Natural, it is not man made.
Answer:
According to the nebular hypothesis, our solar system is formed from a huge rotating cloud made mostly of helium and hydrogen.
Explanation:
The nebular hypothesis was proposed by I. Kant. It explains the formation and evolution of the Solar System. It is considered and accepted widely. The theory states that the Solar System was formed from a nebulous material. And as per nebular hypothesis, stars create the huge, dense clouds of molecular hydrogen. This hypothesis tries its best to describe the formation of the solar system from a nebula cloud that was made of a collection of dust and gas. It is also believed that the sun, planets, moons and asteroids were also born around the same time that is, around 4.5 billion years ago from a nebula.
Clastic Textures
Grain Characteristics. The diameter or width of a clastic sediment grain determines its grain size. ...
Rounding. Clastic sediment grains can be round, angular, or in-between (subangular or subrounded). ...
Sorting. The extent to which all the grains are the same size is known as sorting. ...
Other Aspects of Texture.
It should be where the rivers separate through Nigeria
