Cariy Sandstone, Unit 2 (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 2 (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 2

• member-level stratigraphic resolution

Environment/lithology: marine; micaceous, yellow sandstone and gray claystone

• "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."
• "Well-bedded, yellow to reddish-brown, fine-grained micaceous sandstones, with intercalations of ligh-gray to whitish clay-shale..."

Size class: macrofossils

Collection methods: I have combined lists from Cerro Aparipi and Cerro Pero.

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 25568: authorized by Michael Foote, entered by Michael Foote on 18.09.2002, edited by Pete Wagner and Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Pterobranchia
 Graptoloidea - Monograptidae
"Climacograptus innotatus" = Paraclimacograptus innotatus
"Climacograptus innotatus" = Paraclimacograptus innotatus Nicholson 1869 graptolite
subsp. brasiliensis Ruedemann
Strophomenata
 Strophomenida -
Rhynchonellata
 Rhynchonellida - Leptocoeliidae
 Rhynchonellida - Camarotoechiidae
? Camarotoechia sp. Hall and Clarke 1893
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites sp. n. sp. von Schlotheim 1820
Gastropoda
 Murchisoniina -
Murchisonioidea indet.2 Koken 1896 snail
Bivalvia
  -
Bivalvia indet.1 Linnaeus 1758 clam
 Nuculanida - Cucullellidae
 Solemyida - Ctenodontidae
? Ctenodonta sp. Salter 1852 clam
Trilobita
 Phacopida - Homalonotidae
Trimerus (Trimerus) sp. Green 1832 trilobite
n. sp. Wolfart
 Phacopida - Calymenidae
"Diacalymene aff. crassa" = Dekalymene crassa, Calymene boettneri, Calymene sp.
"Diacalymene aff. crassa" = Dekalymene crassa Shirley 1936 trilobite
Calymene sp. Brongniart 1822 trilobite
 Phacopida - Calmoniidae