The sand on beaches around the world comes from the weathering and crushing of rocks for millions of years. It is mixed with fragments of shell creatures and corals and then deposited on the coast by the waves.

Naturally, not all rocks are the same in terms of strength and durability. Some minerals are unstable and easy to be decomposed, and some minerals can resist erosion, so it is more likely to continue in their original state.

The rich rocks in the crust, such as quartz and long stones, have slowly formed sand and granules after millions of years of weathering. This is one of the reasons why sand finally fell on the beach.

In addition, the flowing river has continuously eroded soil rocks and other substances, and the rocks decomposed into tiny sand. Then these particles were taken away by the river and sank with sand or gravel in the ocean or river.

Obviously, this process is long and takes at least hundreds of thousands of years. Calcium carbonate sand found on the earth is the most common type of sand in the Caribbean. This kind of sand may be "changed" in shellfish and corals, and it has gradually formed in the past 500 million years.

Why are some beaches colored? To be precise, the color of the sand on the beach depends on the material of the sand and the local geological conditions.

Pink beach

The beach, it is always golden or white in people's impression. But to say that the most beautiful beach in the world has to mention the pink beach of the Indonesian Islands.

So how is such a beautiful pink beach formed? Generally speaking, the beach on the coral island is still white, but this situation has changed. These pink sands are mixed with white coral powder by the remains of a bug in the local offshore. When the proportion of insect relics reached a certain percentage, the beach appeared pink, so only the beach in Indonesia was pink.

Purple beach

Purple will stimulate these people's creativity and imagination. If you like purple, Pachefo Beach in California is definitely the first choice. Purple in nature is a noble and rare color. Except for some plants, purple only exists in a few shells and gems.

Pacheco Beach is rich in manganese-containing sand grains, which will show varying purple. They are mixed with ordinary sand particles, and they are brought up on the beach with wonderful colors. When swimming here, pay attention to the cool seawater, and there are many sharp rocks on the beach.

Black beach

Black is a color that is difficult to think of as happiness but is loved by young people. For many people, it is a pleasant thing to lie on this black beach to enjoy the sun. The black beach of Hawaii is covered with black particles composed of volcanic lava. And here is also where the turtles like to settle down.

Some things must be paid attention to when playing on the beach. Occasionally there are gravel, broken shells, conch, etc. on the beach, which is very easy to scratch people.

So we need to pay attention when we walk and run on the beach to avoid being injured. Before we go to the beach, we have to check the weather. If there is a recent wind or heavy rain, try not to go to the beach.

We first arrived at a beach and were unfamiliar with the terrain. Both the reef and the rock may be drowned in the sea when they are tied. If you swim too far or are too remote, it is difficult to ask for help. Beginners are better not to go into the water in a deep place.