Earth:Loreto Formation
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| Loreto Formation Stratigraphic range: Priabonian (Divisaderan) | |
|---|---|
| Type | Geological formation |
| Underlies | not observed |
| Overlies | Leña Dura Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Conglomerate, coal |
| Location | |
| Coordinates | [ ⚑ ] : 53°06′S 71°06′W / 53.1°S 71.1°W |
| Paleocoordinates | [ ⚑ ] 55°18′S 61°24′W / 55.3°S 61.4°W |
| Region | Magallanes y la Antártica Chilena Region |
| Country | Chile |
| Extent | Magallanes Basin |
| Type section | |
| Named by | Hoffstetter et al. |
| Year defined | 1957 |
  Loreto Formation (Chile) | |
Loreto Formation (Spanish: Formación Loreto) is a sedimentary formation of Late Eocene age in the southernmost Magallanes Basin. It overlies the Leña Dura Formation and the contact with an overlying formation is not observed.[1] From 2013 to 2020 its coals were mined in Invierno mine, Riesco Island.[2][3][4]
Description
The formation contains fossil wood, leaf imprints and palynomorphs.[5] Also fossil fish of Striatolamia macrota and Ischyodus dolloi and indeterminate Spheniscidae fossils have been found in the formation.[6][7]
The formation crops out in Brunswick Peninsula and Sierra Baguales among other places.[8]
References
- ↑ Torres et al., 2009, p.2
- ↑ "Los errores y contradicciones del caso Mina Invierno" (in Spanish). Guía minera de Chile. https://www.guiaminera.cl/los-errores-y-contradicciones-del-caso-mina-invierno/.
- ↑ Pozo B., Andrés (2014-08-11). "El silencioso primer año de Mina Invierno" (in Spanish). Diario Financiero. https://www.df.cl/empresas/mineria/el-silencioso-primer-ano-de-mina-invierno.
- ↑ González Encina, Verónica (2022-03-08). "Copec concreta la venta de su participación en Mina Invierno" (in Spanish). Reporte Minero. https://www.reporteminero.cl/noticia/noticias/2022/03/copec-vende-su-participacion-mina-invierno.
- ↑ Otero et al., 2012
- ↑ Salaberry et al., 2010, p.1062
- ↑ Rio de las Minos at Fossilworks.org
- ↑ Bostelmann et al., 2012
Bibliography
- Bostelmann, Enrique; Le Roux, Jacobus P.; Vasquez, Ana; Gutiérrez, Nestor; Oyarzún, José Luis; Carreño, Catalina; Torres, Teresa; Otero, Rodrigo et al. (2012), A revised lithostratigraphy of the Sierra Baguales, Magallanes Basin, XIII Congeso Geológico Chileno, pp. 698–700, http://biblioserver.sernageomin.cl/opac/DataFiles/14127_pp_698_700.pdf, retrieved 2019-02-15
- Otero, Rodrigo A.; Torres, Teresa; Le Roux, Jacobus P.; Hervé, Francisco; Fanning, C. Mark; Yuri Yáñez, Roberto E.; Rubilar Rogers, David (2012), "A Late Eocene age proposal for the Loreto Formation (Brunswick Peninsula, southernmost Chile), based on fossil cartilaginous fishes, paleobotany and radiometric evidence", Andean Geology 39: 180–200, doi:10.5027/andgeoV39N1-a09, https://scielo.conicyt.cl/pdf/andgeol/v39n1/art09.pdf, retrieved 2019-02-15
- Sallaberry, M.A.; Yury Yáñez, R.E.; Otero, R.A.; Soto Acuña, S.; Torres, T.G. (2010), "Eocene birds from the western margin of southernmost South America", Journal of Paleontology 84 (6): 1061–1070, doi:10.1666/09-157.1, Bibcode: 2010JPal...84.1061S, http://repositorio.uchile.cl/bitstream/handle/2250/119221/Sallaberry_Michel_A.pdf?sequence=1, retrieved 2019-02-15
- Torres, T.; Meón, H.; Otero, R.; Galleguillos, H. (2009), Palinoflora y macroflora de la Formación Loreto, Punta Arenas, Región de Magallanes, Chile, XII Congreso Geológico Chileno, pp. 1–4, http://www.paleobotanica.uchile.cl/pdf/S12_018.pdf, retrieved 2019-02-15
Template:Sedimentary formations and groups in Chile
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