Petruny MS Thesis TDP Site 21 (Cretaceous to of Tanzania)

Where: Lindi, Tanzania (10.0° S, 39.6° E: paleocoordinates 30.1° S, 28.9° E)

When: Lindi Formation (Kilwa Group), Late/Upper Cenomanian to Late/Upper Cenomanian (99.6 - 89.3 Ma)

Environment/lithology: offshore; lithified, silty claystone

• The dominant lithologies from the surface to 39.97 m are medium to dark bluish gray, massive, silty claystones (Figs. 4, 5g, h), with faintly laminated intervals from 23.10 m to 35.10 m (see Section 5 and Table 10). A faulted segment is inferred from 20.10 m to 21.28 m (top of core TDP21/9) based on the presence of brown, massive claystones, whose color is ascribed to flow of oxidizing fluids. The interval from 39.97 m to the bottom of the hole contains light gray, massive- to normally-graded, fine- to medium-grained sandstones. Coarse-grained sandstones with normal gradation and matrix-supported, conglomeratic bases, with subangular to rounded pebbles, are also found from 44.10 m to 53.31 m (Figs. 4, 5a). Changes in the dip angle of the bedding planes and soft-sediment deformation are evident at several horizons from 41.10 m to 55.62 m. Small burrows and shell bioclasts are sporadically present.

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 Jiménez 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 179874: 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
Foraminifera
 Globigerinoidea - Globigerinidae
Subbotina patagonica
 Globigerinina - Hedbergellidae
Hedbergella simplex, Helvetoglobotruncana helvetica, Praeglobotruncana gibba
 Globigerinina - Truncorotaloididae
Morozovella velascoensis, Morozovella subbotinae, Morozovella formosa, Morozovella aequa, Morozovella aragonensis
 Globigerinina - Rotaliporidae
Rotalipora globotruncanoides
 Globigerinaceae - Globotruncanidae
"Marginotruncana coronata" = Globotruncana coronata, Marginotruncana schneegansi, Marginotruncana sinuosa, Marginotruncana pseudolinneiana, Dicarinella hagni, Dicarinella concavata, Dicarinella imbricata, Dicarinella asymetrica
"Marginotruncana coronata" = Globotruncana coronata Bolli 1953
 Globigerinaceae - Marginotruncanidae
Whiteinella aumulensis, Whiteinella aprica, Whiteinella praehelvetica, Whiteinella brittonensis, Whiteinella archaeocretacea
Whiteinella brittonensis Loeblich and Tappan 1961
Coccolithophyceae
 Podorhabdales - Cretarhabdaceae
Helenea chiastia
Helenea chiastia Worsley 1971
 Eiffellithales - Eiffellithaceae
Eiffellithus eximius
 Prymnesiophycidae - Prymnesiophycidae
Lithraphidites septenarius
 Braarudosphaerales - Polycyclolithaceae
Quadrum gartneri, Micula staurophora
Quadrum gartneri Prins and Perch-Nielsen 1977
Micula staurophora Gardet 1955 coccolithophore