Ankozany, Sakamena sediments of the Majunga Basin, Madagascar Early Triassic (Triassic of Madagascar)

Where: Madagascar (14.6° S, 48.2° E: paleocoordinates 45.2° S, 39.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nammalian (252.2 - 247.2 Ma)

• Stage: Nammalian = Induan = Olenekian = Smithian = Dienerian

• group-level stratigraphic resolution

Environment/lithology: lagoonal; black, gray, sandy shale

• From Early Permian times onwards, continental sedimentation was repeatedly influenced or interrupted by marine ingressions documented by the presence of brackish water horizons and shallow marine deposits.

•The lower and middle part of the Sakamena section is a black argillaceous shale which contains nodules and a few thin sandstone beds. Above an unexposed interval a grey sandy shale occurs immediately below the Isalo sandstone.

•Deposition of the Sakamena shale occurred probably in a lagoonal or tidal flat environment.

Size class: microfossils

Collection methods: chemical, mechanical,

Primary reference: O. Hankel. 1993. Early Triassic plant microfossils from Sakamena sediments of the Majunga Basin, Madagascar. Review of Palaeobotany and Palynology 77:213-233 [C. Looy/W. Puijk/W. Puijk]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 31351: authorized by Cindy Looy, entered by Wilma Puijk on 08.05.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Schizosporis
  -
Schizosporis spp. Cookson and Dettmann 1959
Charophyceae
  - Zygnemataceae
Tetraporina sp. Naumova 1950
Pinopsida
 Pinales - Podocarpaceae
Cycadopites
  -
Cycadopites follicularis Wilson and Webster 1946
Pteridopsida
 Gleicheniales - Matoniaceae
Dictyophyllidites mortonii Playford and Dettmann 1965
  -
Lycopsida
  -
  - Selaginellaceae
  -
Uvaesporites sp. Döring 1965
Bryopsida
  -
 Life -
Veryhachium sp. Deunff 1954 acritarcs
Leiosphaeridia spp. Eisenack 1958 acritarcs
Striatopodocarpites
  -
 Gymnospermophyta -
Alisporites spp. Daugherty 1941
Aratrisporites
  -
Aratrisporites spp. Leschik 1956
Lundbladispora
  -
Pinidae
 Cupressales - Pinidae
Punctatisporites
  -