Bed 91 (Jurassic of Iraq)

Where: Zakho, Iraq (37.0° N, 43.4° E: paleocoordinates 9.4° N, 37.9° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Durangites ammonoid zone, Chia Gara Formation, Late/Upper Tithonian (150.8 - 145.0 Ma)

• Total thickness 232.4 meters

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary limestone and shale

Size class: macrofossils

Preservation: cast

Collection methods: quarrying,

Primary reference: M. K. Howarth. 1992. Tithonian and Berriasian ammonites from the Chia Gara Formation in northern Iran. Palaeontology 35(3):597-655 [A. Rojas/A. Rojas/A. Rojas]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 192420: authorized by Alexis Rojas, entered by Alexis Rojas on 02.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
  -
Lamellaptychus sp. Trauth 1927 ammonoid aptychus
 Ammonitida - Protancyloceratidae
Cochlocrioceras turriculatum Spath 1950 ammonite
Protancyloceras aff. gracile Oppel 1865 ammonoid
Protancyloceras kurdistanense Spath 1950 ammonoid
 Ammonitida - Olcostephanidae
 Ammonitida - Perisphinctidae
 Ammonitida - Haploceratidae
Pseudolissoceras zitteli Burckhardt 1903 ammonite
 Ammonitida - Oppeliidae
Glochiceras ? spp. Hyatt 1900 ammonite