Goological Division Of The Oceanic Basin

Source

We know that the continental regions of the earth's surface are high and the sea depths are very low. Such a state of sea cavities is called the Oceanic Basin. The sea is a vast body of water, covering ten to fourteen square miles. The average depth of the sea is about four kilometres. Although the average depth of the ocean is about four kilometres, the vertical depth of the ocean can be from 5000 to 15000 kilometres. The main geological features of the sea cavity presented above

Continental margin: Continental margin extends from the land adjacent to the continental sea to the beginning of the bottom of the sea cavity. There are four types of it.

No.	Types
1	Shoreline
2	Continental shelf
3	Continental slope
4	continental rises, marginal trench and marginal plate

---

Source

---

1. Shoreline

The shoreline is the area adjacent to the ocean of ​​the continents or the land adjacent to the sea which is transformed by the activities between the seas. It is the area between the upper and lower levels of water. The beach is the part of the shoreline that flows towards the sea. This is the place between the elevated level of water that rises as a result of low tide and the lowest level. Beaches always maintain a dynamic balance. That means most of the time it is formed of sand. But not composed of the similar kind of sand. This sand is always moved from one place to another during sea waves and coastal breezes.

---

2. Continental Shelf

At the beginning of the sea, The average slope is 1: 500 and there the slope becomes 1:20 where the last limit of the continent is determined. In some parts of the world, the magnitude of the continent can be from a few millimetres to 650 kilometres. The continental shelf of the Siberian Arctic Sea is the largest in the world and it is long.

---

3. Continental Slope

At the beginning of this, the bottom of the sea starts descending steeply. The slope can be 1:20 or more. The average width of this region is 4000 meters but in some cases, it is only 900 meters wide. There are also stones. The special attraction here is the deep valley below the sea. These are like the English letter "V".

---

4. Continental rises, marginal trench and marginal plate

Continental rises are usually located in the foothills of the Indian, Atlantic, Arctic, Antarctic, and Mediterranean seas. The depths of the intense sea trench seem to be uneven and extremely scary places. It is the widest part of the ocean cavity. More than 6% of the sea cavity is found at depths of 3000-6000 meters. The sea cavity is not smooth, it consists of many sea hills, islands, trench mountains, etc. Ocean basin is usually divided into five parts.

No.	Types
i	Seamounts and Guyot,
ii	Abyssal Plains and Abyssal hills,
iii	Ocean rises,
iv	Island areas and
v	Trench.

Source

(i) Sea Mounts and Guyot: A mountain peak or projection shaped from the floor of an ocean cavity, which is submerged in water, is called a sea mountain. Guyot is the name given to all the mountains that lie flat on the seafloor. Guyot and sea mountains are located 1000-1460 meters below sea level. The eruption of oceanic mountains and gait volcanoes.

(ii) Abyssal Plains and Abyssal hills: Abyssal Plains and Abyssal hills are the most common geological phenomena that are observed everywhere. The small oval-shaped mountains are called the abyss, which borders the plains. Trench or mountains are especially seen where the underground plain is separated. Their height can range from a few feet to several hundred feet. This type of terrain can be seen very close to the depths of the Pacific Ocean. The maximum height of the underworld is about 600 meters.

(iii) Ocean rise: Large distinct peaks rising in unimaginable parts of the subterranean land are not formed in marine mountain areas. Although they are found in almost every ocean, the best example is the Bermuda Ridge in the depths of the North Atlantic Ocean.

(iv) Island areas. Multiple such islands together are called island areas. These two rows of islands are formed in a single island formation system, often with two rows of islands near the trenches.

Source

(v) Trench: A trench is located on the land boundary of the oceans. The resulting deep ravines are called marine trenches. They are arranged in a circular shape at the bottom of the western Pacific Ocean. In addition, South and Central America have the Pacific Ocean. A trench is also found in the Atlantic and Indian Oceans. The trench is formed by the subsurface deformation of the deep ocean boundary line. Deep or Mid Ocean ridge: It is mainly of two types. They are Mid-ocean ridge flanks and Rift mountain valley complex at creat of a ridge.

Mid Ocean ridge flanks : Some subterranean mountains are very important when it comes to the combination of ocean water. For example, from the bottom of the Atlantic Ocean to Greenland to Iceland. The faulty portion of the Mediterranean range extends south along Greenland across the North Sea, extending from north to south in the Atlantic. It has since entered India and the Pacific Ocean.

Rift mountain valley complex at the crest of the ridge : The rift of a deep mountain range is called a rift valley. One such valley is found in the Mid-Atlantic Mountains. The floor of Fatal Valley is located far below sea level. Its spread is up to many miles. It is surrounded by mountain ranges on both sides of Fatal valley and its peak height from the floor of Fatal valley is 1820 meters.

^{Reference - Oceanography & Images wikipedia}

I am inviting @gust.art & @montysingh to participate in the contest.

---

Thank you for reading

---