Lacui Formation
| Lacui Formation Stratigraphic range: Serravallian (Miocene) |
|
|---|---|
| Type | Geological formation |
| Overlies | Ancud Volcanic Complex |
| Location | |
| Region | Chiloé Island (Los Lagos Region) |
| Country | Chile |
| Type section | |
| Named by | Valenzuela, 1982 |
Lacui Formation (Spanish: Formación Lacui) is a marine Miocene sedimentary formation located in Chiloé Island with minor outcrops near Carelmapu on the mainland.Gastropod shells are the most common macrofossils of Lacui Formation. According to Sernageomin (1998) the formation dates to the earliest Serravallian — that is the Middle Miocene.
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