What are the sedimentary basins in Nigeria?
… of Nigeria (Figure 2) and these are located in a number of sedimentary basins, comprising the Benue (central), Sokoto (north-west border), Chad (north-east), Bida (central, along the Niger valley), Dahomey (south- west) and Anambra (south-east) Basins and the Niger delta (south coastal).
How many basins are in Nigeria?
In Nigeria there are eight main river basins, i.e. the Benue, Delta and Cross Rivers, the Imo-Anambra, Hadejia-Chad, Sokoto-Rima, Niger, Owena and Ogun, and Osun Basins.
What are the types of sedimentary basins?
| Types of sedimentary basins | |
|---|---|
| Rift-related basins | |
| Basin type | Geological Origin |
| Rift basin | The down-dropped basin formed during rifting because of stretching and thinning of the continental crust |
| Passive margin basin | Subsidence along a passive margin, mostly due to long-term accumulation of sediments on the continental shelf |
What is sedimentary basin in geology?
A sedimentary basin is an area of the earth’s crust that is underlain by a thick sequence of sedimentary rocks. Hydrocarbons commonly occur in sedimentary basins and are absent from intervening areas of igneous and metamorphic rocks (North, 1971).
Why are sedimentary basins important?
Sedimentary basins are of great economic importance. Almost all the world’s natural gas and petroleum and all of its coal are found in sedimentary rock. Many metal ores are found in sedimentary rocks formed in particular sedimentary environments.
Which is the deepest sedimentary basin?
The deepest basins (>15 km) are found in the southern Caspian Sea and in the western Gulf of Mexico. Sedimentary rocks are important because they are the “tape recorder” of past climate, sea-level and environmental change. They are also the world’s largest repositories of oil and gas.
How many types of basins are there?
The major types of basins are river drainage basins, structural basins, and ocean basins. A river drainage basin is an area drained by a river and all of its tributaries. A river basin is made up of many different watersheds.
What is river basin PDF?
River basins are geographical units in which all streams drain to a common terminus, but as a political boundary it is also the result of a choice and social construction.
What is the largest sedimentary basin on earth?
How many sedimentary basins are there in the world?
A total of 764 separate sedimentary basins were mapped with 241 in Asia, 146 in North America, 100 in Africa, 72 in Europe, 71 in South America, 56 in southeast Asia, 35 in Central America, 31 in the Middle East, and 12 in Antarctica.
How do you identify a sedimentary basin?
Sedimentary basin analysis is a geologic method by which the formation and evolution history of a sedimentary basin is revealed, by analyzing the sediment fill and subsidence. Subsidence of sedimentary basins generates the spatial distribution of accommodation infilling sediments.
What is the importance of the basins?
Basins are vital to human existence, since they provide clean water for drinking; water for growing food; and water to nourish plant life, which provides the oxygen people breathe. Historically, basins were also an important factor in determining geopolitical borders.
What are the characteristics of a sedimentary basin?
What basin means?
A basin is a depression, or dip, in the Earth’s surface. Basins are shaped like bowls, with sides higher than the bottom. They can be oval or circular in shape, similar to a sink or tub you might have in your own bathroom. Some are filled with water. Others are empty.
How are basins formed?
When some plates move it causes mountains in certain areas. Sometimes this can leave or sink other areas of land which is surrounded by the mountain. This creates a basin. Another way basins are formed is through erosion.
What are the importance of river basins?
Significances of river basins include; provision of drinking water, food, habitat, fossil information, transportation, recreation, hydroelectric power, erosion control, flood control, oceanic recharge and pollution control.
What are the benefits of river basin Development Authority to rural farmers?
Each authority operates in an assigned geo-morphological and political boundary and work to improve agriculture and rural development through irrigation, control of river pollution and also to assist farmers in processing food crops.
Why do we study sedimentary basins?
Sedimentary basins are also important from a purely scientific perspective because their sedimentary fill provides a record of Earth’s history during the time in which the basin was actively receiving sediment. More than six hundred sedimentary basins have been identified worldwide.
What causes basins to form?
Basins are formed by forces above the ground (like erosion) or below the ground (like earthquakes). They can be created over thousands of years or almost overnight. The major types of basins are river drainage basins, structural basins, and ocean basins.
What are examples of basins?
There are five major ocean basins, coordinating with the major oceans of the world: the Pacific basin, the Atlantic basin, the Indian basin, the Arctic basin, and the Southern basin. Many smaller basins are often considered oceanic basins, such as the North Aleutian Basin, between the Pacific and Arctic Oceans.
How basins are formed?
The main river along with all its tributaries that drain an area forms a river basin or the catchment area. A river basin is made up of many different watersheds. A watershed is a small version of a river basin.
What is an example of a basin?
An example of a basin is the Amazon Basin where the Amazon River and all its branches and tributaries drain. An example of a basin isthe Nashville Basin in Tennessee where all of the rock strata angle down and away from Nashville. A region drained by a single river system.
What is a basin used for?
A basin is a container that holds water and is used for washing, but you probably just call it your bathroom sink. You can think of basinas something shaped like a bowl.
What is another name for a river basin?
Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium.