Bed A - Bur Naag [Ghibirti Fm] (Miocene of Somalia)

Also known as Loc. 12

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 Bed A, near middle of section.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone

• ENVIRONMENT: Shallow subtidal carbonate environment.
• SPECIFIC LITHOLOGY: Calcari marnosi firabili. 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 78901: 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.
 Orbitoidacea - Lepidocyclinidae
 Pectinida - Pectinoidae
Spondylus decussatus Fuchs 1879 scallop
Chlamys sp. Röding 1798 scallop
 Ostreida - Gryphaeidae
"Ostrea hyotis" = Hyotissa hyotis
"Ostrea hyotis" = Hyotissa hyotis Linnaeus 1758 Honeycomb Oyster
 Carditida - Carditidae
Cardita sp. Bruguière 1792 clam
 Pholadida - Teredinidae
"Kuphus cf. polythalamius" = Kuphus polythalamia
"Kuphus cf. polythalamius" = Kuphus polythalamia Linnaeus 1767 clam
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Naticoidea - Naticidae
Natica sp. Scopoli 1777 moon snail
 Tonnoidea - Cassidae
Cassis sp. Scopoli 1777 snail