Laki Group (Eocene of Pakistan)

Where: Pakistan (27.2° N, 65.7° E: paleocoordinates 0.4° N, 55.6° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Laki Group, Early/Lower Eocene (55.8 - 48.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Laki Group, which unconformably overlies the Ranikot Group (Late Cretaceous-Paleocene), and is conformably overlain by the Tiyon Formation. THICKNESS: Ranges from 400-2000 ft. AGE: Early Eocene (Ypresian). STRATIGRAPHIC POSITION: A composite list for the entire group.

• group-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, shelly/skeletal, brown, gray, yellow reef rocks

• ENVIRONMENT: Shallow marine environment, which favoured the prolific, reefoidal growth of forams, molluscs, echinoderms, coral and other organisms, according to text.
• SPECIFIC LITHOLOGY: Mostly limestone, but also mark, calcareous shale, sandstone, and lateritic clay. Limestone is mostly hard and massive, in hummocky, rough or smooth faced beds up to 20 ft thick. Light-medium gray, light brown, or white. Nearly all beds are rich in fossils. Most limestone is reefoid, and some if it is coralline and brecciated. LITHIFICATION: Lithified, on the basis on facies description.

Size class: macrofossils

Collection methods: COLLECTOR: Not reported in text. REPOSITORY: Not reported in text.

Primary reference: Hunting Survey Corporation, LTD. 1961. Reconnaissance Geology of Part of West Pakistan 1-550 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 77304: authorized by Austin Hendy, entered by Austin Hendy on 08.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia, gastropoda, echinoidea, algae, and foraminifera.
Show authors, comments, and common names
unclassified
  -
Dischoplax biserialis
Echinoidea
 Echinoneoida - Echinoneidae
Amblypygus subrotundus
 Spatangoida - Brissidae
? Metalia sowerbyi
? Metalia sowerbyi heart urchin
 Echinolampadoida - Echinolampadidae
Echinolampas nummulitica
Bivalvia
 Pectinida - Pectinoidae
Chlamys cf. jamensis, "Chlamys cf. senatoria" = Mimachlamys senatoria
"Chlamys cf. senatoria" = Mimachlamys senatoria Gmelin 1791 scallop
 Arcida - Arcidae
"Arca" sp.
"Arca" sp. Linnaeus 1758 ark
 Lucinida - Lucinidae
Anodontia pharaonis
 Cardiida - Glossidae
Blagraveia sindensis
 Cardiida - Chamidae
Chama brimonti
Chama brimonti jewel box
 Cardiida - Cardiidae
? Cardium sp.
? Cardium sp. Linnaeus 1758 cockle
Gastropoda
 Cerithioidea - Cerithiidae
Cerithium sp.
Cerithium sp. Bruguière 1789 cerith snail
 Sorbeoconcha - Naticidae
Natica sp.
Natica sp. Scopoli 1777 moon snail
 Sorbeoconcha - Cypraeidae
Gisortia murchisoni
Gisortia murchisoni d'Archaic and Haime 1854 cowry
 Neogastropoda - Conidae
Conus sp.
Conus sp. Linnaeus 1758 cone shell
 Neritoidea - Neritidae
Velates perversus
Velates perversus Gmelin 1791 snail