Organ Pipes National Park, Keilor

The Organ Pipes National Park, abbreviated as OPNP, is a national park located in the Central region of Victoria, Australia. The 121ha protected area was established with the focus on conservation of the native flora and fauna, and preservation of the geological features in the Jacksons Creek, a part of the valley, north-west of Melbourne. It is situated in a deep gorge in the grassy, basalt Keilor plains.Within Organ Pipes National Park, the valley walls of Jacksons Creek expose Pleistocene volcanic rocks of the New Volcanic Group. These 2.5 to 2.8 million year-old basalt lavas, commonly known as "trap rock," fractured during cooling into vertically standing, hexagonal basalt columns. These columns are locally known as the "organ pipes" for which this park is named. Over the last one to two million years, the slow cutting by Jackson Creek of its valley down into the basaltic plains and through the underlying trap rock exposed these geological structures. The bottom of the valley of Jackson Creek also exposes a prehistoric buried creek valley, which is cut into 400 million year-old (Silurian) mudstones and sandstones. The bottom of this buried valley contains ancient creek gravel. Both the ancient river valley and the Silurian sedimentary rock lies buried beneath the basaltic volcanic rocks of the New Volcanic Group. Marine fossils that are found in the Silurian sedimentary rocks demonstrate that they accumulated beneath a prehistoric ocean.
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Organ Pipes National Park Reviews
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31 reviews
  • We were disappointed. We stopped here to do some walking. The walks were much quicker than stated on the signs. We covered all three major sights in just a few minutes over an hour. The Organ Pipes ar...  more »
  • Hardly 500 metres off Calder Freeway (M79) - just over 20 kms from Melb CBD surrounded by sprawling northern suburbia. 1 hour is ample to walk to the major rock formations - 1.Organ Pipes ancient lava...  more »
  • I didn't know what to expect having heard very little about the Organ Pipes National Park but I was pleasantly surprised. The three major locations within the park - the Organ Pipes, the Rosetta stone...  more »
  • Good place should be better signed as it is really missed. It's a nice place to spend a warm day with family and friends for a picnic and a leisurely stroll along the tracks with lots of photographic opportunities. Please take your rubbish home
  • Hidden treasure not far from the cbd. Steep decent on foot. But worth the unique tranquil views. Be aware noisy every 5 minutes as its in direct line with airport take off lane.
  • Awesome place with great rock formations. Quite a steep walk, but good walking paths. Straight off the caulder freeway.
  • Some seriously cool wildlife to photograph. If you like insects that is
  • See some amazing rock formations and learn a little science while you're there about how they're formed. If you go early, you'll see kangaroos and wallabies. Great place and a quick visit too.

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