Monte Circeo or Cape Circeo is a mountain remaining as a promontory that marks the southwestern limit of the former Pontine Marshes. Although a headland, it was not formed by coastal erosion – as headlands are usually formed – but is a remnant of the orogenic processes that created the Apennines. The entire coast of Lazio, on which the mountain and the marsh are located, was a chain of barrier islands that was formed on a horst and made part of the mainland by sedimentation of the intervening graben.
Madagascar is a large island in the Indian Ocean off the eastern coast of southern Africa, east of Mozambique. It is the fourth largest island in the world. The highest point is Maromokotro, in the Tsaratanana Massif region in the north of the island, at 2,876 metres (9,436 ft). The capital Antananarivo is in the Central Highlands near the centre of the island. Madagascar has a total area of 587,040 square kilometres (226,660 sq mi) with 581,540 square kilometres (224,530 sq mi) of land and 5,500 square kilometres (2,100 sq mi) of water. Madagascar is 400 kilometres east of mainland Africa.
Poole Harbour is a large natural harbour in Dorset, southern England, with the town of Poole on its shores. The harbour is a drowned valley (ria) formed at the end of the last ice age and is the estuary of several rivers, the largest being the Frome. The harbour has a long history of human settlement stretching to pre-Roman times. The harbour is extremely shallow, with one main dredged channel through the harbour, from the mouth to Holes Bay.
Geysir, sometimes known as The Great Geysir, is a geyser in southwestern Iceland. It was the first geyser described in a printed source and the first known to modern Europeans. The English word geyser derives from Geysir. The name Geysir itself is derived from the Icelandic verb geysa the verb from Old Norse. Geysir lies in the Haukadalur valley on the slopes of Laugarfjall hill, which is also the home to Strokkur geyser about 50 metres (160 ft) south.
The Poor Knights Islands are a group of islands off the east coast of the Northland Region of the North Island of New Zealand. They lie 50 kilometres (31 mi) to the north-east of Whangarei, and 22 kilometres (14 mi) offshore halfway between Bream Head and Cape Brett. Uninhabited since the 1820s, they are a nature reserve and popular underwater diving spot, with boat tours typically departing from Tutukaka. The Poor Knights Islands Marine Reserve surrounds the island. Beaglehole (1955) comments that the origin of the island name is not clear, and speculates that the name could be related to the Poor Knights of Windsor, or, that the islands were named for their resemblance to Poor Knight's Pudding, a bread-based dish topped with egg and fried, popular at the time of discovery by Europeans.
Macquarie River a watercourse that is part of the Macquarie–Barwon catchment within the Murray–Darling basin, is one of the main inland rivers in New South Wales, Australia.
The British Indian Ocean Territory (BIOT) is an archipelago of 55 islands in the Indian Ocean, located south of India. It is situated approximately halfway between Africa and Indonesia. The islands form a semicircular group with an open sea towards the east. The largest, Diego Garcia, is located at the southern extreme end. It measures 60 square kilometres (23 sq mi) and accounts for almost three-quarters of the total land area of the territory. Diego Garcia is the only inhabited island and is home to the joint UK-US naval support facility. Other islands within the archipelago include Danger Island, Three Brothers Islands, Nelson Island, and Peros Banhos, as well as the island groups of the Egmont Islands, Eagle Islands, and the Salomon Islands.
The Scattered Islands in the Indian Ocean consist of four small coral islands, an atoll, and a reef in the Indian Ocean, and have constituted the 5th district of the French Southern and Antarctic Lands (TAAF) since February 2007. They have never had a permanent population. Two of the islands—Juan de Nova and Europa—and the Bassas da India atoll lie in the Mozambique Channel west of Madagascar, while a third island, Tromelin, lies about 450 kilometres (280 mi) east of Madagascar and the Glorioso Islands lies about 200 kilometres (120 mi) northwest of Madagascar. Also in the Mozambique Channel is the Banc du Geyser, a reef under French control claimed by Madagascar since 1976. France and the Comoros view the Banc du Geyser as part of the Glorioso Islands.
The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain.
Little Barrier Island, or Hauturu in Māori language, lies off the northeastern coast of New Zealand's North Island. Located 80 kilometres (50 mi) to the north of Auckland, the island is separated from the mainland to the west by Jellicoe Channel, and from the larger Great Barrier Island to the east by Cradock Channel. The two aptly named islands shelter the Hauraki Gulf from many of the storms of the Pacific Ocean.
The Ythan Estuary is the tidal component of the Ythan River, emptying into the North Sea 19 kilometres (12 mi) north of Aberdeen, Scotland. The estuary’s tidal action extends a 7 kilometres (4.3 mi) inland and has characteristic widths of between 250 metres (820 ft) and 780 metres (2,560 ft). Besides the tidal channel there are interfaces to the upland dunes including mudflats, sand beaches and shingle flats. Reaches of salt marsh occur, but they are primarily near the Waterside Bridge and the mouth of the Tarty Burn, a small tributary river. Based upon the habitat of the moorland bordering the east of the Ythan River near the mouth, this estuary is the most significant coastal moorland in the northern United Kingdom.
The Greensand Ridge is an extensive, prominent, often wooded, mixed greensand/sandstone escarpment in south-east England. It runs to and from the East Sussex coast, around the Weald, a former dense forest in Sussex, Surrey and Kent. It reaches its highest elevation, 294 metres (965 ft), at Leith Hill in Surrey—the second highest point in south-east England, while another hill in its range, Blackdown, is the highest point in Sussex at 280 metres (919 ft). The eastern end of the ridge forms the northern boundary of Romney Marsh.
Tsunamis affecting the British Isles are extremely uncommon, and there have only been two confirmed cases in recorded history. Meteotsunamis are somewhat more common, especially on the southern coasts of England around the English and Bristol Channels.
Haslams Creek, a southern tributary of the Parramatta River, is a creek west of Sydney Harbour, located in Sydney, Australia. It flows through Sydney Olympic Park and joins Parramatta River at Homebush Bay.
An equator of a rotating spheroid is its zeroth circle of latitude (parallel). It is the imaginary line on the spheroid's surface, equidistant from its poles, dividing it into northern and southern hemispheres. In other words, it is the intersection of the spheroid's surface with the plane perpendicular to its axis of rotation and midway between its geographical poles.
The 113-kilometre (70 mi) long Great Bear River, which drains the Great Bear Lake westward through marshes into the Mackenzie River, forms an important transportation link during its four ice-free months. It originates at south-west bay of the lake. The river has irregular meander pattern 350-metre (1,150 ft) wide channel with average depth 6 metres (20 ft). Historic air photos show no evidence of bank erosion or channel migration in a 50-year period.
The Jintotolo Channel is the body of water that connects the Sibuyan Sea with the Visayan Sea. It is located between the Philippine islands of Panay and Masbate, and is an important shipping route to and from the Central Visayas.
The Geography of Franz Josef Land refers to an island group belonging to Arkhangelsk Oblast of Russia. It is situated in the Barents Sea of the Arctic, north of Novaya Zemlya and east of Svalbard. At latitudes between 80.0° and 81.9° north, it is the most northerly group of islands associated with Eurasia. The extreme northernmost point is Cape Fligely on Rudolf Island. The archipelago consists of 191 ice-covered islands with a total area of 16,134 km2 (6,229 sq mi). It is currently uninhabited. The archipelago is only 900 to 1,110 km from the North Pole, and the northernmost islands are closer to the Pole than any other land except for Canada's Ellesmere Island and Greenland. The largest island is Zemlya Georga which measures 110 km (68 mi) from end to end. The highest point in the archipelago is on Ostrov Viner-Neyshtadt which reaches 620 m (2,034 ft) above sea level. The central cluster of large islands in the midst of the archipelago forms a compact whole, known as Zichy Land, where islands are separated from each other by very narrow sounds that are frozen most of the year.
Frauenwinkel is a mire landscape in Switzerland, situated at the Seedamm area on Zürichsee lakeshore in the municipality of Freienbach in the Canton of Schwyz.
Deadman's Island is a small island in the estuary of the River Medway in Kent, United Kingdom close to where The Swale flows into the Medway. It is a flat, raised area of marshland around 1200 metres long and 200 metres wide among the tidal sand banks on the southern side of the estuary and separated from the British mainland of Chetney Marshes by a narrow channel known as Shepherd's Creek. The town of Queenborough lies around 1 kilometre (0.62 mi) to the east across the West Swale channel. The island is crossed by several narrow tidal channels that mean that at high tide the island is separated into several smaller islands.
