Loreto Formation

Loreto Formation Stratigraphic range: Priabonian (Divisaderan)
Type	Geological formation
Underlies	not observed
Overlies
Lithology
Primary	Sandstone
Other	Conglomerate, coal
Location
Coordinates	53°06′S 71°06′W / 53.1°S 71.1°W / -53.1; -71.1Coordinates: 53°06′S 71°06′W / 53.1°S 71.1°W / -53.1; -71.1
Approximate paleocoordinates	55°18′S 61°24′W / 55.3°S 61.4°W / -55.3; -61.4
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 and the contact with an overlying formation is not observed.^[1]

Description[]

The formation contains fossil wood, leaf imprints and palynomorphs.^[2] Also fossil fish of Striatolamia macrota and Ischyodus dolloi and indeterminate Spheniscidae fossils have been found in the formation.^[3][4]

The formation crops out in Brunswick Peninsula and Sierra Baguales among other places.^[5]

References[]

Bibliography[]

• Bostelmann, Enrique; Jacobus P. Le Roux; Ana Vasquez; Nestor Gutiérrez; José Luis Oyarzún; Catalina Carreño; Teresa Torres; Rodrigo Otero, and Andrea Llanos, C. Mark Fanning, Sven N. Nielsen and Francisco Hervé. 2012. A revised lithostratigraphy of the Sierra Baguales, Magallanes Basin, 698–700. XIII Congeso Geológico Chileno. Accessed 2019-02-15.
• Otero, Rodrigo A.; Teresa Torres; Jacobus P. Le Roux; Francisco Hervé; C. Mark Fanning; Roberto E. Yuri Yáñez, and David Rubilar Rogers. 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. Accessed 2019-02-15.
• Sallaberry, M.A.; R.E. Yury Yáñez; R.A. Otero; S. Soto Acuña, and T.G. Torres. 2010. Eocene birds from the western margin of southernmost South America. Journal of Paleontology 84. 1061–1070. Accessed 2019-02-15.
• Torres, T.; H. Meón; R. Otero, and H. Galleguillos. 2009. Palinoflora y macroflora de la Formación Loreto, Punta Arenas, Región de Magallanes, Chile, 1–4. XII Congreso Geológico Chileno. Accessed 2019-02-15.