Uluru vs. Mount Augustus: The Real Largest Monolith
Uluru (Ayers Rock) is iconic — but not the world's largest monolith. That title belongs to Mount Augustus (Burringurrah) in Western Australia.
Size Comparison
| Feature | Uluru | Mount Augustus |
|---|
| Length | 3.6 km (2.2 mi) | 8 km (5 mi) |
| Width | 2.4 km (1.5 mi) | 3 km (1.9 mi) |
| Height above plain | 348 m (1,142 ft) | 717 m (2,352 ft) |
| Base circumference | 9.4 km (5.8 mi) | ~49 km (30 mi) |
| Area | 3.3 km² | 47.95 km² |
| Geology | Arkose sandstone (monolith) | Sandstone/conglomerate (monocline) |
Why the Confusion?
- Uluru = isolated inselberg (classic monolith shape)
- Mount Augustus = monocline (asymmetric fold) — technically a "monolith" by broad definition (single rock mass), but structurally different
- Uluru's global fame (UNESCO, tourism, Indigenous significance) overshadows the larger feature
Both Are Sacred
- Uluru: Anangu Tjukurpa (Dreaming) — climbing banned 2019
- Mount Augustus: Wajarri Yamatji — Burringurrah (ancestral being); climbing discouraged
Other Contenders
- Zuma Rock (Nigeria): 725m high, 3.1 km long — "Abuja's Uluru"
- Peña de Bernal (Mexico): 433m, volcanic plug
- Stone Mountain (USA): 251m, quartz monzonite dome
- Ben Amera (Mauritania): 633m, second-largest monolith claim
Geologists debate "monolith" definition. By mass/volume, Mount Augustus wins. By iconic isolation, Uluru wins.
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