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