Corehole DH-18, sample R3722 C (Paleocene of Pakistan)

Where: Sindh, Pakistan (25.1° N, 68.1° E: paleocoordinates 8.7° S, 57.4° E)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Sohnari Formation (Ranikot Group), Paleocene (66.0 - 56.0 Ma)

Environment/lithology: marine; shale and sandstone

• In outcrop, the Sohnari is mainly ferruginous clay and sandstone, but in the subsurface it is mainly carbonaceous shale, sandstone, and coal.

Size class: microfossils

Preservation: original sporopollenin

Collected by GPS and USGS

Collection methods: core

• Investigation by the Geological Survey of Pakistan (GPS) and the U.S. Geological Survey (USGS).

•

•"The samples were processed using normal palynological techniques of HCl; HF; HNO3; short centrifugation with soapy water to remove fines; heavy liquid separation using a ZnCl2 liquid of 1.8 s.g.; staining with Bismarck brown; and screening on 10 µm sieves. Thes residues were mounted in glycerine jelly."

Primary reference: N. Frederiksen. 1990. Palynological contribution to geologic mapping of coal-bearing upper Paleocene rocks in the lower Indus coal region, Pakistan. Open-File Report 90-243:43more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 237185: authorized by Phillip Jardine, entered by Hannah Morck on 26.11.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Incrotonipollis neyvelii, Normapolles " C sp. A" n. gen., "Myricaceoipollenites" "dubius"
Angiospermae
 Mesangiosperms - Araceae
Proxapertites assamicus, Proxapertites operculatus
Proxapertites operculatus Van der Hammen 1956
 Proteales -
Triatriopollenites "sp. A"
Triatriopollenites "sp. A" Thomson and Pflug 1953
 Gentianales - Apocynaceae
Cricotriporites "sp. A"
Cricotriporites "sp. A" Leidelmeyer 1966 dogbane