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Mount Giluwe
Mount Giluwe
is the second highest mountain in Papua New Guinea
Papua New Guinea
at 4,367 metres (14,327 ft) ( Mount Wilhelm
Mount Wilhelm
being the highest). It is located in the Southern Highlands province and is an old shield volcano with vast alpine grasslands. Ancient volcanic plugs form its two summits, with the central peak the highest and an east peak about 2 kilometres (1.2 mi) away at 4,300 m (14,108 ft). Giluwe has the distinction of being the highest volcano on the Australian continent and Oceania, and is thus one of the Volcanic Seven Summits.[4][5]

Contents

1 Geology 2 History 3 Flora and fauna 4 See also 5 References 6 External links

Geology[edit] The original volcano on the site of Mount Giluwe
Mount Giluwe
formed roughly 650,000–800,000 years ago, probably as a stratovolcano of similar height to the current peak. Extensive Pleistocene
Pleistocene
glaciation eroded away much of the peak, leaving a series of volcanic plugs which form the present-day summits. A renewed episode of extensive volcanic eruptions formed the shield-like bulk of the current mountain between 220,000–300,000 year ago, and there is evidence that some of the lava erupted subglacially.[3] During the last glaciations of the Ice Age, the upper slopes were covered by a massive ice cap over 150 m (500 ft) thick, from which only the main and east peaks protruded as nunataks above the ice surface. At its maximum extent, the ice cap was over 15 km (9 mi) across and covered an area greater than 100 km² (40 mi²). Outlet glaciers extended down as low as 3,200–3,500 m (10,500–11,500 ft), leaving a variety of deposits including glacial till and moraines. Although the glaciers are now long gone, numerous cirques and U-shaped valleys remain visible. The present-day climate on the summit plateau above roughly 3,400 m (11,150 ft) is cold enough for nightly frosts and occasional snowfall.[4] History[edit] Australian explorers Mick Leahy, and his brother Dan, were the first Westerners to reach the area and to discover and climb Mount Giluwe. However, another explorer Jack Hides also laid claim to be the first to discover Mount Giluwe
Mount Giluwe
after viewing the peaks from the west in 1935. Hides aptly named them the Minaret Mountains.[6] However the name did not stick after Leahy went to London
London
in 1935 and set up a hearing into the two opposing claims at the Royal Geographical Society. Leahy delivered his address on 21 November 1935 and the following year Leahy was awarded a grant from the Society and published his discoveries in their journal.[7] Flora and fauna[edit]

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The slopes of Mt. Giluwe exhibit a number of different biomes. Between 2,500 m (8,200 ft) and 2,800 m (9,190 ft) is the lower montane rainforest dominated by Nothofagus
Nothofagus
and Elaeocarpus
Elaeocarpus
with large Pandanus
Pandanus
including the climbing Freycinetia, climbing bamboo, many gingers, orchids, ferns, herbs and shrubs including Begonia. Avian fauna include the endemic dwarf cassowary. Above this is the upper montane rainforest or moss forest, with stunted moss-shrouded trees such as Quintinia
Quintinia
and conifers including Papuacedrus
Papuacedrus
and Podocarpus. The ground is covered in ferns of all types including Blechnum, filmy ferns and the world's largest moss (Dawsonia superba) up to 55 cm (22 in) tall. Rhododendrons grow as epiphytes in the trees as do specialised cloud forest orchids. At 3,200 m (10,500 ft), the moss forest opens into subalpine grassland. This transition marks the extent of glaciation during the last glacial maximum. The grassland is inhabited by towering endemic tree ferns. Tiny wildflowers grow amongst the tussock grasses including Veronica, Viola and Gaultheria. Streams flow in beds once scoured by glaciers, and wet bogs contain frog species found nowhere else on earth. This is also the domain of the endemic woolly ground cuscus, a species of possum. Patches of relict subalpine rainforest cling to the sheltered areas where frost is lessened. Scarlet Rhododendron
Rhododendron
and Dimorphanthera abound in the gnarled dwarf forest and white beard lichens hang in the branches. Above 3,400 m (11,200 ft) on the vast alpine plateau, creeping Astelia, cushion plants and mosses can be found near the numerous tarns, along with alpine blueberries (Vaccinium) and asters in rockier areas. See also[edit]

List of highest mountains of New Guinea List of volcanoes in Papua New Guinea Lists of volcanoes Volcanic Seven Summits

References[edit]

^ a b c " Papua New Guinea
Papua New Guinea
Ultra-Prominence Page". Peaklist.org. Retrieved 2011-11-21.  ^ "Mount Giluwe, Papua New Guinea". Peakbagger.com. Retrieved 2007-03-02.  ^ a b Löffler, E.; Mackenzie, D. E.; Webb, A. W. (1980). "Potassium-argon ages from some of the Papua New Guinea
Papua New Guinea
highlands volcanoes, and their relevance to Pleistocene
Pleistocene
geomorphic history". Journal of the Geological Society of Australia. 26 (7–8): 387–397. Bibcode:1979AuJES..26..387L. doi:10.1080/00167617908729105.  ^ a b Blake, D. H.; Löffler, E. (1971). "Volcanic and Glacial Landforms on Mount Giluwe, Territory of Papua and New Guinea". Geological Society of America Bulletin. 82 (6): 1605–1614. Bibcode:1971GSAB...82.1605B. doi:10.1130/0016-7606(1971)82[1605:VAGLOM]2.0.CO;2. ISSN 0016-7606. Archived from the original (abstract) on 2012-02-17.  ^ Mackenzie, D. E. (1985). "Giluwe and Hagen; glaciated volcanoes in the rain forests of western PNG". Volcano News. 19–20: 7.  ^ Nolan, Riall W. (1983). Bushwalking in Papua New Guinea
Papua New Guinea
(1st ed.). Lonely Planet. ISBN 0-908086-41-5.  ^ Leahy, Michael (March 1936). "The Central Highlands of New Guinea". The Geographical Journal. The Geographical Journal, Vol. 87, No. 3. 87 (3): 229–260. doi:10.2307/1786763. JSTOR 1786763. 

External links[edit]

Mount Giluwe
Mount Giluwe
on Peakware

v t e

Highest Mountains of Papua New Guinea

Mount Wilhelm
Mount Wilhelm
(4,509 m) Mount Giluwe
Mount Giluwe
(4,367 m) Mount Gladstone (4,125 m) Mount Bangeta
Mount Bangeta
(4,121 m) Mount Kabangama (4,104 m) Mount Victoria (4,038 m) Mount Albert Edward (3,990 m) Mount Kubor (3,969 m) Mount Capella (3,960 m) Mount Hagen (3,778 m)

v t e

Volcanic Seven Summits

South America

Ojos del Salado
Ojos del Salado
(6,893 m or 22,615 ft)

Africa

Mount Kilimanjaro
Mount Kilimanjaro
(5,895 m or 19,341 ft)

Europe

Mount Elbrus
Mount Elbrus
(5,642 m or 18,510 ft)

North America

Pico de Orizaba
Pico de Orizaba
(5,636 m or 18,491 ft)

Asia

Mount Damavand
Mount Damavand
(5,610 m or 18,406 ft)

Australia (continental shelf)

Mount Giluwe
Mount Giluwe
(4,367 m or 14,327 ft)

Antarctica

Mount Sidley
Mount Sidley
(4,285 m

.