Abanico Formation, Geological formation in O'Higgins Region, Chile
The Abanico Formation extends through central Chile with sedimentary layers reaching depths of three kilometers beneath the Andes mountains.
The formation dates from the Eocene to Miocene periods, accumulating various sediments during the Andean mountain formation process over millions of years.
Scientists study the formation's fossil records near Tinguiririca River, revealing ancient mammals that existed between 30 to 20 million years ago.
Researchers access the formation through two parallel north-south strips between 33 and 36 degrees south latitude in the Chilean Andes.
The formation contains volcaniclastic sediments including basalts, andesites, and dacites, with specific areas showing prehnite-pumpellyite facies metamorphism.
Location: O'Higgins Region
Location: Santiago Metropolitan Region
Location: Valparaíso Region
GPS coordinates: -35.00000,-70.40000
Latest update: March 5, 2025 15:19
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