Andreas fault, California (USA). Samples were extracted from the San Andreas Fault Observatory at Depth drill core at a depth of 2.7 km. Stresses were derived from lattice distortions observed on Laue diffraction images. These...