Lacui Formation

Lacui Formation
Stratigraphic range: Serravallian (Laventan) ~13.8–11.8 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Overlies	Ancud Volcanic Complex
Location
Coordinates	Lacui Formation (Chile)

Lacui Formation (Spanish: Formación Lacui) is a marine Miocene sedimentary formation located in Chiloé Island with minor outcrops near Carelmapu on the mainland.^[1]^[2] Gastropod shells are the most common macrofossils of Lacui Formation.^[2] According to Sernageomin (1998) the formation dates to the earliest Serravallian — that is the Middle Miocene.^[2]

South of Lacui Formation there are equivalent sedimentary rocks in the islands of Ipún, Lemo and Stoke.^[3]

References

^ Charrier, R.; Pinto, L.; Rodríguez, M.P. (2007). "Tectonostratigraphic evolution of the Andean Orogen in Chile". In Moreno, Teresa; Gibbons, Wes (eds.). The Geology of Chile. Geological Society of London. pp. 92–96.
^ ^a ^b ^c Finger, Kenneth L. (2013), "Miocene foraminifera from the south-central coast of Chile" (PDF), Micropaleontology, 59 (4–5): 341–492
^ Encinas, Alfonso; Folguera, Andrés; Bechis, Florencia; Finger, Kenneth L.; Zambrano, Patricio; Pérez, Felipe; Benarbé, Pablo; Tapia, Francisca; Riffo, Ricardo; Buatois, Luis; Orts, Darío; Nielsen, Sven N.; Valencia, Victor V.; Cituño, José; Oliveros, Verónica; De Girolamo Del Mauro, Lizet; Ramos, Víctor A. (2018). "The Late Oligocene–Early Miocene Marine Transgression of Patagonia". In Folguera, A.; Contreras Reyes, E.; Heredia, N.; Encinas, A.; Iannelli, S. B.; Oliveros, V.; M. Dávila, F.; Collo, G.; Giambiagi, L.; Maksymowicz, A.; Iglesia Llanos, M.P.; Turienzo, M.; Naipauer, M.; Orts, D.; Litvak, V. D.; Alvarez, O.; Arriagada, C. (eds.). The Evolution of the Chilean-Argentinean Andes. Springer. pp. 443–474. ISBN 978-3-319-67774-3.

Terranes

Sedimentary
formations
and groups

Cretaceous	Baños del Flaco Fm. Cerro Colorado Fm. Chacarilla Fm. Chañarcillo Gp. Coihaique Gp. Divisadero Gp. Dorotea Fm. Hornitos Fm. La Liga Fm. Ñirehuao Fm. Punta del Cobre Fm. Purilactis Gp. Quiriquina Fm. Viñita Fm. Way Gp. Zapata Fm.
Jurassic	Chacarilla Fm. Coihaique Gp. Ibáñez Fm. La Liga Fm. La Negra Fm. Nacientes del Biobío Fm. Nacientes del Teno Fm. Pan de Azúcar Fm. Tobífera Fm.
Triassic	Canto del Agua Fm. Choiyoi Gp. Panguipulli Fm. Santa Juana Fm. Tralcán Fm.