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Estero Trapa Trapa West (Miocene to of Chile)

Also known as Laguna del Laja

Where: Bío Bío, Chile (37.7° S, 71.2° W: paleocoordinates 38.2° S, 67.0° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Cura-Mallín Formation, Santacrucian to Santacrucian (17.5 - 11.8 Ma)

• The ranges of these taxa suggest a Santacrucian SALMA for the high northern Trapa Trapa West fossil-producing levels. It is more difficult to correlate the fauna from the highest part of the Trapa Trapa West sequence to a specific SALMA, although it may be as young as Laventan

• 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 140105: authorized by Carlos Jaramillo, entered by Juan Carrillo on 01.03.2013

Creative Commons license: CC BY (attribution)