| 词条 | Ayacara Formation |
| 释义 |
| name = Ayacara Formation | image = | caption = | type = Geological formation | period = Miocene | age = Early–Middle Miocene | prilithology = Sandstone, siltstone, conglomerate | otherlithology = | namedfor = | namedby = Levi et al., 1966 | region = Los Lagos Region | country = {{CHL}} | coordinates = {{coord|42.313205|S|72.651125|W|display=inline,title}} | unitof = | subunits = | underlies = | overlies = | thickness = at least {{convert|800|m|ft|abbr=on}} | extent = | area = | map = {{Location map+ | Chile | relief = 1 | width = 200 | float = center | places = | lat_deg = -42.313205 | lon_deg = -72.651125 | mark = Yellow pog.svg | marksize = 12 }} | map_caption = }} The Ayacara Formation is a sedimentary formation made up of interbedded sand and siltstone cropping out around Hornopirén and Ayacara Peninsula in western Los Lagos Region, Chile. Less common rocks are tuff and conglomerate. The formation dates to the Early and Middle Miocene (no earlier than 21.8–17.6 million years ago) when it deposited during a marine transgression.[1] See also{{portal|Geology|Neogene|Chile|Prehistory of South America}}
References1. ^{{cite book |last1=Encinas|first1=Alfonso |last2=Folguera|first2=Andrés|last3=Bechis|first3=Florencia|last4=Finger|first4=Kenneth L.|last5=Zambrano|first5=Patricio|last6=Pérez|first6=Felipe|last7=Benarbé|first7=Pablo|last8=Tapia|first8=Francisca|last9=Riffo|first9=Ricardo|last10=Buatois|first10=Luis|last11=Orts|first11=Darío|last12=Nielsen|first12=Sven N. |last13=Valencia|first13=Victor V.|last14=Cituño|first14=José |last15=Oliveros|first15=Verónica |last16=De Girolamo Del Mauro|first16=Lizet|last17=Ramos|first17=Víctor A.|date=2018 |chapter=The Late Oligocene–Early Miocene Marine Transgression of Patagonia|title=The Evolution of the Chilean-Argentinean Andes|editors=Folguera, A., Contreras Reyes, E., Heredia, N., Encinas, A., B. Iannelli, S., Oliveros, V., M. Dávila, F., Collo, G., Giambiagi, L., Maksymowicz, A., Iglesia Llanos, M.P., Turienzo, M., Naipauer, M., Orts, D., D. Litvak, V., Alvarez, O., Arriagada, C. |url= |location= |publisher=Springer|pages=443–474 |isbn=978-3-319-67774-3 |author-link17=Víctor Alberto Ramos}} {{Geology of Chile}} 8 : Geologic formations of Chile|Miocene Series of South America|Neogene Chile|Sandstone formations|Siltstone formations|Conglomerate formations|Tuff formations|Geology of Los Lagos Region |
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