Standley Chasm, Natural gorge formation in Tjoritja National Park, Australia.

Standley Chasm is a narrow gorge in Tjoritja National Park with red quartzite walls that rise about 80 meters high. This natural formation creates a dramatic corridor through ancient rock and displays different geological layers.

The chasm formed over millions of years through water erosion in the MacDonnell Ranges. This geological process shaped the landscape and revealed the different rock layers from various time periods.

The Western Arrernte name for the chasm is Angkerle Atwatye, meaning "Gap of Water". The site lies in a reserve held by the Iwupataka Land Trust, and the surrounding country belonged to the Western Arrernte before pastoralists took it over. The renaming to Standley Chasm was proposed by Ernest Eugene Kramer, who wanted the site brought to public attention.

The path from the parking area to the chasm is well marked and takes about 20 minutes to walk. A cafe and facilities are available at the parking area to refresh yourself before or after your visit.

At midday, sunlight penetrates directly between the chasm walls and creates vivid red-orange colors on the quartzite. This daily effect makes a midday visit especially rewarding for photographers and nature watchers.