Petruny MS Thesis TDP Site 30 (Cretaceous to of Tanzania)

Where: Lindi, Tanzania (10.1° S, 39.6° E: paleocoordinates 29.2° S, 29.2° E)

• coordinate stated in text

When: H. helvetica & W. archaeocretacea foram zone, Lindi Formation (Kilwa Group), Early/Lower Turonian to Early/Lower Turonian (93.5 - 89.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified claystone and lithified, sandy siltstone

• The main lithologies from 4.65 m (core TDP30/3) to the bottom of the hole are mm- to cm-thick, interbedded, olive black claystones and sandy siltstones (Figs. 7c and 8), with common occurrence of finely-laminated intervals throughout. Olive black,well-lithified, quartz-cemented siltstone layers are observed at the bottom of cores TDP30/21 and 42 (Fig. 7d and f), whereas light

•gray, thin sandstone partings are rare in this hole. Sulfate–carbonate vein fractures are sporadically present, while yellowish brown, mm- to cm-sized sand nodules and small shell debris (e.g., bivalves, inoceramids and gastropods) ccur relatively often. Soft-sediment deformation, such as slightly inclined and convoluted laminations, is observed in parts of cores TDP30/16, 19–20,

•22–27, 31–34 and 42 (Fig. 8). Also, highly disturbed lamination, as evidence of intense soft-sediment deformation, occurs in parts of cores TDP30/13, 15–19, 20 and 34.

Size class: microfossils

Preservation: original calcite, replaced with calcite

Collected by Tanzania Drilling Project Expedition in 2008; reposited in the UNSM

Collection methods: bulk, core, smear slide,

Primary reference: À J. Berrocoso, B. T. Huber, K. G. MacLeod, M. R. Petrizzo, J. A. Lees, I. Wendler, H. Coxall, A. K. Mweneinda, F. Falzoni, H. Birch, J. M. Singano, S. Haynes, L. Cotton, J. Wendler, P. R. Bown, S. A. Robinson, and J. Gould. 2012. Lithostratigraphy, biostratigraphy and chemostratigraphy of Upper Cretaceous and Paleogene sediments from southern Tanzania: Tanzania Drilling Project Sites 27-35. Journal of African Earth Sciences 70:36-57 [M. Uhen/L. Petruny]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 179313: authorized by Mark Uhen, entered by Loren Petruny on 11.06.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Haplophragminids spp., Trochamminids spp., Tubular agglutinates
Nodosariata
 Robertinida - Epistominidae
Epistomina spp.
 Polymorphinida - Polymorphinidae
Ramulina sp.
 Nodosariida - Nodosariidae
Nodosaria sp.
Nodosaria sp. Lamarck 1812
 Vaginulinida - Vaginulinidae
Lenticulina spp.
Lenticulina spp. Lamarck 1804
Globothalamea
 Rotaliida - Cancrisidae
Gyroidinoides spp.
Gyroidinoides spp. Reiss 1963
 Rotaliida - Discorbidae
Eponides sp.
Eponides sp. Montfort 1808
 Rotaliida - Gavelinellidae
Lingulogavelinella convexa
Tubothalamea
 Miliolida - Hauerinidae
Pseudosigmoilina spp.
Foraminifera
 Globigerinina - Hedbergellidae
Helvetoglobotruncana helvetica, Praeglobotruncana spp.
 Lituolida - Lituolidae
Dorothia oxycona
 Rotaliina - Turrilinidae
Praebulimina sp.
Praebulimina sp. Hofker 1953
 Ammodiscoidea - Ammodiscidae
Ammodiscus sp.
Ammodiscus sp. Reuss 1862
 Globigerinaceae - Marginotruncanidae
Whiteinella aprica, Whiteinella spp., Whiteinella archaeocretacea
Whiteinella spp. Pessagno 1967
 Globigerinaceae - Globotruncanidae
"Marginotruncana renzi" = Globotruncana renzi, Marginotruncana paraconcavata, Dicarinella hagni
"Marginotruncana renzi" = Globotruncana renzi Thalmann 1942