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| | Ordovician Magmatism of the Sierras Pampeanas |
 | | The granitoids plutons correspond to the Macón, Chiquivar, Taca-Taca, Chuquilaqui, Arita, Archibarca, Antofalla, south of Petaquilla, Batin and Campo Negro, and the continuation in Chile in the Cordón de Lila and Almeida range, with the Choschas and Tucúcaro granitoids, all them are intrusives in sedimentary or metamorphic basement with ordovician ages or older. |
 | | Miller (1999) interpreted the granitoids as originated from a transpressional collision. |
 | | It is probable that they have been generated in the margin of the Arequipa- Antofalla massif, while the tardi to posttectonic granites of the central Batholithic Zone, have been generated from an ensialic, thickened crust for a rapid adiabatic decompression (Rossi et al. |
| www.unt.edu.ar /fcsnat/INSUGEO/geologia_16/22-Toselli.htm (5765 words) |
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