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Trapa Trapa East mid-upper beds (Miocene to of Chile)

Also known as Laguna del Laja

Where: Bío Bío, Chile (37.7° S, 71.2° W: paleocoordinates 38.3° S, 66.4° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Cura-Mallín Formation, Santacrucian to Santacrucian (17.5 - 15.5 Ma)

• The Trapa Trapa East sequence preserves faunas that seem assignable to at least three distinct early–late Miocene SALMAs, from as old as Colhuehuapian or Santacrucian to at least as young as Friasian or Mayoan

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; volcaniclastic, muddy sandstone and conglomerate

• Our analyses indicate that the exposed thickness of the Cura-Mallin Fm southeast of Laguna del Laja exceeds 1800 m, consisting of interbedded predominantly-fluviatile volcaniclastics with minor facies

•possibly indicative of short-lived lacustrine phases

• Volcaniclastic sandstone, mudstone and granule conglomerate

Size class: macrofossils

Collected in 2001-2005; reposited in the SGOPV

Primary reference: J. J. Flynn, R. Charrier, D. A. Croft, P.B. Gans, T. M. Herriott, J. A. Wertheim, and A. R. Wyss. 2008. Chronologic implications of new Miocene mammals from the Cura-Mallín and Trapa Trapa formations, Laguna del Laja area, south Central Chile. Journal of South American Earth Sciences 26:412-426 [C. Jaramillo/J. Carrillo] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 140107: authorized by Carlos Jaramillo, entered by Juan Carrillo on 01.03.2013

Creative Commons license: CC BY (attribution)