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M-8a, Cerro Buque [Chilcatay Fm] (Miocene of Peru)

Where: Peru (14.6° S, 75.7° W: paleocoordinates 15.6° S, 71.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Chilcatay Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Chilcatay Fm, which regionally, is unconformably overlain by the Pisco Fm (Middle Miocene). AGE: late Oligocene to early Miocene on the basis of K/Ar dates, siliceous microfossil zonation, and molluscan biostratigraphy supports. Stated in text to be of Early Miocene age. STRATIGRAPHIC POSITION: From middle of section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; silty sandstone

• ENVIRONMENT: Not discussed in text, but appears to be from relatively shallow marine siliciclastic setting.
• SPECIFIC LITHOLOGY: Silty sandstone. LITHIFICATION: Not stated in text.

Size class: macrofossils

Collection methods: COLLECTOR: Not stated in text. REPOSITORY: Unknown.

Primary reference: A. Alván, J. Apolín, and C. Chacaltana. 2004. Los dientes de Seláceos (Condrichthyies) y su aplicaión estratigráfica en Las Lomas de Ullujaya (Ica, Perú). XIII Congreso Peruano de Geología. Resúmenes Extendidos 595-598 [A. Hendy/A. Hendy/A. Hendy] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 113249: authorized by Austin Hendy, entered by Austin Hendy on 24.07.2011

Creative Commons license: CC BY (attribution)