Petruny MS Thesis TDP Site 23 (Cretaceous of Tanzania)

Where: Lindi, Tanzania (10.0° S, 39.7° E: paleocoordinates 26.9° S, 31.0° E)

• coordinate stated in text

When: Nangurukuru Formation (Kilwa Group), Late/Upper Campanian (83.5 - 70.6 Ma)

Environment/lithology: offshore; lithified, bioturbated, muddy, calcareous siltstone and lithified, silty sandstone

• The principal lithologies from the surface to 64.10 m are pale blue to grayish blue-green, massive, calcareous claystones with relatively common small bioturbation mottling and bioclasts. The interval from 57.10 m to 64.10 m presents significant cementation as well as frequent layers (1–10 cm thick) of light gray, medium- to fine-grained, massive sandstones with sharp, irregular contacts (Fig. 5i). On the other hand, the bottom of the

•hole (64.10–90.70 m) consists of greenish gray and light bluish gray, weakly-bedded, massive siltstones–sandy siltstones, where mm- to cm-sized, bioturbation burrows are relatively abundant. These burrows are mostly elongate or oval and bedding-parallel, but simple sub-vertical burrows are also present. Small bioclasts are common in this interval.

Size class: microfossils

Preservation: original calcite, replaced with calcite

Collected by Tanzania Drilling Project Expedition in 2007; reposited in the USNM

Collection methods: core, smear slide,

Primary reference: Á J. Berrocoso, K. G. MacLeod, B. T. Huber, J. A. Lees, I. Wendler, P. R. Bown, A. K. Mweneinda, C. I. Londoño, and J. M. Singano. 2010. Lithostratigraphy, biostratigraphy and chemostratigraphy of Upper Cretaceous sediments from southern Tanzania: Tanzania drilling project sites 21-26. Journal of African Earth Sciences 57:47-69 [M. Uhen/L. Petruny]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 179879: authorized by Mark Uhen, entered by Loren Petruny on 03.07.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Coccolithophyceae
 Braarudosphaerales - Polycyclolithaceae
Uniplanarius sissinghii, Uniplanarius trifidus
Uniplanarius sissinghii Perch-Nielsen 1986
Uniplanarius trifidus Stradner 1961
Foraminifera
  -
Radotruncana calcarata
 Globigerinaceae - Globotruncanidae
Globotruncanita ventricosa, Globotruncanita elevata, Globotruncana ventricosa