Tazareh Section, Alburz Mts, Storm dominated shelf fazies 2 (Jurassic to of Iran)

Where: Iran (36.4° N, 54.5° E: paleocoordinates 13.7° S, 47.5° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Shemshak Formation, Middle Toarcian to Middle Toarcian (182.0 - 171.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, bioturbated, fine-grained, silty sandstone

• Storm dominated shelf environment; Altogether, the facies associations discussed here are interpreted as having been deposited on a middle siliciclastic shelf, sandwiched between sediments of the inner and outer shelf
• Rubbly, bioturbated poorly cemented, occasionally bioclastic (Fig.5D), silty fine-grained sandstone with the trace fossils Chondrites and Zoophycos, scattered calcite-cemented concretions, some wood fragments, and thin (usually <5 cm, rarely also 10 cm thick), near-monospecific shell beds...

Size class: macrofossils

Primary reference: F. T. Fürsich, M. Wilemsen, K. Seyed-Emami, F. Cecca, and M. R. Majidifard. 2005. The upper Shemshak Formation (Toarcian–Aalenian) of the Eastern Alborz (Iran): Biota and palaeoenvironments during a transgressive–regressive cycle. Fazies 51:365-384 [M. Aberhan/T. Schossleitner/T. Schossleitner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 141254: authorized by Martin Aberhan, entered by Thomas Schossleitner on 22.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida -
Polychaeta
 Sabellida - Serpulidae
Serpulidae indet. Rafinesque 1835
Bivalvia
 Arcida - Arcidae
"Arca (Eonavicula) sp." = Eonavicula
"Arca (Eonavicula) sp." = Eonavicula Arkell 1929 clam
 Myalinida - Kolymiidae
"Parainoceramus sp." = Kolymia
"Parainoceramus sp." = Kolymia clam
 Myalinida - Inoceramidae
Pseudomytiloides sp. Koschelkina 1963 clam
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop
 Pectinida -
"Entolium corneolum" = Entolium (Entolium) corneolum
"Entolium corneolum" = Entolium (Entolium) corneolum Young and Bird 1828 scallop
 Pholadida - Pleuromyidae
Pleuromya sp. Agassiz 1845 clam
 Cardiida - Cardiidae
 Pholadomyida - Pholadomyidae
 Trigoniida - Myophorelloidae
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
 Ichnofossils -
Zoophycos sp. Massalongo 1855
Chondrites sp. von Sternberg 1833