Caleta Chonos Formation

Caleta Chonos Formation Stratigraphic range: Oligocene
Type	Geological formation
Underlies	Ancud Volcanic Complex
Overlies	Bahía Mansa Metamorphic Complex
Lithology
Primary	Conglomerate, sandstone
Other	Coal, tuff breccia
Location
Region	Los Lagos Region
Country	Chile
Type section
Named for	Caleta Chonos

Caleta Chonos Formation (Spanish: Formación Caleta Chonos) is a geological formation of Oligocene age located around Chacao Channel in southern Chile. The formation overlies Bahía Mansa Metamorphic Complex and is overlain by the Ancud Volcanic Complex. It crops out in northwestern Chiloé Island in the isthmus of Lacuy Peninsula.

...
Wikipedia