Where: Tasmania, Australia (41.1° S, 147.9° E)
• Paleocoordinates: 51.4° S, 155.5° E (Wright 2013)
• coordinate stated in text
When: Lower Proteacidites tuberculatus pollen zone, Late/Upper Oligocene to Late/Upper Oligocene (28.4 - 16.0 Ma)
• The most recent treatment of the age of the sediments has been made by Macphail et al. (1994) who consider them to be Late Oligocene-Early Miocene based on palynological correlation.
•- Overall, the data strongly indicate an Oligocene age for the flora, and possibly Early Oligocene (Wells & Hill, 1989).
Environment/lithology: alluvial fan; claystone
• Pioneer sediments represent a braided fluvial fan which originated from steep slopes to the east and south-east. The fossil-bearing lenses therefore represent areas which were cut off from the main flow resulting in bodies of still water from which fine sediments and plant debris settled. The braided fluvial fan represents a high energy environment and it is likely that each fossil-bearing lens represents a short term event.
• According to Morrison (1980) the stratigraphy can be considered in terms of two sequences: 1) a lower sequence, up to 6 m thick, of cross-bedded and near horizontally stratified gravels, large scale trough cross-bedded granules with very coarse sands and minor gravels, planar cross-bedded sands, and units rich in organic matter with associated sandy clay; and 2) an upper sequence extending to the present soil, with possible modification in the top 2 to 5 m, consisting essentially of trough cross-bedded quartz granules and coarse sands, lenses and sheets of white clay, and clayey, organic-rich units.
Size class: macrofossils
Preservation: adpression
Collection methods: bulk, chemical, sieve
Primary reference: R. S. Hill and M. K. Macphail. 1983. Reconstruction of the Oligocene vegetation at Pioneer, northeast Tasmania. Alcheringa 7:281-299 [C. Jaramillo/C. Jaramillo]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 166703: authorized by Carlos Jaramillo, entered by Andrés Cárdenas on 22.02.2015, edited by Carlos Jaramillo
Creative Commons license: CC0 (CC0)
Taxonomic list
• 197 imbricate podocarp specimens (Wells & Hill, 1989).
Show authors, comments, and common names
| unclassified |
| - |
|
| Angiospermae |
| Proteales - Proteaceae |
|
| unclassified |
| - |
|
| Bryopsida |
| - |
|
| Lycopodiopsida |
| Lycopodiales - Lycopodiaceae |
|
| Polypodiopsida |
| - Dicksoniaceae |
|
| - Polypodiaceae |
|
| - |
|
| - Blechnaceae |
|
| Pteridopsida |
| - |
|
| Lycopsida |
| - |
|
| Equisetopsida |
| Pinidae - Pinidae |
|
| Magnoliopsida |
| - |
|
| Angiospermae |
| Canellales - Winteraceae |
|
| Sapindales - Sapindaceae |
|
| Oxalidales - Cunoniaceae |
|
| Oxalidales - Elaeocarpaceae |
|
| Fagales - Nothofagaceae |
|
| Fagales - |
|
| Poales - Restionaceae |
|
| Poales - Cyperaceae |
|
| Escalloniales - Escalloniaceae |
|
| Aquifoliales - Aquifoliaceae |
|
| Gunnerales - |
|
| Proteales - Proteaceae |
|
| Buxales - |
|
| Dicotyledoneae |
| Ericales - Sapotaceae |
|
| Ericales - Ericaceae |
|
| Myrtales - |
|
| - |
|
|
| Coniferales - Podocarpaceae |
|
| Coniferales - Cupressaceae |
|
| Schizosporis parvus |
| - |
|