Brown Bluff

Brown Bluff

A rare and dramatic flat-topped volcano home to over 40,000 penguins

Brown Bluff is a great example of a “tuya” - a volcano that has been flattened by erupting through a glacier! These are the rarest of all volcano types and only found in areas that have seen large-scale glaciation in the past.

Brown Bluff with its distinctive “tabletop” look, lies on the Tabarin Peninsula, in the northernmost part of the Antarctic Peninsula.

The landing beach here is made of pebbles and volcanic ash, rising quickly towards steep reddish-brown cliffs. The cliffs are embedded with “volcanic bombs” - large pieces of lava that were thrown out during an eruption, cooling in the air to land as solid spherical or oval shapes.

As well as the fascinating geology, the other star of the show is the birdlife. Brown Bluff is home to over 20,000 breeding pairs of Adelie penguins, as well as a small colony of gentoo penguins. Other breeding residents include storm petrels, Cape petrels, and kelp gulls.

Weddell seals often haul out on the beach here, and it’s also common to see Leopard seals hunting in the waters close to the shore.

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Interesting facts about Brown Bluff

Famously fierce Leopard Seals can sometimes be seen hunting in the waters off Brown Bluff. Watch these fast and fearsome predators in action from the safety of your Zodiac.

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Highlights Close to Brown Bluff

Mawson’s Huts and Cape Denison

Cape Denison is at the eastern edge of the Australian Antarctic Territory at the head of Commonwealth Bay. The peninsula is mostly free of ice and made up of a series of rocky valleys and ridges. The importance of the Cape to Antarctic human history lies in the collection of buildings known as Mawson’s Huts. These were built and lived-in during an Australian Antarctic Expedition that ran from 1911 to 1914, led by the explorer and geologist Sir Douglas Mawson. The huts that now bear his name are very rare, being only one of six sites that still remain from the so-called “heroic era” of Antarctic exploration. There are several buildings that were constructed to house scientific instruments, including taking magnetic readings and astronomical observations. There was also a radio hut - the first time radio transmission was used in the Antarctic. The main hut at Cape Denison has undergone some preservation work but snowfall can still often get inside. Because of the delicate nature of the hut, only 4 people at any time are allowed inside. There you can find an amazing time capsule from the early 20th century, including the cast-iron stove, bottles, jars, cans, and other everyday items. Some of the storage shelves have the names of the men who placed their belongings there written on them with the date - still legible after 120 years. Apart from Mawson’s Huts, Cape Denison is a popular spot for breeding wildlife. Weddell seals can often be seen with pups during the breeding season, and there are also bird colonies including skuas, petrels, and penguins.

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