Chatti Mudstone (Pliocene of Pakistan)

Where: Pakistan (25.3° N, 62.1° E: paleocoordinates 24.3° N, 61.4° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Chatti Mudstone Formation, Pliocene (5.3 - 2.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Chatti Mudstone, which conformably overlies the Talar Sandstone, and is unconformably overlain by the Ormara Fm. THICKNESS: As much as 4000 ft. AGE: Pliocene, based on faunal affinity. STRATIGRAPHIC POSITION: A composite list for the entire formation.

• formation-level stratigraphic resolution

Environment/lithology: coastal; unlithified, fine-grained, silty, sandy mudstone

• ENVIRONMENT: Marine, according to text. From siliciclastic facies and apparently shallow shelf depths on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Mudstone, interbedded with siltstone or fine-grained sandstone, and marl. Mudstone is poorly bedded, soft, and easily eroded. LITHIFICATION: Unlithified, 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 77293: 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, and foraminifera.
 Nummulitacea - Nummulitidae
 Rotaliina - Cassidulinidae
 Buliminacea - Uvigerinidae
 Buliminacea - Buliminidae
 Discorbacea - Bagginidae
Cancris cf. auriculus Fichtel and Moll 1798
 Rotaliacea - Rotaliidae
 Nonionacea - Nonionidae
 Rotaliina - Bolivinidae
 Globigerinaceae - Globigerinidae
 Globigerinaceae - Globorotaliidae
 Textulariacea - Textulariidae
 Nodosariacea - Polymorphinidae
 Nodosariacea - Nodosariidae
Nodosaria sp. Lamarck 1812
Robulus sp. Montfort 1808
Robulus "sp. B" Montfort 1808
Robulus "sp. C" Montfort 1808
 Arcida - Arcidae
 Arcida - Glycymerididae
 Arcida - Noetiidae
"Fossularca (Noetia) pectenculiformis" = Noetia
"Fossularca (Noetia) pectenculiformis" = Noetia clam
 Pectinida - Pectinoidae
 Cardiida - Veneridae
Hemitapes cpr venus clam
Timoclea scabra venus clam
Gafrarium divaricatum Gmelin 1791 venus clam
"Dosinia (Sinodia) globa" = Sinodia venus clam
 Cardiida - Cardiidae
"Cardium melvilli" = Cardium (Laevicardium) melvilli
"Cardium melvilli" = Cardium (Laevicardium) melvilli Newton 1905 cockle
 Neogastropoda - Muricidae
Cymia carinifera Lamarck 1822 murex snail
 Sorbeoconcha - Potamididae