Loc. 97 - Dubar Fm (Miocene of Somalia)

Where: Somalia (11.2° N, 49.0° E: paleocoordinates 10.8° N, 47.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Dubar Formation (Guban Group), Middle Miocene (16.0 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Dubar Fm [enterers usage] of the Guban Series [group?], and presumably regionally overlies Early Miocene strata (equivalent to the Naag Fm) and is overlain by the Late Miocene conglomerate. AGE: Middle Miocene, equivalent to Helvacean and lowermost Mekran according to author on the basis of larger formaniferal and molluscan biostratigraphy. Ostrea virleti is indicator for this zone. STRATIGRAPHIC POSITION: From unknown position within section.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, white limestone

• ENVIRONMENT: Shallow subtidal carbonate environment.
• SPECIFIC LITHOLOGY: Calcare marnosi bianco. LITHIFICATION: Lithified on the basis of figured specimens from adjacent beds.

Size class: macrofossils

Collection methods: COLLECTOR: G. Facca, G. Merla, 1938-1939. REPOSITORY: Museo dell' Istituto Geologico dell' Universit√° di Firenze.

Primary reference: A. Azzaroli. 1958. L'Oligocene e il Miocene della Somalia. Stratigrafia, Tettonica, Paleontologia (Macroforaminferi, Coralli, Molluschi). Palaeontolographia Italica 52:1-142 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 79082: authorized by Austin Hendy, entered by Austin Hendy on 24.02.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not exhaustive, but limited to characteristic gastropoda, bivalvia, foraminifera, and anthozoa. NOMENCLATURE: Authoritative publication, but with antiquated nomenclature.
unclassified
  -
Rotaliina
 Orbitoidacea - Lepidocyclinidae
Bivalvia
 Ostreida - Gryphaeidae
"Ostrea virleti" = Hyotissa virleti
"Ostrea virleti" = Hyotissa virleti Deshayes 1832 oyster
 Ostreida - Ostreidae
"Ostrea folium" = Dendostrea folium
"Ostrea folium" = Dendostrea folium Linnaeus 1758 foliate oyster
 Pholadida - Teredinidae
"Kuphus cf. polythalamius" = Kuphus polythalamia
"Kuphus cf. polythalamius" = Kuphus polythalamia Linnaeus 1767 clam
Gastropoda
 Neogastropoda - Turbinellidae
Turbinella sp. Lamarck 1799 snail
 Neogastropoda - Conidae
"Conus cf. brevis" = Conus (Lithoconus) brevis
"Conus cf. brevis" = Conus (Lithoconus) brevis Sowerby 1840 cone shell
 Stromboidea - Strombidae
"Strombus cf. nodosus" = Persististrombus depertitus, "Strombus ? coronatus" = Persististrombus coronatus
"Strombus cf. nodosus" = Persististrombus depertitus Sowerby 1840 true conch
"Strombus ? coronatus" = Persististrombus coronatus Defrance 1827 true conch
 Naticoidea - Naticidae
Natica sp. Scopoli 1777 moon snail
 Cypraeoidea - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry
 Xenophoroidea - Xenophoridae
Xenophora sp. Fischer von Waldheim 1807 carrier shell
 Tonnoidea - Cassidae
Cassidaria ? desori d'Archiac and Haime 1854 snail
Anthozoa
 Scleractinia - Poritidae
Alveopora somaliensis Azzaroli 1958 stony coral
Porites leptoclada Reuss 1871 stony coral
 Scleractinia - Acroporidae
Dendracis bifaria Gregory 1930 stony coral
Astreopora hemisphaerica Duncan 1880 stony coral
 Scleractinia - Merulinidae
Hydnophora solidior Duncan 1880 stony coral
Hydnophora infundibulum n. sp. Azzaroli 1958 stony coral
 Scleractinia - Heliastraeidae
Heliastrea carnegiei Latham 1929 stony coral