One of the most important rivers in the United States is the Mississippi River . This is because it is one of the longest rivers in North America, flowing through almost half the country. This river has contributed significantly to the development of the culture and society of these regions. Together with the Missouri River, it forms one of the largest and most important river systems in the world.
For this reason, we are going to dedicate this article to tell you all the characteristics, geology, formation, flora and fauna of the Mississippi River.
Key features
This river is located in the eastern part of the American continent. Its main source is Lake Itasca, which is located in Minnesota. Throughout its course, it flows through well-known mountain ranges such as the Rocky Mountains and the Appalachian Mountains . Along its route, it passes through all kinds of natural and urban structures until it empties into the Gulf of Mexico. The river's mouth forms a wide delta. If you want to learn more about how a delta forms, you can read this article about deltas.
The Mississippi River is approximately 3734 kilometers long. This measurement isn't entirely accurate, as the riverbed and mouth have been altered several times. The primary reason for these changes is the abundance of sediment and silt deposits, which frequently obstruct the flow of water. Sedimentation is an integral part of a river's material transport process. If the surrounding terrain is rich in silt and clay deposits, the river's flow is more likely to be blocked.
The Mississippi River is divided into two main sections: the upper Mississippi and the lower Mississippi. The upper Mississippi begins at its source in Lake Itasca and extends to its confluence with the Missouri River. The Missouri River is the main tributary that greatly increases the Mississippi's flow. The lower Mississippi begins at its confluence with the Ohio River and continues to its mouth.
Path and flow
Its width varies along its course. In the initial section near its source, alongside Lake Itasca, widths typically range from 6 to 9.1 kilometers. Once it passes Lake Winnibigochish, it reaches depths of up to 11 kilometers. It also has sections where it is very deep due to its high flow rate. In areas near New Orleans, it reaches depths of up to 61 meters.
This large volume of water drains into a basin of approximately 3 million square kilometers. This represents between 40 and 41% of the entire continental United States. Both its course and length mean that the river flows through 31 states and 2 Canadian provinces. The average flow velocity in its headwaters is around 2 km/h. Some sections have much higher velocities, reaching speeds of up to 5 km/h. In terms of both size and flow rate, the Mississippi River basin is considered the fourth largest in the world.
Mississippi River Origin Formation
It is believed that the origin of this river was partly due to the ice sheet that formed when the supercontinent Laurentia existed. Its formation dates back to the Ice Age . As the ice melted, a large amount of sediment was deposited on the ground. This sediment transformed the terrain until a flat valley was created. Rivers typically have a V-shaped valley, while glaciers have a U-shaped valley. This is due to the speed at which water erodes and shapes the terrain.
The upper Mississippi is thought to have been established before the Wisconsin glaciation. This river may have been a post-glacial river formed around 800 BC.
Flora and fauna of the Mississippi River
By crossing so many states and having a material rich in silt and clay, it has a high richness in flora and fauna. In addition, having a humid and semi-tropical climate is ideal for the development of many species of animals and plants. Both the course of the river and the basin in general enjoy great biodiversity.
Among the fauna that stands out from the Mississippi River we have the following species:
- Louisiana black bear
- American crocodile
- Yellow map turtle
- Ringed map turtle
- Notropis rafinesquei
- Notropis roseipinnis
- The dancing fish known as Notorus hildebrandis.
- The lake sturgeon
- Amiiform fish
- Amia bald
Many of these listed species are endemic. That is, they are unique species of the Mississippi River since they can only be found in this ecosystem. In addition, apart from the species that is named there are 63 species of mussels and 57 species of crabs. It has 5 species of lamprey in areas where there is more water depth.
In terms of flora, the entire basin also has numerous species, some endemic and others not. Listed the best known:
- Carex vulpinoidea
- Carex stipata
- Impatiens capensis
- Caltha palustris
There are many more, only these are the most abundant and known.
Economic importance and threats
As is to be expected, a river rich in biodiversity and geological elements is of great economic importance for the countries through which it flows. There are several industries and agriculture that depend on the Mississippi River. It is also used as a waterway to move from one place to another and establish businesses. From the arrival of the colonizers, the river became an essential route to be able to send coal, oil, steel and other agricultural products.
Around the 1820s, steamboats became one of the most common means of transportation on this river. The period between 1830 and 1950 was the golden age of these boats . Among the commercial products transported along this river was cotton.
