Lockhart Limestone (Paleocene of Pakistan)

Where: Pakistan (32.4° N, 70.5° E: paleocoordinates 1.5° N, 63.7° E)

• coordinate stated in text

• local area-level geographic resolution

When: Lockhart Limestone Formation, Late/Upper Paleocene (58.7 - 55.8 Ma)

• STRATIGRAPHIC RELATIONS: From the Lockhart Limestone, which conformably overlies the Hangu Shale (Early Paleocene) and is conformably overlain by the Patala Formation (Paleocene). THICKNESS: 70 m at type section, ranging from 6 to 70 m throughout range. AGE: Paleocene in text. Assigned by enterer to a Late Paleocene age on the basis of stratigraphic position, in overlying the Hangu Shale (Early Paleocene). STRATIGRAPHIC POSITION: Collection is presumably a composite from the entire formation.

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; gray, blue limestone

• ENVIRONMENT: not reported in text, but from carbonate facies and appears to be rather shallow water on the basis of faunal composition.
• SPECIFIC LITHOLOGY: Grey to bluish grey, mostly massive limestone with subordinate medium to thick bedding. LITHIFICATION: Lithified, assumed on the basis of facies description.

Size class: macrofossils

Collection methods: COLLECTORS: Not stated, but probably Davies or Pinfold (1930's). REPOSITORY: Not stated, but possibly BMNH or Geological Survey of India.

Primary reference: S. M. I. Shah. 1980. Stratigraphy and economic geology of Central Salt Range. Records of the Geological Survey of Pakistan 52:1-104 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 77279: authorized by Austin Hendy, entered by Austin Hendy on 08.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Probably limited, but including characteristic gastropoda and bivalvia. NOMENCLATURE: Relatively modern nomenclature, with species-resolution assignments.
unclassified
  -
Foraminifera
 Orbitoidacea - Lepidocyclinidae
 Nummulitacea - Nummulitidae
 Nummulitacea - Discocyclinidae
 Rotaliacea - Rotaliidae
Tubothalamea
 Miliolida - Alveolinidae
Gastropoda
 Cerithioidea - Cerithiidae
 Neogastropoda - Volutidae
Gosavia humberti d'Archaic and Haime 1854 volute
Lyria cf. punjabensis Eames 1952 volute
 Sorbeoconcha - Xenophoridae
Xenophora sp. Fischer von Waldheim 1807 carrier shell
 Sorbeoconcha - Strombidae
Tibia cf. pseudomokattamensis Eames 1952 true conch
Rimella cf. prestwichi d'Archaic and Haime 1854 true conch
 Sorbeoconcha - Naticidae
Euspirocrommium cf. conicum Cox 1930 moon snail