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Photographing Curves: Freestone Creek

Freestone State School is located about 1 km from the hamlet of Freestone, on the eastern Darling Downs. This primary school sits on a high bank of Freestone Creek. This creek rises in quite a narrow valley eroded into the tertiary basalt lava flows that are layered on the eastern Darling Downs.

However, at this point the stream is incised and turns at right angles to its own valley and flows through a gap in the low divide into the valley of Glengallan Creek. Glengallan creek has captured Freestone Creek. Glengallan has a larger catchment and has lowered its valley floor significantly more than Freestone Creek.

The Freestone Valley continues to the SW but without its own creek. The beheaded lower section of the former Freestone Creek is locally known as a gully.

Upstream Freestone Creek actively cutting down through it former valley floor profile and there are areas prone to severe gully erosion in the areas near and below the knick point in the valley profile. Downstream from the school and the village of Freestone, where the creek flows through the gap in the former Freestone-Glengallan divide, the bed of Freestone is cutting through the sandstones that underlay the basalt lava flows.

For those interested in geomorphology, this is a most interesting study area, being an excellent example of stream capture.

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Photo details

  • Uploaded on April 30, 2013
  • © All Rights Reserved
    by Ian Stehbens