Glacial Groove Orientations and Ice Sheet Extent in the Late Palaeozoic Grant Range

Grooved surfaces in Grant Group rocks provide evidence for Late Palaeozoic ice sheets in Western Australia. The orientation of grooves and sedimentary structures indicate ice motion from the south-southeast, while pebbles of banded iron formation suggest the ice originated 400 km away in the Pilbara Block. This dataset, hosted by the Australian Ocean Data Network, confirms the existence of large continental ice sheets during this glaciation period.

Use Cases

• Reconstructing paleo-ice flow directions based on the orientation of glacial grooves described in the dataset.
• Modeling the extent of Late Palaeozoic ice sheets based on evidence of ice extending 400 km into the Canning Basin.
• Analyzing sedimentary facies geometry to infer the position of grounding lines for ancient ice shelves.
• Correlating glacial deposits using the presence of banded iron formation pebbles as a provenance indicator.

Strengths

• Provides direct geological evidence for ice sheet extent, including a specific 400 km distance from the Pilbara Block.
• Includes directional data on ice motion inferred from groove orientations and sedimentary structures.
• Links specific geological features (grooved surfaces, diamictites) to a broader paleo-environmental context (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

Australian Ocean Data Network

Collection Method

Geological field observation and analysis of rock surfaces and sedimentary structures.

Time Range

Late Palaeozoic

Freshness

Last updated 2026-06-05 06:20:26.319978; freshness should be verified.

Geography

Grant Range, Fitzroy Trough, Canning Basin, and Pilbara Block in Western Australia.