Mount Adams | |
---|---|
Highest point | |
Elevation | 2,208 m (7,244 ft) |
Prominence | 754 m (2,474 ft) |
Coordinates | 43°06′02″S170°31′40″E / 43.1005°S 170.5277°E |
Geography | |
South Island, New Zealand | |
Parent range | Southern Alps |
Topo map | Topo50 BW17 – Harihari NZMS 260: I35 Whataroa |
Climbing | |
Easiest route | New Zealand Alpine Grade 1 |
Mount Adams is a mountain in the West Coast region of New Zealand's South Island. [1] The summit is roughly 19 km south of Harihari and reaches 2,208 metres (7,244 ft) in height. [2]
Mount Adams lies to the west of the main divide of the Southern Alps and drains into the Whataroa and Poerua catchments. Both of these rivers flow westwards to the Tasman Sea. There are two small glaciers on the south-eastern slopes that drain the summit ice cap; the Escape Glacier (about 2.1 km in length) and the Siege Glacier (about 3.6 km).
This area, like much of the West Coast region, is subject to high precipitation by world standards. There are no rainfall gauges on Mount Adams, but a gauge in Whataroa valley at the State Highway 6 bridge 10 km south-west of the summit at 60 metres above sea level, records a mean annual rainfall of 5,690 mm (224 in) and daily falls of up to 320 mm (13 in). [3] It is likely that the precipitation at higher elevations on Mount Adams will be significantly greater than this, and a rain gauge in the Cropp River 42 km north-east of Mount Adams at 860 metres above sea level, records a mean annual rainfall of 10,690 mm (421 in) and daily falls of up to 695 mm (27.4 in). [4]
The Alpine Fault runs across the lower North-western slopes of the mountain near the edge of the coastal outwash plain, [5] and is the boundary between the Pacific and Indo-Australian tectonic plates. [6] Mount Adams itself is composed primarily of schist of Permian–Triassic (depositional) age, which is increasingly metamorphosed closer to the Alpine Fault. [7]
On 6 October 1999, a large rock landslide originating near the northern summit of Mount Adams deposited c.10–15 million cubic metres of rock in the Poerua River 1,790 metres (5,870 ft) below. This created a 120-metre (390-foot) high landslide dam, which formed a lake that extended 1.2 kilometres upstream. The dam failed six days later during heavy rain. Fears of major damage did not turn into reality when the dam was breached, though significant quantities of coarse gravel were deposited downstream and the river's path was changed in places. [8]
Mount Adams is unique in that it is one of the only glaciated peaks situated on or to the west of the main divide that is accessible as a weekend trip from a west coast road end. [9] The standard route to the summit starts from a hidden layby off SH6 and heads up Dry Creek/Little Man River to a steep spur where a marked route starts. The marked route ends at the bushline and the remainder of the climb is on tussock, rock, and eventually the summit ice cap glacier.
Although this route is technically not difficult, it involves multiple river crossings, off track travel up Dry Creek/Little Man River and above the bushline, and glacial travel requiring an ice axe and crampons. [10] The overall elevation gain, from highway to summit, is approximately 2,100 metres (6,900 ft). Most parties take two days to summit and return to SH6, though it is possible in a long summer day.
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The South Island, also officially named Te Waipounamu, is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, and to the south and east by the Pacific Ocean. The South Island covers 150,437 square kilometres (58,084 sq mi), making it the world's 12th-largest island, constituting 56% of New Zealand's land area. At low altitudes, it has an oceanic climate.
Mount Erebus is the second-highest volcano in Antarctica, the highest active volcano in Antarctica, and the southernmost active volcano on Earth. It is the sixth-highest peak of an island and the second most prominent mountain in Antarctica after Mount Vinson. It has a summit elevation of 3,794 metres (12,448 ft). It is located in the Ross Dependency on Ross Island, which is also home to three inactive volcanoes: Mount Terror, Mount Bird, and Mount Terra Nova. The mountain was named by Captain James Clark Ross in 1841 for his ship, HMS Erebus.
Mount Hood is an active stratovolcano in the Cascade Volcanic Arc. It was formed by a subduction zone on the Pacific coast and rests in the Pacific Northwest region of the United States. It is located about 50 mi (80 km) east-southeast of Portland, on the border between Clackamas and Hood River counties. In addition to being Oregon's highest mountain, it is one of the loftiest mountains in the nation based on its prominence, and it offers the only year-round lift-served skiing in North America.
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Mount Aspiring / Tititea is New Zealand's 23rd-highest mountain. The peak's altitude of 3,033 metres (9,951 ft) makes it the country's highest outside the Aoraki / Mount Cook region.
Mount Garibaldi is a dormant stratovolcano in the Garibaldi Ranges of the Pacific Ranges in southwestern British Columbia, Canada. It has a maximum elevation of 2,678 metres and rises above the surrounding landscape on the east side of the Cheakamus River in New Westminster Land District. In addition to the main peak, Mount Garibaldi has two named sub-peaks. Atwell Peak is a sharp, conical peak slightly higher than the more rounded peak of Dalton Dome. Both were volcanically active at different times throughout Mount Garibaldi's eruptive history. The northern and eastern flanks of Mount Garibaldi are obscured by the Garibaldi Névé, a large snowfield containing several radiating glaciers. Flowing from the steep western face of Mount Garibaldi is the Cheekye River, a tributary of the Cheakamus River. Opal Cone on the southeastern flank is a small volcanic cone from which a lengthy lava flow descends. The western face is a landslide feature that formed in a series of collapses between 12,800 and 11,500 years ago. These collapses resulted in the formation of a large debris flow deposit that fans out into the Squamish Valley.
Fox Glacier is a 13-kilometre-long (8.1 mi) temperate maritime glacier located in Westland Tai Poutini National Park on the West Coast of New Zealand's South Island. Like nearby Franz Josef Glacier, Fox Glacier is one of the most accessible glaciers in the world, with a terminal face as low as 300 m above sea level, close to the village of Fox Glacier. It is a major tourist attraction and about 1000 people daily visit it during high tourist season.
The Franz Josef Glacier is a 12-kilometre-long (7.5 mi) temperate maritime glacier in Westland Tai Poutini National Park on the West Coast of New Zealand's South Island. Together with the Fox Glacier 20 kilometres (12 mi) to the south, and a third glacier, it descends from the Southern Alps to less than 300 metres (980 ft) above sea level.
The Cromwell Gorge is a steep gorge cut by the former Clutha River in the Central Otago region of New Zealand's South Island. It winds 19 km (12 mi) between the Dunstan and Cairnmuir Mountains, linking the townships of Cromwell and Clyde. It is one of three substantial river gorges in Central Otago, the others being the Kawarau Gorge to the west of Cromwell, and the Roxburgh Gorge south of Alexandra.
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The Mount Meager massif is a group of volcanic peaks in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada. Part of the Cascade Volcanic Arc of western North America, it is located 150 km (93 mi) north of Vancouver at the northern end of the Pemberton Valley and reaches a maximum elevation of 2,680 m (8,790 ft). The massif is capped by several eroded volcanic edifices, including lava domes, volcanic plugs and overlapping piles of lava flows; these form at least six major summits including Mount Meager which is the second highest of the massif.
Poerua River is a river in Westland District in the West Coast region of New Zealand's South Island. It flows from its headwaters in the Southern Alps to the Tasman Sea near Harihari. The river is a trout and salmon fishing location and its mouth is where it is met by the Hinatua River and is located roughly a kilometre south of the Wanganui River's mouth. On the morning of 6 October 1999, a landslide from Mount Adams blocked the Poerua River, creating a landslide dam about 11 km upstream from the State Highway 6 bridge over the river. Despite fears of flooding and other damage, there were relatively minimal impacts when the dam was breached six days later, though significant quantities of coarse gravel were deposited downstream and the river's course was changed in places.
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The geology of the Pacific Northwest includes the composition, structure, physical properties and the processes that shape the Pacific Northwest region of North America. The region is part of the Ring of Fire: the subduction of the Pacific and Farallon Plates under the North American Plate is responsible for many of the area's scenic features as well as some of its hazards, such as volcanoes, earthquakes, and landslides.
State Highway 6 is a major New Zealand state highway. It extends from the Marlborough region in the northeastern corner of the South Island across the top of the island, then down the length of the island, initially along the West Coast and then across the Southern Alps through inland Otago and finally across the Southland Plains to the island's south coast. Distances are measured from north to south.
Fox Glacier, called Weheka until the 1940s, is a village on the West Coast of the South Island of New Zealand. The village is close to the eponymous Fox Glacier / Te Moeka o Tuawe.
Trevor James Hill Chinn was a New Zealand glaciologist, who conducted extensive surveys of the glaciers of New Zealand's Southern Alps.
The Butler Range, also known as North Butler Range, is a range located in the Westland District of the West Coast Region on the South Island of New Zealand. The range has also been known as Peaks of the Mist Range.
The South Island, with an area of 150,437 km2 (58,084 sq mi), is the largest landmass of New Zealand; it contains about one-quarter of the New Zealand population and is the world's 12th-largest island. It is divided along its length by the Southern Alps, the highest peak of which is Aoraki / Mount Cook at 3,724 metres (12,218 ft), making it 9th-highest island, with the high Kaikōura Ranges to the northeast. There are eighteen peaks of more than 3,000 metres (9,800 ft) in the South Island. The east side of the island is home to the Canterbury Plains while the West Coast is famous for its rough coastlines such as Fiordland, a very high proportion of native bush, and Fox and Franz Josef Glaciers. The dramatic landscape of the South Island has made it a popular location for the production of several films, including The Lord of the Rings trilogy and The Chronicles of Narnia: The Lion, the Witch and the Wardrobe. It lies at similar latitudes to Tasmania, and parts of Patagonia in South America.