There were many ways to survey Earth. The following were some common methods: ###I. Geophysical Exploration 1. ** Principle ** - Geophysical exploration was a method to explore underground minerals and study geological structures using physics principles. The rock (ore) or geological structure that exists underground will have corresponding physical phenomena reflected on the surface or near the surface based on its physical properties, size, and location. - It uses appropriate instruments to measure and receive various physical phenomenon information in the work area, and applies effective processing methods to extract the required information. According to the difference between the rock (ore) body or the structure and the surrounding rock, combined with the geological conditions to analyze and make a geological explanation. 2. ** Multi-solution and solution ** - Geophysical exploration has multiple solutions because it is an inverse problem of the gravitational field based on the measured data or the observed gravitational field. The inverse result is generally multi-solution. - In order to obtain more accurate and effective interpretation results, it is generally possible to use a variety of physical exploration methods to carry out a comparison study. At the same time, it is important to combine it with geological survey and geological theory research to carry out comprehensive analysis and judgment. 3. ** Geophysical Field related ** - Geophysical fields can be divided into naturally existing ones (such as the Earth's gravity field, geomantic field, terrestrial electric field, ground temperature field, nuclear physical field) and artificially excited ones (such as the elastic wave field produced by artificial explosion, the local electric field produced by underground power supply, and the electromagnetic field excited by underground electromagnetic waves). - Geophysical fields can also be divided into normal fields and abnormal fields. Anomaly field is a local geological field caused by the exploration target. Geophysical exploration is based on the distribution characteristics of normal field and anomaly field for geological interpretation and inference. For example, the magnetic field produced by the magnetite ore body or magnetic rock mass underground belonged to the abnormal field, and the difference in density between chromite and surrounding rock would cause abnormal phenomena in the gravitational field. 4. ** Category ** - ** According to rock physical properties **: Commonly used rock physical properties include density, magnetic conductivity, electrical conductivity, elasticity, thermal conductivity, and radiation. The corresponding exploration methods include gravity exploration, magnetic exploration, electrical exploration, earthquake exploration, ground temperature exploration, and nuclear exploration. - ** According to the measurement space location and area **: It can be divided into surface geological exploration, aerial geological exploration, marine geological exploration, drilling geological exploration, etc. - ** According to the research object **: It can be divided into metal geological exploration, oil geological exploration, coal geological exploration, water geological exploration, engineering geological exploration, and deep geological exploration. ###II. Geochemical Exploration - The geological survey was also a way to survey the Earth. However, the reference materials did not elaborate on the specific operations of the exploration of the Earth, but it was included in the scope of the geological survey profession, indicating that it had a unique significance in the exploration of the Earth. ###3. Drill Project - For example, the Soviet Union's Kola ultra-deep drilling project began in 1970 with the goal of exploring the depths of the Earth. However, due to technical and environmental difficulties, it was stopped in 1993 and finally dug to 12262 meters. Although it failed to break through the Mohorovic Discontinuity between the Earth's crust and mantle, it also revealed some of the secrets of the Earth. - During the drilling process, information such as rock samples at different depths underground could be directly obtained, which would help to understand the material composition and structure of the Earth's interior. However, the drilling project faced many challenges, such as the high temperature and high pressure environment faced by ultra-deep drilling. It required special drills and technology to deal with it, and it also cost a lot of money, manpower, and other resources.
I recommend " The Iceberg School Hunk's Favorite Sweetheart ", a young school novel written by Pomelo. The story of childhood sweethearts was super romantic, with sweet promises and helpless separation. The plot was very attractive. " Reborn Like a Summer Flower " was a modern romance novel written in a light tone. After the female protagonist was reborn, she transformed magnificently. She went from being weak to being strong, seeking happiness for herself and her lover. The updates were guaranteed. " Lin Xia's Day of Rebirth " was written by Fei Yu. Lin Xia, a thirty-year-old leftover girl, traveled back to her thirteen-year-old self and started a different life. There were also spatial elements. The early plot was very good. " Happy Times of Rebirth 80 " was written by Xiao Qingcha. The female lead, Xia Xiaoyu, was reborn back to 1988. She left the house and worked hard to live. It was a warm and sweet favorite. It was plain but true. It was worth reading. " Li Xia in the Melon Field " was an ancient farming novel written by Ruo Yan. It was a story about the struggle of farmers after the summer solstice. It had the best relatives fighting with wisdom and courage. The style of writing was delicate and warm. It was a masterpiece among farming novels. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
" Wilful " was a novel written by Ping Pingzhu. It was an urban romance novel with the theme of a tyrant. There were two volumes of the book, and when it was published, it added additional chapters. The binding was double sealed inside and outside. Along with the book, there were posters of a match made in heaven, ticket stubs for shooting movies, and a Memorial Day itinerary card. In the story, Jiang Yanzhou was a noble and cold boss. On the surface, he was a winner in life who had everything since he was born in a wealthy family. In fact, he was bound by his family background and lived like a puppet. Song Zhi was a bright and unrestrained female celebrity. She was different from the average person who was cautious in front of the boss. She was bold in front of Jiang Yanzhou and did whatever she wanted, but Jiang Yanzhou always tolerated her. At first, Jiang Yanzhou didn't understand his own feelings and thought that Song Zhi was just a canary that he raised. After losing her, he suddenly realized that he was chasing after his wife. For Song Zhi, he wanted to get rid of the shackles of his family background. Song Zhi was a different color in his life, adding joy to his dull life. The overall style of the novel was relaxed and pleasant. There was a little bit of a wife-chasing plot, and in the end, it was a happy ending. Ping Zhu was an author who was good at writing urban sweet love stories. His writing style was passionate about spreading dog blood, and he involved sweet love and sadism. In addition to " wanton," he also wrote many works such as " The Wealthy Fiancé Lost His Memory " and " Addicted." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
This was a very beautiful blessing, expressing the hope that everyone's thoughts could be realized and that everything they encountered would be what they expected. It was often used to give blessings to friends and relatives, reflecting a positive and optimistic attitude towards life.
She recommended " The Supporting Female Lead Becomes Rich in a Chronicle." The female lead, Ye Xiuqing, wore it on the supporting female lead in the Chronicle, unlike the original supporting female lead who always snatched things from the female lead. The female protagonist focused on herself. When the female protagonist was struggling, she focused on studying, going to university, and starting a career. In the end, she far surpassed the female protagonist. " The Path of the Interstellar Queen " was not bad either. Ye Wen was in a world thousands of years later and was a prisoner in a laboratory. Escaping was her only choice. She was a sci-fi fan. " Transforming into an Immortal Cultivation Female Brainiac " was very interesting. The female protagonist, Mo Wu, was a genius and heaven-defying. She looked at the cultivation world from a girl's point of view. Her family relationships were very familiar. In the early stages, it was like an urban Brainiac, but in the later stages, it felt like cultivation. The male protagonist of " Dreaming of Becoming Stronger ", Tang Tianlou, could learn all kinds of knowledge in his dreams, such as martial arts, genetics, and so on. He could also explore the past and future. It was a super fantasy. " Avatar of a 2D cute girl " was worth reading. Ye Daifei had transmigrated into Ye Daifei and was in a different world. Humans fought with other species for control. The protagonist could transform into a 2D female character to fight. Although the plot was slow, the setting was good.
Divine Summoning was a skill in the Summoner's settings. Judging from its talent level, it was at least an S-grade talent. This skill has the ability to automatically increase the quality of the summoned creature by three levels. The quality of the summoned creature can be divided into ordinary, rare, extraordinary, hero, legendary, epic, mythical, holy spirit, and other different levels. For example, even if he was unlucky enough to summon a normal-grade slime, he could still upgrade it to a hero-level small top-grade Summoned Beast. If they were lucky enough to summon a Hero-grade Summoned Beast, they might even have the chance to use it to get a Genius Professional Medal and enjoy national subsidies. This skill largely solved the problem of Summoners worrying that their summoned beasts were of low quality and not worth nurturing.
There was a story about the son of the big-headed man taking the little milk cow, Little Bean, to his kindergarten. After the big-headed son took Little Ba Doudou out of the milk farm, he found that there was nowhere to go, so he took it to the kindergarten. Little Ba Doudou felt that everything was new to him after he came to the kindergarten. Big Head's son introduced this new friend to the children. After the children came out, they touched different parts of Little Bean. Then, they went back to the classroom to get various decorations to play with it. However, when they came back, they found that Little Bean was gone. It ran to the playground and ate all the grass. In the end, the children quickly pulled it out because the grass on the playground was still used to play football. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
In the Monster List manga, there was no clear indication of who Feng Xi ended up with. Feng Xi and Su Jiu 'er had been together for several lifetimes. In his previous life, he had taken the initiative to pursue Su Jiu' er when he was a tribal leader. In Ah Feng's first life, he had a relationship with Long Sanyuan, who was her child-raising husband. In Zhang Junbao's (Zhang Sanfeng's) first life, he had a relationship with Guo Xiang. In this life, he was a student and the Yang Eye of the Dragon Vein. He had complicated emotional entanglements with many women, but the manga did not give the final result of his feelings.
The Native Americans were the indigenous people of the American continent, not from Africa. There was no such group as the " African primitive Indian savages."
Yu Lei and Li Ding were the crosstalk actors in Serious Crime Division 6. Yu Lei played Sun Shaomin, and Li Ding played Sun Baomin. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>