Loc. 20 - Hab Chowki (Gaj Fm) (Miocene of Pakistan)

Where: Pakistan (25.0° N, 66.9° E: paleocoordinates 19.3° N, 66.3° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Gaj Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From Gaj Fm, which conformably overlies the Nari Fm (Oligocene), and is unconformably overlain by the Nagri Fm (Late Miocene-Early Pliocene). THICKNESS: Ranges between 615-1384 m. AGE: Iqbal (1980) is inconsistent in stating age, with Late Miocene in text, but Early Miocene (Aquitanian) in figures. An Early Miocene age is assigned. STRATIGRAPHIC POSITION: Unknown position within Gaj Fm.

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, ferruginous, gypsiferous, brown, gray, green, red, argillaceous, sandy shale

• ENVIRONMENT: Shallow marine siliciclastic on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Shale, with subordinate sandstone and limestone. Shale is olive green, greenish-grey, purple, red, and brown, soft, clayey, partly gypsiferous, in places sandy and nodular. LITHIFICATION: Poorly lithified, on the basis of facies description.

Size class: macrofossils

Collected by Iqbar in 1966

Collection methods: surface (in situ),

• COLLECTOR: M. W. A. Iqbar (1966). REPOSITORY: Geological Survey of Pakistan.

Primary reference: M. W. A. Iqbal. 1980. Oligo-Miocene bivalves and gastropods from Kirthar Province, lower Indus Basin, Pakistan. Records of the Geological Society of Pakistan 51:1-59 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 77457: authorized by Austin Hendy, entered by Austin Hendy on 12.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropod and bivalvia. NOMENCLATURE: Authoritative publication with relatively modern nomenclature, and consistent subgenus and species-resolution identifications.
 Pectinida - Pectinoidae
Pecten (Amussiopecten) labadyei d'Archaic and Haime 1853 scallop
 Ostreida - Ostreidae
Ostrea latimarginata Vredenburg 1908 oyster
 Cardiida - Veneridae
"Venus (Antigona) mekranica" = Venus mekranica
"Venus (Antigona) mekranica" = Venus mekranica Vredenburg 1928 venus clam
 Architaenioglossa - Ampullinidae
Globularia cf. gibberosa Grateloup 1847 snail
 Neogastropoda - Olividae
"Ancilla (Sparella) indica" = Ancilla indica, Oliva (Strephona) australis
"Ancilla (Sparella) indica" = Ancilla indica Vredenburg 1925 olive snail
Oliva (Strephona) australis Duclos 1835 olive snail
 Neogastropoda - Volutidae
"Volutospina sindiensis" = Athleta (Volutospina) sindiensis, "Lyria cf. jugosa" = Lyria (Harpeola) jugosa
"Volutospina sindiensis" = Athleta (Volutospina) sindiensis Vredenburg 1925 volute
"Lyria cf. jugosa" = Lyria (Harpeola) jugosa Sowerby 1839 volute
 Neogastropoda - Conidae
Conus (Lithoconus) ineditus Michelotti 1861 cone shell