|- location||south of Double Peak|
|- elevation||463 m (1,519 ft)|
|Mouth||confluence with the Gascoyne River|
|near Landor Station homestead|
|294 m (965 ft)|
|Length||127 km (79 mi)|
|River system||Gascoyne River catchment|
The Thomas River is a river in the Gascoyne region of Western Australia.
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague.
The Gascoyne region is one of the nine administrative regions of Western Australia. It is located in the north west of Western Australia, and consists of the local government areas of Carnarvon, Exmouth, Shark Bay and Upper Gascoyne. The Gascoyne has about 600 km (370 mi) of Indian Ocean coastline; extends inland about 500 km (310 mi); and has an area of 138,000 km2 (53,000 sq mi), including islands.
Western Australia is a state occupying the entire western third of Australia. It is bounded by the Indian Ocean to the north and west, and the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Australia is Australia's largest state, with a total land area of 2,529,875 square kilometres, and the second-largest country subdivision in the world, surpassed only by Russia's Sakha Republic. The state has about 2.6 million inhabitants – around 11 percent of the national total – of whom the vast majority live in the south-west corner, 79 per cent of the population living in the Perth area, leaving the remainder of the state sparsely populated.
The headwaters of the river rise south of Double Peak and flows westwards, joined by two minor tributaries; Coondoondoo Creek and Pink Hills Creek. The river forms its confluence with the Gascoyne River near the Police Station Woolshed. The Thomas flows through the Murrumburra Pool on its way to the Gascoyne. The river descends 169 metres (554 ft) over its 127-kilometre (79 mi) course.
A tributary or affluent is a stream or river that flows into a larger stream or main stem river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean.
In geography, a confluence occurs where two or more flowing bodies of water join together to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river ; or where two streams meet to become the source of a river of a new name ; or where two separated channels of a river rejoin at the downstream end.
The Gascoyne River is a river in the Gascoyne region of Western Australia. At 865 kilometres (537 mi), it is the longest river in Western Australia.
Significant gold and tin deposits have been found in the Thomas River Gascoyne gold fields.
Gold is a chemical element with symbol Au and atomic number 79, making it one of the higher atomic number elements that occur naturally. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental (native) form, as nuggets or grains, in rocks, in veins, and in alluvial deposits. It occurs in a solid solution series with the native element silver and also naturally alloyed with copper and palladium. Less commonly, it occurs in minerals as gold compounds, often with tellurium.
Tin is a chemical element with the symbol Sn (from Latin: stannum) and atomic number 50. It is a post-transition metal in group 14 of the periodic table of elements. It is obtained chiefly from the mineral cassiterite, which contains stannic oxide, SnO2. Tin shows a chemical similarity to both of its neighbors in group 14, germanium and lead, and has two main oxidation states, +2 and the slightly more stable +4. Tin is the 49th most abundant element and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons. It has two main allotropes: at room temperature, the stable allotrope is β-tin, a silvery-white, malleable metal, but at low temperatures it transforms into the less dense grey α-tin, which has the diamond cubic structure. Metallic tin does not easily oxidize in air.
Abercrombie River, a perennial river that is part of the Murray–Darling basin, is located in the central west of New South Wales, Australia.
The De Grey River is a river located in the Pilbara region of Western Australia. It was named on 16 August 1861 by the explorer and surveyor Francis Gregory after Thomas de Grey, 2nd Earl de Grey who was, at the time, President of the Royal Geographical Society.
The Fortescue River is an ephemeral river in the Pilbara region of Western Australia. It is the third longest river in the state.
Dunham River is a river in the Kimberley region of Western Australia.
The Edmund River is a river in the Gascoyne region of Western Australia.
The Lyons River is a river in the Gascoyne region of Western Australia.
The Landor River is a river in the Gascoyne region of Western Australia.
The Gibb River is a river in the Kimberley region of northern Western Australia.
The Kent River is a river in the Great Southern of Western Australia.
The Frederick River is a river that is located in the Gascoyne and Pilbara regions of Western Australia.
The Harding River is a river in the Pilbara of Western Australia. It was named on 31 July 1861 by the surveyor and explorer Francis Gregory while on expedition in the area, after one of the volunteer members of his expedition, John Harding.
The Maitland River is a river in the Pilbara of Western Australia.
The Nullagine River is a river in the Pilbara of Western Australia.
The Oakover River is a river in the Pilbara of Western Australia.
The Yule River is an ephemeral river in the Pilbara region of Western Australia. It was named on 10 August 1861 by the surveyor and explorer Frank Gregory while on expedition in the area, after Thomas Newte Yule, at times farmer of Toodyay, winemaker, Acting Colonial Secretary and Magistrate.
The Fitzroy River, a perennial river of the Glenelg Hopkins catchment, is located in the Western District of Victoria, Australia.
The Minilya River is a river in the Gascoyne region of Western Australia.
The Wooramel River is an ephemeral river in the Gascoyne region of Western Australia.
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