Middle Ordovician Conodont and Fish Fossils from the Stairway Sandstone, Amadeus Basin

Geoscience Australia Data provides a dataset on the Middle Ordovician Stairway Sandstone, a siliciclastic shallow marine unit in the Amadeus Basin. The dataset includes information on early arandaspid fish fossils and conodonts from a field sample, enabling correlation to international biozonation schemes. The data was last updated on 2026-03-25.

Use Cases

• Correlating regional stratigraphy based on conodont biozonation schemes mentioned in the description.
• Studying early vertebrate evolution based on the presence of arandaspid fish fossils.
• Assessing hydrocarbon reservoir potential for the Larapinta Petroleum System as noted in the description.

Strengths

• Data is associated with a specific, well-described geological unit (Middle Ordovician Stairway Sandstone).
• Contains information on both micro-vertebrate and conodont fossils for biostratigraphic correlation.
• Last updated date is explicitly provided (2026-03-25).

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• The unit has not been directly dated, as stated in the description.

Provenance

Source

Geoscience Australia Data

Collection Method

Field sample collection from the uppermost Stairway Sandstone.

Time Range

Middle Ordovician

Freshness

2026-03-25

Geography

Amadeus Basin