Landscape
Apart from a couple of large waterholes, Ormiston Creek is little more than a string of shallow puddles in the dry season.The creek and another tributary meander over the basin floor from near the encrate of the park towards Ormiston Gorge where the hillsides rise steadily higher and more steeply until they become sheer cliffs glowing red in the sun.The floor of the gorge is strewn with huge rounded boulders which sweep through after summer storms.Upstream, a rugged natural enclosure known as Ormiston Pound that spans across 10 km is surrouned by high ridges of quartzite which reflect a myriad of colours from the jasper and other silicate compounds forming the high rim.Beyond this, Mt Giles(283 m) is the highest point in the park.
Climate
Midsummer temperatures range from 23"C to 38"C . Autumn to spring is a more pleasant time to visit the park when daytime temperatures averate 19"C. Night time in winter brings very cold temperatures down to as low as 4"C.
http://www.nt.gov.au/westmacs/stories/nature/all/55
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