Patagonia South America Argentina 127 Cretaceous 37 Andes 30 taxonomy 26 Jurassic 23 Western Hemisphere 23 World 23 morphology 22 paleomagnetism 22 climate change 20 Gondwana 18 fossil record 18 tectonic evolution 18 Santa Cruz [Argentina] 17 Chile 16 fossil 16 Chubut 14 Paleomagnetism 14 Tectonics 14 article 14 paleoenvironment 14 Rodentia 13 fold and thrust belt 13 subduction 13 Bacillariophyta 12 precipitation (climatology) 12 spatial distribution 12 steppe 12