Moreton Island

Reading the Landscape of Moreton Island

Moreton Island, known to its Traditional Owners, the Quandamooka people, as Mulgumpin, lies at the eastern edge of Moreton Bay, roughly 40 kilometres from Brisbane. It is one of the large sand islands that line the coast of south-east Queensland and northern New South Wales. These islands were built over long periods as sand carried north by longshore drift collected and was shaped by wind. Most of the island sits within a national park and recreation area. That protection is a large part of why its landforms are still so easy to read.

Dunes, lakes and groundwater

The island's high, vegetated dunes are among its most striking features. Mount Tempest is often described as one of the highest coastal sand dunes in the world. Walking inland from the ocean beach, you can see a clear sequence:

• young, mobile foredunes near the surf;
• older, stabilised dunes covered in heath and woodland;
• open sand blows such as the Big and Little Sandhills, where wind keeps the sand bare and moving.

Rain soaks quickly into the sand and forms a freshwater lens that feeds perched lakes and lagoons. Blue Lagoon and the Mirapool are well-known examples. They are a useful case study in how fresh water can exist on an island made almost entirely of sand.

Two very different coastlines

The eastern side faces the open Pacific, with long surf beaches and strong rips. The western side faces the calmer, shallower waters of Moreton Bay. Here you find seagrass beds, sand banks and the Tangalooma Wrecks, a line of deliberately sunk vessels that now act as an artificial reef. The contrast between the two shores shows how wave energy shapes sediment, beach slope and habitat over a short distance. The bay itself is a marine park and an important area for dugongs, turtles and migratory shorebirds.

Practical notes for field visits

Getting to the island means taking a vehicle or passenger ferry from the Brisbane area. Away from the few small settlements, there are no sealed roads. Before you travel:

• Check current ferry timetables and any permit or camping requirements with the official operators and Queensland Parks and Wildlife.
• If you plan to drive, use a four-wheel drive and plan around the tides on the beaches.
• Carry water, sun protection and insect repellent.
• Stay on marked tracks to protect fragile dune vegetation.

For group itineraries and related outings, see our field trips. Further reading on coastal landforms is available in our publications.