Loreto Formation
{{Infobox rockunit
| name = Loreto Formation
| image =
| caption =
| type = Geological formation
| period = Priabonian
| age = Priabonian (Divisaderan)
| prilithology = Sandstone
| otherlithology = Conglomerate, coal
| namedfor =
| namedby = Hoffstetter et al.
| year_ts = 1957
| region = Magallanes y la Antártica Chilena Region
| country = Chile
| coordinates = {{coord|53.1|S|71.1|W|display=inline,title}}
| paleocoordinates = {{coord|55.3|S|61.4|W|display=inline}}
| unitof =
| subunits =
| underlies = not observed
| overlies = Leña Dura Formation
| thickness =
| extent = Magallanes Basin
| area =
| map = {{Location map+ | Chile
| relief = 1
| width = 150
| float = center
| places =
{{Location map~ | Chile
| lat_deg = -53.1
| lon_deg = -71.1
| mark = Orange pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
Loreto Formation ({{langx|es|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.Torres et al., 2009, p.2 From 2013 to 2020 its coals were mined in Invierno mine, Riesco Island.{{Cite news |title=Los errores y contradicciones del caso Mina Invierno |url=https://www.guiaminera.cl/los-errores-y-contradicciones-del-caso-mina-invierno/ |access-date=2023-04-06 |work=Guía minera de Chile |language=Spanish}}{{Cite news |title=El silencioso primer año de Mina Invierno |url=https://www.df.cl/empresas/mineria/el-silencioso-primer-ano-de-mina-invierno |last=Pozo B. |first=Andrés |date=2014-08-11 |access-date=2023-03-15 |work=Diario Financiero |language=Spanish}}{{Cite news |title=Copec concreta la venta de su participación en Mina Invierno |url=https://www.reporteminero.cl/noticia/noticias/2022/03/copec-vende-su-participacion-mina-invierno |last=González Encina |first=Verónica |date=2022-03-08 |access-date=2022-06-08 |work=Reporte Minero |language=Spanish}}
Description
The formation contains fossil wood, leaf imprints and palynomorphs.Otero et al., 2012 Also fossil fish of Striatolamia macrota and Ischyodus dolloi and indeterminate Spheniscidae fossils have been found in the formation.Salaberry et al., 2010, p.1062[https://paleobiodb.org/classic/displayCollResults?collection_no=99478 Rio de las Minos] at Fossilworks.org
The formation crops out in Brunswick Peninsula and Sierra Baguales among other places.Bostelmann et al., 2012
References
{{reflist}}
= Bibliography =
- {{citation |last1=Bostelmann |first1=Enrique |last2=Le Roux |first2=Jacobus P.|last3=Vasquez |first3=Ana |last4=Gutiérrez |first4=Nestor |last5=Oyarzún |first5=José Luis |last6=Carreño |first6=Catalina |last7=Torres |first7=Teresa |last8=Otero |first8=Rodrigo |last9=Llanos, C. Mark Fanning, Sven N. Nielsen and Francisco Hervé |first9=Andrea |year=2012 |title=A revised lithostratigraphy of the Sierra Baguales, Magallanes Basin |url=http://biblioserver.sernageomin.cl/opac/DataFiles/14127_pp_698_700.pdf |publisher=XIII Congeso Geológico Chileno |pages=698–700 |archive-url=https://web.archive.org/web/20181103131245/http://biblioserver.sernageomin.cl/opac/DataFiles/14127_pp_698_700.pdf |accessdate=2019-02-15|archive-date=2018-11-03 }}
- {{citation |last1=Otero |first1=Rodrigo A. |last2=Torres |first2=Teresa |last3=Le Roux |first3=Jacobus P. |author4-link=Francisco Hervé |last4=Hervé |first4=Francisco |last5=Fanning |first5=C. Mark |last6=Yuri Yáñez |first6=Roberto E. |last7=Rubilar Rogers |first7=David |year=2012 |title=A Late Eocene age proposal for the Loreto Formation (Brunswick Peninsula, southernmost Chile), based on fossil cartilaginous fishes, paleobotany and radiometric evidence |url=https://scielo.conicyt.cl/pdf/andgeol/v39n1/art09.pdf |journal=Andean Geology |volume=39 |pages=180–200 |doi=10.5027/andgeoV39N1-a09 |accessdate=2019-02-15}}
- {{citation |last1=Sallaberry |first1=M.A. |last2=Yury Yáñez |first2=R.E. |last3=Otero |first3=R.A. |last4=Soto Acuña |first4=S. |last5=Torres |first5=T.G. |year=2010 |title=Eocene birds from the western margin of southernmost South America |url=http://repositorio.uchile.cl/bitstream/handle/2250/119221/Sallaberry_Michel_A.pdf?sequence=1 |journal=Journal of Paleontology |volume=84 |issue=6 |pages=1061–1070 |doi=10.1666/09-157.1 |bibcode=2010JPal...84.1061S |accessdate=2019-02-15}}
- {{citation |last1=Torres |first1=T. |last2=Meón |first2=H. |last3=Otero |first3=R. |last4=Galleguillos |first4=H. |year=2009 |title=Palinoflora y macroflora de la Formación Loreto, Punta Arenas, Región de Magallanes, Chile |url=http://www.paleobotanica.uchile.cl/pdf/S12_018.pdf |publisher=XII Congreso Geológico Chileno |pages=1–4 |accessdate=2019-02-15}}
{{Geology of Chile}}
Category:Geologic formations of Chile
Category:Eocene Series of South America
Category:Conglomerate formations
Category:Paleontology in Chile
Category:Shallow marine deposits