Isfahan Province, Bagher Abad village, Howz-e-Khan Member (Triassic of Iran)

Where: Isfahan, Iran (33.1° N, 52.0° E: paleocoordinates 29.4° N, 40.0° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Nayband Formation, Norian (228.0 - 208.5 Ma)

• the Triassic deposits are overlain with a distinct angular unconformity by the Lower Cretaceous deposits, whereas Jurassic sediments are missing almost completely. The unit of conglomerate at the base of the Lower Cretaceous contains pebbles of carbonate and siliciclastic rocks without any sign of the Jurassic fossils.

• member-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone

• 15 m thick, starts with a thick limestone bed. It contains abundant reef building organisms, as well as reef dwellers represented by echinoderms, bivalves, brachiopods and gastropods.

Size classes: macrofossils, mesofossils

Primary reference: M. Mannani and M. Yazdi. 2009. Late Triassic and Early Cretaceous sedimentary sequences of the northern Isfahan Province (Central Iran): stratigraphy and paleoenvironments. Boletín de la Sociedad Geológica Mexicana 61(3):367-374 [W. Kiessling/M. Krause]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 138967: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 05.02.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Prosobranchia - Protorculidae
 Littorinoidea - Purpurinidae
 Sorbeoconcha - Cryptaulacidae
Cryptaulax inaequelineata Nützel and Senowbari-Daryan 1999 snail
 Scleractinia - Reimaniphylliidae
Oedalmia norica Frech 1890 stony coral
Distichophyllia cf. norica Frech 1890 stony coral
Retiophyllia norica Frech 1890 stony coral
Cuifia gigantella stony coral
Cuifia columnaris Roniewicz 1995 stony coral
 Scleractinia - Margarophylliidae
Distichomeandra austriaca Frech 1890 stony coral
 Scleractinia - Pamiroseriidae
Crassistella juvavica Frech 1890 stony coral