stress field 16 Argentina 14 Neuquen Basin 8 Ordovician 6 Paleozoic 6 South America 6 basin evolution 6 deformation 6 microstructure 6 Breakout 4 Central andes 4 Croton ovalifolius 4 Cura 4 Dikes 4 Eocene 4 Jachal River 4 Jáchal River 4 Minor structures 4 Palaeozoic 4 Paleocene 4 Precordillera 4 Retroarc 4 Stress 4 Yerba Loca Formation 4 bitumen 4 borehole 4 borehole breakout 4 dike 4 displacement 4 extensional tectonics 4