Cerro Juan de Morales, Unit 7, Quebrada Honda (Permian of Chile)

Where: Chile (20.1° S, 69.3° W: paleocoordinates 32.4° S, 44.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Juan de Morales Formation, Kungurian (279.3 - 272.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified marl

• Laminated and bioturbated marls and shales may be interpreted as lagoonal deposits, whereas the limestones (mostly packstones and grainstones) may be

•interpreted as bioclastic bars.

Size class: macrofossils

Preservation: replaced with silica

Primary reference: E. Díaz-Martínez, B. Mamet, P. E. Isaacson and G. W. Grader. 2000. Permian marine sedimentation in northern Chile: new paleontological evidence from the Juan de Morales Foramtion, and regional paleogeographic implications. Journal of South American Earth Sciences 13:511-525 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40948: authorized by David Bottjer, entered by Matthew Clapham on 04.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• The fossil fauna present in this middle member is very rich, and consists of foraminifers, bryozoans, brachiopods, gastropods, crinoids, pelecypods and ostracodes. The most conspicuous are the large silicified productid brachiopods (predominantly Waagenoconcha humboldti), which are left over from the erosion of the marl beds and cover the surface of the outcrop. Other fossils not named.
 Productida - Echinoconchidae
Waagenoconcha humboldti d'Orbigny 1842