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Mount Tinbeerwah

A volcanic plug behind Noosa, and a lookout over the sand country that the Cooloola campaign kept out of the miners' hands.

On the gradient
A hinterland volcanic-plug lookout that reads the whole gradient — sand country and lakes to the sea on one side, ranges climbing inland on the other
Ground beneath it
Hard volcanic rock, the root of a worn-away volcano
Soil
Barely any soil on the bare summit rock; forest and heath below
Technical details
Geology
Volcanic plug — the eroded rhyolitic root of an old volcano, standing proud in the Noosa hinterland
Soil classification
Shallow, skeletal soil on exposed rock at the summit; forest and heath on the flanks

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By Daniel Addington Checked July 2026

Behind Noosa the hinterland breaks out in a rash of steep little hills, and one of the least imposing of them holds one of the finest views on the whole coast. Mount Tinbeerwah is a volcanic plug, the rhyolite core of a volcano that has otherwise vanished, the hard knot in its throat left standing proud while every softer rock around it was stripped back and carried off (Willmott 2007). A short walk brings you up onto its bare rock crown, and from there the region seems to arrange itself for inspection. North and east lie the sand country and the lakes, the low heath running away toward Cooloola with the sea a bright line beyond the dunes. Turn inland and the river valleys and the hinterland ranges climb up and away. It is one of the few places on the coast where you can take in almost the entire gradient in a single slow turn of the head, the reef at one edge of your eye and the range at the other, one connected country tilted down a long slope (see the gradient rule).

The summit does more than let you test the theory. It looks out over country whose fate once turned on people being able to read it.

By the middle of the last century the low heath toward Cooloola was slated to be dug up for the heavy minerals in its dunes, the titanium in the sand, and to almost anyone who looked at it the place was of no use whatever. Two women looked at that same country and saw the opposite. Kathleen McArthur, the Caloundra wildflower painter, and Judith Wright, the poet, both among the founders of the Wildlife Preservation Society of Queensland in 1962, took up Cooloola as their cause and fought a long public campaign for it. Stand on this crown and you can see what was at stake: the whole imperilled sweep of it lies in front of you, near enough to point at and too large to take in any other way.

The national campaign, and the national park in 1975, belong to another telling (see Saving Cooloola). What belongs to the mountain is the view: the saving of one of the coast’s great landscapes turned on people pricing that ground by a measure no mining lease carried, and then persuading the rest of the country to agree.

So the climb earns its keep twice over. The vantage that lets you read the whole gradient is also the one that shows you the worth of the poorest ground (see why the poorest ground grows the richest flora). Stand here and the country in front of you is the country they saved, unrolled as plainly now as it was then.

Sources for this guide 1

Every claim here is traceable.

Concepts this teaches — follow a thread

The gradient rule (substrate writes the country)Why the poorest ground grows the richest flora

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Test yourself →

Forget the whole coast for a moment and crouch at one small creek bank, barely two metres from top to bottom. Up on the lip, thin sandy grit carries hard-leaved heathy shrubs; a stride lower, where silt and leaf litter have gathered into a richer, damper pocket, a little knot of soft-leaved rainforest plants has taken hold. Same creek, same rain, same air — only the ground changes across two metres. What are you reading?

This is the whole-coast rule transferred to a scale of metres. On the lip, the ground is thin, freshly stripped, leached grit — poor soil, so hard-leaved heath. A stride down, weathered fines, silt and leaf litter have gathered into a deeper, damper, richer pocket — better soil, so soft-leaved rainforest plants. Same rain, same air; only the substrate changed, and the vegetation changed with it. The rule that sorts rainforest from heath across the coast does the identical work across one creek bank, because it was never about size — it is about the ground. The near-miss says the rule only 'works' at the whole-coast scale; that mistakes a principle for a map legend. Coincidence cannot explain a pattern that lines up so exactly with the soil, and the lower plants are a different, richer-ground community, not young heath. Read the ground at whatever scale you find it. (Ch 4; Ch 7.)

A restoration crew spreads fertiliser on a patch of degraded wallum heath to 'boost' the native plants back to health. Predict what happens to the *number of plant species* on that patch over the next few years — and why.

This is the poverty-diversity rule run forwards as a management consequence, and it catches good intentions. The heath's diversity is *held up by* its poverty: strip that away with fertiliser and a handful of fast, greedy growers monopolise the windfall, overtop the low specialists and shade them out — richness collapses. The near-miss ('richness rises — more food, more plants') is the intuitive answer and the wrong one; you cannot fertilise a heath back to health, and nutrient run-off from farms and gardens is a genuine threat to the wallum, not a gift. (Ch 4; Ch 9.) The mechanism is best-evidenced at Jurien Bay, WA (Zemunik et al. 2015 — the principle, not a Cooloola measurement).

Cited · traceable Checked July 2026. Every claim is cited to its source, listed above. Grounded in Same Sky, Different Ground — the whole story is in the book →.