Glacial Groove Surfaces in the Grant Group, Indicating Late Palaeozoic Ice Sheet Extent

Grooved surfaces in Late Palaeozoic Grant Group rocks confirm the existence of large continental ice sheets in Western Australia. The orientation of grooves and sedimentary structures indicate ice motion from the south-southeast, extending 400 km from the Pilbara Block into the Canning Basin. This dataset from Geoscience Australia describes surfaces interpreted as being cut at the grounding line of an ice shelf in the Fitzroy Trough marine embayment.

Use Cases

• Reconstructing paleo-ice flow directions based on groove orientations mentioned in the description.
• Modeling the extent of Late Palaeozoic ice sheets based on the reported 400 km reach from the Pilbara Block.
• Analyzing sedimentary facies geometry to understand grounding line processes in ancient marine embayments.
• Correlating glacial features with banded iron formation pebbles to trace ice provenance.

Strengths

• Specific geographic focus on the Grant Range and Fitzroy Trough in Western Australia.
• Includes interpreted ice flow direction (south-southeast) and a quantified ice sheet extent (400 km).
• Links geological features (grooves, diamictites) to a specific paleoenvironment (ice shelf grounding line).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is presented in PDF/HTML formats, which may require extraction for computational analysis.

Provenance

Source

Geoscience Australia Data

Collection Method

Geological field observation and interpretation.

Time Range

Late Palaeozoic

Freshness

Last updated 2026-04-20 02:27:21.758630; freshness should be verified.

Geography

Grant Range, Fitzroy Trough, Canning Basin, Pilbara Block, Western Australia