When did the Yangtze River and the Three Gorges region begin to appear in the Yangtze River?

………I can't help but want to talk about the ......... of "The Love of the Slender Man".

What exactly is for the locals to tell you ......I guess it's a kind of labor trumpet ............ like tamping trumpets, watermill numbers, etc

The boatman's horn is a traditional folk song with a long history, which belongs to a type of horn. It is sung in the course of the ship to cooperate with the labor process of shipping and shipping. Due to the different labor intensity and different sailing environments on board, the range of changes in the shipwright's number is quite large.

Some of them are labor-intensive, closely coordinated, and tense in operation, and this kind of trumpet is practical, and in terms of lyrics, most of them are labor call signs; Some of them are sung when the wind and waves are calm and the flat beach is sailing, this kind of trumpet is weak in practicality, and the lyricism is quite strong, and the singer sees the scene and is emotional, and there are more improvised words. It embodies the love, yearning and pursuit of life of hard-working people.

Shipwright sub-classification: 1. Departure number: there are ship departure number, ship pushing number, anchor number, tent number, support number, etc.;

Second, the driving number: there are rocking the number, pulling the number, pulling the fiber number (that is, the slender man number, is a kind of labor number, belongs to the Three Gorges boat song and ship song category, for the boatmen to drive the boat into the beach commonly used number, divided into the Yangtze River slender man number and Shennong Xi slender man number two kinds, mostly for the labor shout, there are lead singers and chorus, there are also with lyrics of the lead singer and chorus. ), wrenching horn, pulling sail number, etc.;

3. Ship stop number: there are anchor numbers, rope numbers, etc.

Due to the different geographical conditions, there are some other ship number varieties in various places.

As a traditional folk number, all kinds of ship numbers are very practical, and most of them are dedicated to special numbers, and they are mostly named after specific labor content. At the same time, some are named after labor call signs, topography, pitch**, etc. Such as "Hey", "Tablet", "See Beach", "Yayo" and so on.

Three copies of the Yangtze River.

The construction of a dam in the gorge area is being completed.

After that, its precipitous and heroic name since ancient bai will be gone. Do you know the Dao Dao? The total length of the Three Gorges is about 200 kilometers, and the peaks on both sides of the river are endless; There are many dangerous shoals, the current is fast, and in some places even the boat must be tugged by a slender man to go up.

The reason why the Three Gorges of the Yangtze River appears to be high and rapid is mainly because of the strong erosion of this section of the river, which constantly cuts down the valley, causing a steep landform. The river carries sediment into the sea, and the sediment continues to accumulate and fill the riverbed, which greatly reduces the slope of the riverbed, slows down the flow rate, and the erosion force is much less than before. At this time, if the earth's crust raises the riverbed, the downward erosion force of the river will be restored and cut downward, and as a result, the mountains on both sides of the river will seem to grow higher and higher, and gradually become canyons.

This is roughly the reason for the formation of the Three Gorges of the Yangtze River. To this day, the upward movement in this area continues, and if the Three Gorges had not been dammed, the Three Gorges would have been even more spectacular than they are today in a long time.

The formation of the Three Gorges is the result of land and sea changes and the development of rivers caused by strong orogeny.

During the Triassic period, 200 million years ago, China's topography was the opposite of today, high in the east and low in the west. The western part of today's Yangtze River basin is the ancient Mediterranean. The area around the Three Gorges is the seashore at that time.

During the orogeny at the end of the Triassic, the crust of the coast here rose, the ancient Mediterranean Sea retreated westward on a large scale, and the famous Huangling anticline began to take shape at sea level. In its west and east, the prototype of the eastern and western ancient Yangtze River appeared, respectively. During another orogeny about 70 million years ago, the Sichuan Basin and the Three Gorges region were uplifted, and the thick rocks in the Three Gorges area were squeezed into twisted folds and faults.

Today's Qiyao, Wushan, and Huangling in the Three Gorges area are the three sections of mountain anticlines formed during this orogeny. After the uplift of these three anticlines, the rivers developed on the east and west slopes formed opposite flow directions. By the time of the Himalayan orogeny 30 to 40 million years ago, the ground in the Yangtze River basin generally rose intermittently, so the terrain was high in the west and low in the east.

Until now, the earth's crust in the Three Gorges region is still slowly rising. After the uplift of the Three Gorges anticline, the rivers on both sides of it, namely the ancient Yangtze River in the west and the ancient Yangtze River in the east, are close to each other in the downward cutting and traceability erosion of the rivers. Because China has formed a high topography in the west and low in the east at this time, the rivers on the eastern slope are steeper than those on the western slope, and their traceability erosion ability is also stronger than that on the western slope.

After tens of millions of years of cutting, the three anticlines in the Three Gorges area were finally cut through, so the two ancient Yangtze rivers in the east and west were connected into one gas, forming today's Yangtze River. After the formation of the Three Gorges, the cutting and eroding effect of the river water on the riverbed and both banks became more intense, which deepened the riverbed. This development is still ongoing.

Long-term flood erosion is formed by the erosion of flowing water, and the cutting action is formed.

The amount of water is large, the water flow is rapid, and the drop is large.