Cariy Sandstone, Unit 4 (Silurian to of Paraguay)

Where: Paraguay (25.0° S, 58.0° W: paleocoordinates 47.2° S, 140.3° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Salopochtina monterrosae other zone, Cariy Sandstone Formation, Telychian to Telychian (438.5 - 430.5 Ma)

• Unit 4 (informal) (from bottom). Harrington provisionally places this formation as Llandovery. Grahn and Gutierrez (2001, PBDB ref. 7139), on the basis of chitinizoan zonation, conclude that it spans Telychian to Sheinwoodian ages. Unit 4

• member-level stratigraphic resolution

Environment/lithology: marine; yellow sandstone and yellow shale

• "The Cairy Sandstone, which forms the upper part of the Itacuburi Group, conformably overlies the Vargas Pena Shale and is unconformably overlain by upper Paleozoic glacial deposits. The sandstones and intercalated clay-shales were deposited in a marine environment, probably ranging from proximal neritic to sublittoral."
• "Thin-bedded, well-stratified, fine-grained, yellowish-white to yellowish-brown sandstones, with a few thin beds of yellowish-white shales and intercalations of lilac and deep violet colored micaceous sandstones."

Size class: macrofossils

Primary reference: H. J. Harrington. 1972. Silurian of Paraguay. Geological Society of America Special Paper 133:41-50 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 25566: authorized by Michael Foote, entered by Michael Foote on 18.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
Gastropoda
 Murchisoniina - Eotomariidae
Eotomaria sp. Ulrich and Scofield 1897 snail
Lophophorata
 Tentaculitida - Tentaculitidae
Strophomenata
 Strophomenida -
 Strophomenida - Leptostrophiidae
"Australostrophia conradii" = Eostropheodonta conradii
"Australostrophia conradii" = Eostropheodonta conradii Harrington 1950
Rhynchonellata
 Rhynchonellida - Leptocoeliidae
Trilobita
 Proetida - Proetidae
Proetus sp. Steininger 1831 trilobite
genus name in quotes
 Phacopida - Homalonotidae
? Trimerus sp. Green 1832 trilobite
 Phacopida - Calmoniidae
Pterobranchia
 Graptoloidea - Diplograptidae
 Life -
Skolithos sp. Haldemann 1840