A palynoflora from the upper Flagstone Bench Formation in the Prince Charles Mountains of East Antarctica contains well-preserved Late Triassic microfossils. The assemblage includes taxa like Enzonalasporites vigens and Minutosaccus crenulatus, is assigned to the Norian age Minutosaccus crenulatus Zone, and represents the Onslow Microflora. This record is the first of a Triassic dinocyst from Antarctica and suggests plant dispersal along Tethyan coastal plains during sea-level regression.
Use Cases
- Studying Late Triassic plant dispersal patterns based on shared Tethyan and Gondwanan palynomorph taxa.
- Reconstructing paleoclimate conditions based on the latitudinal distribution (40°-30°S) of the Onslow Microflora.
- Analyzing marine influence in terrestrial deposits based on the presence of rare spinose acritarchs and a dinocyst specimen.
Strengths
- Well-preserved fossil assemblage with specific, named taxa (e.g., Enzonalasporites vigens, Ovalipollis ovalis).
- Provides the first record of a Triassic dinocyst from the Antarctic continent.
- Includes a clear age assignment (Norian) and correlation to the established Minutosaccus crenulatus Zone.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Data files are in PDF/HTML formats, which may require extraction for computational analysis.
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Palynological analysis of rock samples from the Flagstone Bench Formation.
- Time Range
- Late Triassic (Norian age)
- Freshness
- Last updated 2026-04-30 14:04:31.913877; freshness should be verified.
- Geography
- Prince Charles Mountains, East Antarctica