Petruny MS Thesis TDP Site 29 (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 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; claystone

• The principal lithologies from 20 m (core TDP29/10) to the bottom of the hole are olive gray to olive black, massive to slightlybedded, silty claystones (Fig. 6). A few intervals (mm to cm thick) with waxy, possibly organic-rich, darker claystones occur in cores TDP29/16 and 18. Sub-horizontal and cross-cutting sulfate–carbonate veins are only locally observed, as well as yellowish brown,mm- to cm-sized sand nodules. Cores TDP29/12 and 20 present a light gray, cm-thick, well-lithified, carbonate-cemented siltstone layer (Figs. 6, 7a and b), with sharp top and basal contacts. Bivalve shell debris is sporadically present in cores TDP29/13 and 15–17.

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,

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 179312: 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
  -
Agglutinated spp., Branching rhabdamminids
Foraminifera
 Globigerinina - Hedbergellidae
Helvetoglobotruncana helvetica, Helvetoglobotruncana praehelvetica
 Trochamminacea - Trochamminidae
Trochamminidae spp.
Trochamminidae spp. Schwager 1877
 Ammodiscoidea - Ammodiscidae
Ammodiscus sp., Glomospira sp.
Ammodiscus sp. Reuss 1862
Glomospira sp. Rzehak 1895
 Lituolida - Haplophragmoididae
Haplophragmoididae spp.
 Lituolida - Lituolidae
Dorothia oxycona
  -
"Marginulina sp." = Cristellaria (Marginulina)
"Marginulina sp." = Cristellaria (Marginulina) d'Orbigny 1826
Globothalamea
 Rotaliida - Discorbidae
Eponides sp.
Eponides sp. Montfort 1808
 Rotaliida - Cancrisidae
Gyroidinoides spp.
Gyroidinoides spp. Reiss 1963
 Rotaliida - Gavelinellidae
Berthelina berthelini, Lingulogavelinella convexa, Gavelinella sp.
Gavelinella sp. Brotzen 1942
Foraminifera
 Rotaliina - Turrilinidae
Praebulimina sp.
Praebulimina sp. Hofker 1953
Tubothalamea
 Miliolida - Hauerinidae
Pseudosigmoilina spp.
Nodosariata
 Vaginulinida - Vaginulinidae
Lenticulina spp.
Lenticulina spp. Lamarck 1804
 Robertinida - Epistominidae
Epistomina spp.
 Nodosariida - Nodosariidae
Dentalina sp.
Dentalina sp. d'Orbigny 1826
Foraminifera
 Globigerinaceae - Globotruncanidae
Dicarinella hagni, Dicarinella paraconcavata
 Globigerinaceae - Marginotruncanidae
Whiteinella spp., Whiteinella aprica, Whiteinella archaeocretacea, Whiteinella brittonensis
Whiteinella spp. Pessagno 1967
Whiteinella brittonensis Loeblich and Tappan 1961