Where: Iran (37.3° N, 44.9° E: paleocoordinates 31.2° N, 41.0° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: P20 foram zone, Qom Formation, Rupelian (33.9 - 28.1 Ma)
• formation-level stratigraphic resolution
Environment/lithology: marine; limestone
•limestones. The larger foraminiferal assemblage is gradually dominated by hyaline forms belonging to Nummulites cf. fichteli, Michelotti 1841 (Plate I, Figure 1); Nummulites cf. vascus, Joly & Leymeri 1848 (Plate I, Figures 3 & 4); Neorotalia lithothamnica (Uhlig 1886) (Plate I, Figures 9 & 10); Operculina complanata (Defrance 1822) (Plate I, Figure 5); Heterostegina sp. (Plate I, Figure 2); Asterigerina sp. (Plate I, Figure 12); Planorbulina bronnimanni, Bignot & Decrouez 1982 (Plate I, Figures 8 & 13); Planorbulina sp., (Plate I, Figure 7); Victoriella conoidea (Rutten 1914) (Plate I, Figure 6) and Halkyardia minima, (Liebus 1911) (Plate I, Figure 11). The coralline alga Subterraniphyllum thomasii, Elliott 1957 (Plate II, Figure 13); red algal
•and coral fragments also coexist. The carbonate strata are topped by calcareous marls and argillaceous limestones. This interval is enriched by planktonic foraminifera including Turborotalia ampliapertura (Bolli 1957), Globigerina praebulloides, Blow 1959, Globigerina tripartita, Koch 1926, Paragloborotalia nana (Bolli 1957), Subbotina yeguaensis (Weinzierl & Applin 1929) and Chiloguembelina cubensis (Palmer 1934). Finally, the section is overlain by a polymictic conglomerate with an erosional base.
Size class: microfossils
Primary reference: M. Yazdi-Moghadam. 2011. Early Oligocene Larger Foraminiferal Biostratigraphy of the Qom Formation, South of Uromieh (NW Iran). Turkish Journal of Earth Sciences 20(6):847-856 [M. Uhen/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 138868: authorized by Mark Uhen, entered by Mark Uhen on 30.01.2013, edited by Mihaela Krause
Creative Commons license: CC BY (attribution)
Taxonomic list
Florideophyceae | |
Spongites "sp. 1", ? Spongites cf. personatus, Lithoporella minus, Lithoporella melobesioides, ? Hydrolithon lemoinei, Titanoderma pustulatum, Polystrata alba, Subterraniphyllum thomasii, Chamberlainoideae indet.
Spongites "sp. 1" Kützing 1841
? Spongites cf. personatus Airoldi 1932
Lithoporella minus Johnson 1964
Lithoporella melobesioides Foslie 1909
? Hydrolithon lemoinei Miranda 1935
Titanoderma pustulatum Lamouroux 1816
Polystrata alba Pfender 1936
Subterraniphyllum thomasii Elliott 1957
Chamberlainoideae indet. Caragnano 2018 | |
Lithothamnion cf. giammarinoi Fravega et al. 1993 | |
Sporolithon "sp. 1" Rothpletz 1891
Sporolithon "sp. 2" Rothpletz 1891
Sporolithon airoldii Vannucci et al. 2010 | |
Foraminifera | |
Turborotalia ampliapertura Bolli 1957 | |
Heterostegina sp. d'Orbigny 1826
Nummulites sp. Lamarck 1801 | |
Neorotalia sp. Bermúdez 1952 | |
Planorbulina sp. d'Orbigny 1826 | |
Tubothalamea | |
Borelis sp. Montfort 1808 | |
Praerhapydionina delicata Henson 1950 | |
Penarchaias sp. Hottinger 2007
Penarchaias glynnjonesi Henson 1950
Spirolina sp. Lamarck 1804
Dendritina sp. d'Orbigny 1826
Dendritina cf. rangi dOrbigny 1904 | |
Triloculina sp. d'Orbigny 1826
Triloculina trigonula Lamarck 1804 | |
Foraminifera | |
Globothalamea | |
Asterigerinoidea indet. d'Orbigny 1839 | |
Sphaerogypsina sp. Galloway 1933 | |
Foraminifera | |
Peneroplis sp. Montfort 1808
Peneroplis thomasi Henson 1950 |