Petruny MS Thesis TDP Site 34 (Cretaceous to of Tanzania)

Where: Lindi, Tanzania (10.0° S, 39.6° E: paleocoordinates 29.1° S, 29.2° E)

• coordinate stated in text

When: Helvetoglobotruncana 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; lithified, graded, nodular, sandy siltstone

• The main lithologies from 8 m to the bottom of the hole are

•mm- to cm-thick, interbedded, olive gray, olive black and greenish

•black, claystones and sandy siltstones (Figs. 7g and 13), in which finely-laminated, possibly organic-rich intervals occur commonly.

•Cores TDP34/8, 10, 23, 24, 28, 29, 39 and 46 show cm-thick layers

•of light to medium gray, massive, lithified siltstones (Figs. 7g and

•13), with sharp to gradational top and bottom contacts. Light gray,

•thin sandstone partings are rare in this hole. Yellowish brown,

•mm- to cm-sized sand nodules and fragments of inoceramid shells

•are relatively common. Soft-sediment deformation (slightly inclined

•and convoluted laminations) is observed at intervals from

•cores TDP34/16–17, 33–38 and 41–44. Lamination is highly disturbed

•in parts of cores TDP34/36–37 (Figs. 7h and 13).

Size class: microfossils

Preservation: original calcite

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

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 179309: 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
Nodosariata
 Polymorphinida - Polymorphinidae
Ramulina sp.
 Nodosariida - Nodosariidae
Astacolus sp., Dentalina sp., Nodosaria sp., Frondicularia sp.
Astacolus sp. de Montfort 1808
Dentalina sp. d'Orbigny 1826
Nodosaria sp. Lamarck 1812
Frondicularia sp. Defrance 1824
 Robertinida - Epistominidae
Epistomina spp.
 Vaginulinida - Vaginulinidae
Saracenaria sp., Lenticulina spp.
Saracenaria sp. Defrance 1824
Lenticulina spp. Lamarck 1804
Globothalamea
 Rotaliida - Gavelinellidae
Berthelina berthelini, Gavelinella spp., Lingulogavelinella convexa, Stensioeina sp.
Gavelinella spp. Brotzen 1942
Stensioeina sp. Brotzen 1936
 Rotaliida - Quadrimorphinidae
Quadrimorphina sp.
Quadrimorphina sp. Finlay 1939
 Rotaliida - Cancrisidae
Gyroidinoides spp.
Gyroidinoides spp. Reiss 1963
 Rotaliida - Discorbidae
Eponides sp.
Eponides sp. Montfort 1808
 Rotaliida - Eouvigerinidae
Tappanina laciniosa
Foraminifera
 Globigerinaceae - Marginotruncanidae
Whiteinella archaeocretacea
 Globigerinaceae - Heterohelicidae
Spiroplectinata sp.
Spiroplectinata sp. Cushman 1927
Tubothalamea
 Miliolida - Hauerinidae
Pseudosigmoilina sp.
unclassified
  -
"agglutinated trochospiral" spp., "agglutinated planispiral" spp., "agglutinated tubular" spp., "Buliminid" spp.
Foraminifera
  -
Colomia ? sp.
 Ammodiscoidea - Ammodiscidae
Ammodiscus sp., Glomospira sp.
Ammodiscus sp. Reuss 1862
Glomospira sp. Rzehak 1895
 Globigerinina - Rotaliporidae
Rotalipora spp.
Rotalipora spp. Brotzen 1942
 Globigerinina - Hedbergellidae
Helvetoglobotruncana helvetica, Helvetoglobotruncana praehelvetica
  -
"Marginulina sp." = Cristellaria (Marginulina)
"Marginulina sp." = Cristellaria (Marginulina) d'Orbigny 1826
 Lituolida - Lituolidae
Gaudryina sp., Dorothia oxycona
Gaudryina sp. d'Orbigny 1839
Coccolithophyceae
 Braarudosphaerales - Polycyclolithaceae
Quadrum gartneri
Quadrum gartneri Prins and Perch-Nielsen 1977