Amphibolite Rheology During Shearing, Jorcorico, Sierra de Cordoba, Argentina
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 Folding and fracturing of amphibolite layer within mylonitic pelite. View subparallel to stretching lineation. |
Detail of fractured amphibolite layer, and foled metapelite. |
 Sheath folding of an amphibolite layer. View up-plunge of stretching lineation. |
Fractured thick amphibolite block with foled metapelite intruding the fracture as if it was liquid. Fracture is narrower than it appears due to cut effect. |
 Folding and fracturing of amphibolite layer, down to small isolated blocks swimming in pelite. |
Detail, arrows point to small amphibolite blocks broken up from continuous layers. |
 Sheath folds. View subparallel to stretching lineation. |
Tight folds and sheared pegmatite feldspar with asymmetry indicative of top-to-right. View subparallel to stretching lineation. |
 Amphibolite block, broken up. |
Detail. |
 Amphibolite block broken up into a clast at the same time as narrow amphibolite bands flow around the clast. |
Broken-up amphibolite layer. Strongly folded pelites. |
 Amphibolite clast surrounded by mylonitic, pelite foled into its strain shadow. |
Detail showing a very narrow, perhaps only a few crystals wide, strongly stretched layer of amphibolite marked by the blue arrows. Contrast in behaviour of amphibolite: depends on layer width? |