Micropalaeontology of Borehole Samples from Herwart Downs, New South Wales

Nineteen samples from Bore No.9285 provide a record of subsurface stratigraphy in the Great Artesian Basin. The samples, submitted by the Water Conservation and Irrigation Commission of New South Wales, were taken at 50-foot intervals between 250 and 1100 feet depth. An excellent suite of Lower Cretaceous foraminifera, especially calcareous species, is present from 450 feet down to 1100 feet.

Use Cases

• Dating subsurface rock layers based on the occurrence of the megaspore Pyrobolospora reticulata.
• Correlating stratigraphy across state borders using characteristic Lower Albian fossil assemblages.
• Reconstructing paleoenvironments based on the described suite of calcareous foraminifera.

Strengths

• Nineteen samples provide a detailed vertical profile.
• Samples were taken at regular 50-foot intervals between 250 and 1100 feet.
• Contains an excellent suite of Lower Cretaceous foraminifera from 450 to 1100 feet.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to a single borehole in New South Wales.

Provenance

Source

Geoscience Australia Data

Collection Method

Samples were collected from a borehole drilled by the Water Conservation and Irrigation Commission of New South Wales.

Freshness

Last updated 2026-05-10 23:02:48.833212; freshness should be verified.

Geography

Bore No.9285 at 29°36'S, 141°17'E, Herwart Downs via Tibooburra, north-western New South Wales, Australia.