I am anxious for the introduction of the earth! Gotta be in English!

Snow line, topography, glacial period, granular snow, crevasses, glacier tongues, continental glaciers, mountain glaciers, ice mushrooms, consumption, abrasion, surface moraines, moraine rocks.

Short answer: 1. Due to the different distribution location, material structure and morphological characteristics of glacial sediments, the landforms of glacial sediments can be divided into several categories, such as glacial water fans and glacial river valleys, outrushing plains, seasonal mud, glacial conglomerates and glacial gravel terraces, pot holes, serpentine mounds, etc.

2. Mountain glaciers are mainly distributed in the high and middle latitudes of the earth. There are various types, mainly hanging glaciers, cirque glaciers, valley glaciers, and flat-topped glaciers.

3. Cirque is a bucket-shaped bedrock glacial erosion landform located near the snow line and evolved from snow erosion depressions. A common type of glacial erosion landform in mountain glaciers. It is mainly caused by rotational abrasion, etching and pull-out of the bottom and wall of the bucket wall by the glacier in the depression.

A typical cirque consists of a basin, a rock wall and a rock sill.

4、.Fin ridge: A ridge with steep slopes and a thin apex. Treatise.

Moraines have the following characteristics:

1. All are composed of debris;

2. Mixed size, lack of sortability, often a mixture of huge stones or fine argillaceous matter;

3. The debris is not arranged in a directional manner, and the flat or long strip of stone can be in an upright state;

4. No layering phenomenon;

5. Most of the edges and corners are distinct;

6. Some breccias have polished surface or ice scratches on the surface, the length of the scratches is different, the large scratches are more than tens of centimeters long, and the small scratches are as thin as hair;

7. The shape of the ice scratch marks is diverse, some are nail-shaped, one end is thick and deep, one end is thin and shallow, the moraine gravel with scratch marks is called the stripe stone, and some gravel is bent by the long-term action of glacial pressure, which is called "monkey face";

8. According to the scanning electron microscope observation, the quartz sand grains in the moraine are irregular in shape, sharp edges and corners, and there are saucer-shaped pits on the surface, and there are shell-shaped fractures and parallel steps in the pits.

9. Contains biological fossils adapted to cold climates, such as cold-type plant spores.

10. In addition, the deposited boulder is called drift boulder, which sometimes comes from great distances and is significantly different from any nearby bedrock.

11. The consolidated moraine is called moraine.

2. Characteristics of glacial valley:

Glacial Valley

A valley formed by glacial erosion. It is also known as a glacial trough valley or U-shaped valley. Actual measurements show that most of the glacial valleys have a parabolic profile.

Glacial valley morphology is related to the traits of glacial erosion and accumulation. Glacial valleys are distributed below the snow line in the mountainous glacial areas, and the source and both sides are surrounded by cirques, and hanging valleys are easily formed at the confluence of the main and branch glaciers. It is flanked by steep slope walls, and above is the valley shoulder, and ice erosion triangles are common.

Ice steps, or rock sills, and rock basins are commonly found in the longitudinal section of the valley bottom. The water in the rock basin is a lake, which alternates with the rock sill and is a bead-shaped lake. Tall, large rock sills often form ice waterfalls.

The upper source of the trough valley under the continental ice sheet and the plateau ice cap has no grain snow basin, and was once called the Icelandic trough valley. The formation of glacial valleys is the result of the widening of the glacier's downward and lateral erosions.

Fernando Magellan, one of the world's navigators. Portuguese, born in 1480 into an aristocratic family. On September 20, 1519, Magellan, financed by the Spanish king's subordinates, led an expedition of 266 men in five sailing ships from the port of Seville, Spain, and began his famous voyage around the world.

Magellan led a detailed voyage across the Atlantic Ocean to Tierra del Fuego in South America, and after many hardships, through the Strait of Magellan into the Pacific Ocean. This was the difficult situation of the flotilla that was already starved and the sailors were hungry and fed with the belts caught up by the mast, but the flotilla continued to advance. While passing through the Philippine Islands, the expedition clashed with the island's natives, and Magellan was wounded and killed, leaving only one ship left in the fleet.

The ship sailed to Spain via South Africa, fulfilling its plan to sail west from the west to the east. He returned to the Spanish port of Seville on September 6, 1522, completing a three-year voyage around the world. Magellan's fleet's circumnavigation of the world proved in practice that the earth is a garden, whether from west to east or from east to west, there is no doubt that it can circle our planet and return to its original place.

UFOs invading the earth are such a common thing, and you still ask about it here. What do you want, yes, I'll tell you, no, the aliens are on the moon, about half of the moon is empty, and even the moon is a flying machine.