Loc. 12 -Ghibirti Fm (erratic specimens) (Miocene of Somalia)

Where: Somalia (10.8° N, 51.1° E: paleocoordinates 10.1° N, 48.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ghibirti Formation (Hafún Group), Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Ghibirti Fm [enterers usage] of the Hafún Series [group?] of Early Miocene, and presumably regionally overlies the Tavo Fm [enterers usage] (Late Oligocene) and is overlain by the Naag Fm [enterers usage] (Early Miocene). THICKNESS: Difficult to ascertain, but a bed of not great thickness. AGE: Early Miocene, equivalent to Aquitanian and lower Gaj according to author on the basis of larger formaniferal and molluscan biostratigraphy. STRATIGRAPHIC POSITION: From floating specimens in section.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified lithology not reported

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

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Facca & Marchesini in 1938-1939

• COLLECTOR: Collected by G. Facca and E. Marchesini, 1938-1939. REPOSITORY: Museo dell' Istituto Geologico dell' Universitá 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 78905: authorized by Austin Hendy, entered by Austin Hendy on 19.02.2008

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.
Gastropoda
 Architaenioglossa - Ampullinidae
Ampullonatica sp. Sacco 1890 snail
 Neogastropoda - Conidae
"Conus cf. brevis" = Conus (Lithoconus) brevis
"Conus cf. brevis" = Conus (Lithoconus) brevis Sowerby 1840 cone shell
 Sorbeoconcha - Xenophoridae
Xenophora deshayesi Michelotti 1847 carrier shell
Bivalvia
 Ostreida - Gryphaeidae
"Ostrea hyotis" = Hyotissa hyotis
"Ostrea hyotis" = Hyotissa hyotis Linnaeus 1758 Honeycomb Oyster
 Arcida - Arcidae
"Arca (Barbatia) sp." = Barbatia
"Arca (Barbatia) sp." = Barbatia Gray 1842 clam
Anthozoa
 Scleractinia - Siderastreidae
Siderastrea siderea Ellis and Solander 1786 stony coral