Macquarie Island

Todd Sain Sr.

3 years ago

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Macquarie Island Facts

This stunning isolated location bears the name of Macquarie Island. Though remote, it plays a vital role in the ecology of the region. That importance ranks as so great that it’s been named a UNESCO World Heritage Site. It’s also an important research site.
Despite that importance, however, it remains almost entirely devoid of human life. The human presence on the island varies between 20 -40 individuals at any one time. That’s because only researchers temporarily based at the facilities there live on the island.
The original base opened in 1911, under Douglas Mawson. Since then, it’s been under the jurisdiction of the Australian National Antarctic Research Expedition. The research facility draws its name from Lachlan Macquarie, a local figure in the early 19th century.
The first known sighting of this marvel occurred in 1810. At that time, an Australian sealer named Frederick Hasselborough spotted it. Evidence, however, indicates that ancient mariners knew of it, since he also spotted the remains of an ancient wreck.
That facility now bears the name of the Macquarie Island Station. There, the scientists conduct research in several important areas. These include, biology, meteorology, and human environmental impact, and perhaps most importantly, geosciences.
In the field of geoscience, Macquarie Island offers an unparalleled opportunity to scientists. That’s due to a surprising statistic. This amazing site actually forms the only known spot where rocks from the earth’s mantle are actively exposed above sea-level.

Tristan da Cunha

Outer Banks

Saint Mary’s Islands

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Macquarie Island Physical Description

Though outstanding in many ways, Macquarie Island does not qualify as large. It also possesses a highly elongated shape. The site measures approximately 21 mi (34 km) in length and 2 mi (3.2 km) in width. Overall, that gives it an area of 47 sq mi (123 sq km).

The majority of the amazing island has a generally flattened structure to it. The overall elevation of the marvelous spot measures roughly 800 ft (240 m). This does, of course, vary in some places. Distinctively, this holds true right up to the shoreline in most places.

This marvel of geology isn’t entirely flat, however. That’s because the beautiful site does hold a certain number of moderately elevated locations. Some hills, highly rounded in nature, do appear. These rise to heights of as much as 1,200 – 1,400 ft (365 – 425 m).

At the shoreline, however, this changes quite rapidly. That’s because the coast of Macquarie Island drops off precipitously in most regions. But its wonders don’t simply stop there. To top things off, even a few small glacial lakes dot the island in various locations.

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Macquarie Island Location, Formation, and Ecosystem

The remarkable Macquarie Island formed in a remote corner of the globe. More precisely, it lies in a sub-antarctic region of the Southern Ocean. Its exact coordinates place the island almost precisely between the continents of Australia and Antarctica.

It boasts an utterly unique geological situation, due to its nature. It actually represents only a tiny part of a much larger structure. That’s the similarly-named Macquarie Ridge. That’s an undersea formation, pushed into its location through the actions of tectonic plates.

The island itself is just the exposed crest of this much larger structure. The base of the astounding formation actually lies far below the waves. This lies at a depth of roughly 3.7 mi (6 km) beneath the surface of the ocean. This mainly, though not solely, consists of basalt.

The majesty and importance of Macquarie Island dos not stop there, though. It’s also an important site for both flora and fauna. A total of at least 25 different species of birds use it for breeding purposes. For some of them, in fact, it’s the only site they use for that.

Among the most notable birds breeding there are albatrosses and petrels. The most noted, though, consists of the awesome royal penguin. This location represents the only known breeding site for that species in the entire world. It also holds a small colony of fur seals.

Its selection of native flora, though, remains somewhat smaller. For one, no native tree species are present. It does boast other types of vegetation, though. These mainly include various grasses and mosses. The most remarkable exception to that is a native orchid.