Show Us Geology On Stamps. Geologic Formations, Etc

Nauru 1978 and 1984 Local Motifs
Nauru is a raised atoll on top of a volcanic seamount rising from ocean floor. Outcrops of dolomitized and eroded coralline limestone can be found on sandy beaches, in intertidal zone, and around an inland lagoon.

New Caledonia 2012 Tourism
Bonhomme de Bourail is located in Gouaro Bay on the southern coast of New Caledonia. Both the cape and a monolith are remnants of an eroded sandstone formation.

New Caledonia 2013 Landscapes
Hienghène Bay is located on the northern coast of New Caledonia. It is known for towering black limestone rocks that stretch to 60m in height in places and are topped by jagged, sharp edges.

Vanuatu 1998 Volcanoes
Lopevi is an island which consists of the cone of an active andesitic stratovolcano. It is part of the New Hebrides island arc created by subduction of the Australian Plate beneath the Pacific Plate.

Niue 1999 Landscapes
Talava Arches on the northern coast of Niue is part of a coralline limestone formation. The area is riddled with sea cliffs, arches, caves, and other karst landforms.

French Polynesia 2011 Tourism
Ua Pou is an island of the Marquesas volcanic chain which formed from a hotspot beneath the Pacific Plate. Erosion-resistant phonolites form volcanic necks rising above older volcanic rocks.

French Polynesia 2012 Landscapes
Moorea is an island of the Society Islands, a volcanic chain formed by the Society hotspot. Rapa is an island of the Austral Islands, which is part of the Cook-Austral volcanic chain, also of hotspot origin. Both islands comprise Pliocene basaltic rocks with rustic volcanic landforms.


Mangareva is an island of the Gambier Islands situated in the middle of the Pitcairn-Gambier volcanic chain. Parts of a Pliocene crater protrude from the water as islands of igneous rocks.

Pitcairn Islands 2016 and 2018 Landscapes
The Pitcairn-Gambier island chain was created by a hotspot in the south-central Pacific Ocean over the past 11 million years. The youngest Picarian Island is made of basalt and andesite, with rugged outcrops and steep coastal cliffs.

New Zealand 1991 Rock Formations
Punakaiki Rocks are heavily eroded limestone formations on the coast between Westport and Greymouth.
Moeraki Boulders are large and spherical mudstone concretions lying along a stretch of Koekohe Beach.
Organ Pipes are hexagonal basalt columns at Mount Cargill on the South Island.
Castle Hill on the South Island is known for its unusual landscapes of an eroded limestone formation.
Te Kaukau Point at the southern tip of the North Island features tilted strata of limestone interbedded with some sandstone layers.
Ahuriri River Clay Cliffs comprise eroded gravel and silt formations along the northern bank of the Ahuriri River.

New Zealand 2015 World Heritage Sites
Emerald Lakes are located in Tongariro National Park. They fill explosion craters near the summit of Mt Tongariro, a compound volcano made of andesite. Their brilliant colors are partly caused by dissolved minerals.
Franz Josef Glacier scours metamorphic rocks of the Southern Alps in the Westland Tai Poutini National Park. It cuts across the Alpine Fault, the boundary between the Pacific Plate and the Australian Plate.

Australia 2004 Views of Australia - Coastlines
Entrance Beach is located near the town of Broome. It features sandy beaches surrounded by outcrops of eroded Cretaceous sandstone formation.
Mt William National Park is located on the northeast coast of Tasmania. This windswept coastline features eroded Devonian granite outcrops decorated with bright orange lichen.

Australia 2015 Islands
Cape Woolamai is a headland at the south eastern tip of Phillip Island in Victoria. One of its attractions is the Pinnacles created by erosion of the Devonian granite formation.
The Buccaneer Archipelago is located off the coast of Western Australia near the town of Derby. Sea level rise created a drowned coastline with high cliffs of Precambrian sandstone formation.

Australia 2000 Views of Australia I
The Pinnacles are limestone formations within Nambung National Park in Western Australia. The area contains thousands of weathered limestone pillars standing above the yellow sand desert floor.

Australia 2005 World Heritage Sites
Purnululu National Park is located in Western Australia. It contains the Bungle Bungle Range which comprises Devonian sandstone eroded into a series of beehive-shaped towers or cones with steeply sloping surfaces.

Australia 2020 Views of the Australian Alps
Mount Buffalo National Park is located in the alpine region of Victoria, Australia. Erosion-resistant granite outcrops such as the Cathedral Rock stand above the older sandstone and siltstone formations.