[Italic Page Numbers Indicate Major References] Abra Pampa, 191
Index [Italic page numbers indicate major references] Abra Pampa, 191 amygdules, 84, 97 andesine, 160 Absaroka Range, 206 Anallajchi stratovolcano, 248 andesites, 14, 39, 47, 52, 54, 59, 64, absarokites, 202, 204, 206, 208, 213, Ananea basin, 270 70, 94, 116, 122, 125, 127, 133, 267, 269 Ancasti, 197 135, 182, 221, 223, 227, 248, accretionary prism, 271 Ancud-Rio Chubut lineament, 30 251, 254, 267 acites, 268 Andean arc, central, 237 basaltic, 59, 63, 94, 98, 122, 125, Aconcagua Andean Batholith, 39 134, 234, 248, 249, 251, 268 andesite, 124, 133 Andean belt, 33 flows, 247, 251 lavas, 133 western margin, 31 hornblende, 135, 142 rocks, 117, 125 Andean Central Volcanic Zone, 139 parent, 221 Aeolian Arc, 268 Andean chain, 292, 293, 294, 295 silicic, 126 African plate, 280 paleomagnetic data, 291 tholeiitic, 181 African poles, 294 Andean convergent zone, 260 anomalies aggregates, 203, 253 Andean Cordillera, 35, 38, 39, 40, 41, Bouguer, 281, 285, 288 agglomerates, 47 89, 202, 260, 271 Eu, 52, 104, 106, 126, 127, 134, Agua de la Zorra region, 83, 84 central region, 116, 125,132, 134, 171 Agua del Milagro, 248 135 free-air, 281 Aguada de la Perdiz Formation, 186 eastern, 249 gravity, 283 Airy-Heishanen model, 283 main, 30 isostatic, 282, 288 albite, 160 northern region, 116, 125,133, magnetic, 260 Alcohuas pluton, 102 135 thermal, 76 Aleutian plutonic rocks, 124 southern region, 116, 117, 122, Antarctic Plate, 2, 54 Algarrobal Formation, 100 133, 135 Antarctic-Nazca Plate, 2 alkaline suites, 251 western, 245, 256 Antuco volcano, 240 allanite,
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