| Lacui Formation | |
|---|---|
| Stratigraphic range: Serravallian (Laventan) ~ | |
| Type | Geological formation |
| Overlies | Ancud Volcanic Complex |
| Location | |
| Coordinates | 41°50′S 74°00′W / 41.833°S 74.000°W |
| Region | Chiloé Island (Los Lagos Region) |
| Country |  Chile |
| Type section | |
| Named for | Lacuy Peninsula |
| Named by | Valenzuela |
| Year defined | 1982 |
  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]
- ^ 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, Bibcode:2013MiPal..59..341F, doi:10.47894/mpal.59.4.01
- ^ 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.