Geographical classes on the mountain triggered archeology of teachers and students.

There is a Phoenix Mountain in Wuhan No. 14 Middle School. The school is the only primary and secondary school in the central city of Wuhan. Because of the rich landforms and the prosperity of vegetation, the geographical teachers of the school often bring students to the geographical class on the Phoenix Mountain. In a geographical class in the first year of this semester, the geographical teacher Chen An took the students to study the type of rocks on the Phoenix Mountain, but the students were asked by the students.

Geographic teachers in the fourteenth middle school came to this stone with their classmates. Reporter Peng Nian

"How old is the big stone on the Phoenix Mountain?"

In order to solve the question of the students, Mr. Chen An went to the alma mater China University of Geological University (Wuhan) to check the information, find an expert, and then combined with the geological experts to analyze the boulder on the boulder on the Phoenix Mountain, and found that the formation period of the boulder on the campus was about 370 million. year.

Geographical class on the mountain

Treating a rock "archeology"

Wuhan No. 14 Middle School is built according to Phoenix Mountain. It is full of strange stones and ancient trees on Phoenix Mountain. It also lives small animals such as squirrels. , Taking Phoenix Mountain as a natural class, often led students up the mountain to inspect.

"In a geographical lesson of this semester, I took the students to the rocks on the mountains and the rocks of the rocks. This is also the core knowledge point of the first grade geography class. It is conducive to students' absorption of knowledge points. "Chen An said.

Geographical teachers explained at the scene. Reporter Peng Nian

The teachers and students chose the largest rock on the Phoenix Mountain for observation. The part of the boulder is about 6 meters in diameter, and a large part of the "hide" in the mountains. After careful observation, the teachers and students found that the rocks were red as a whole, and they felt a sand -like grainy. Through observation, the teachers and students determined that the boulder was a sedimentary quartz sandstone.

"Clarify the type of rock, I also want to know the formation of this rock." "Yes, how old is this stone?" The students talked about it. Chen An said that it is not difficult to understand the type of rock, but it is not easy to judge the formation of the stone. In order to answer the students' questions, the teachers were looking for experts to conduct a rock "archeology".

Stone on campus

It turned out to be 70 million years old

Chen An graduated from China University of Geosciences (Wuhan). First of all, through the archives of her alma mater, she read the geological map of Wuhan, and judged the approximate time of the landform formed by the landform of the Phoenix Mountain in comparison of the geological map. Combined with the geological map of Wuhan, Chen An found that Phoenix Mountain was a folds formed by squeezing in the historical period of the earth. It was similar to a wave shape. The school playground was a valley. It was a peak. The folds here were lifted upside down, and the rock was revealed.

370 million years ago boulder. Reporter Peng Nian

"But it is impossible to accurately reach the specific age of the stone." If you want to determine the age of the boulder, you need to ask geological experts to go to the school for inspection, and use professional equipment for composition analysis.

In order to help students solve their confusion, the principal of the school, Ping Jianbai, invited Professor Wang Longzhang, a geological expert of China University of Geosciences (Wuhan), to the school to "pull the pulse" to the school to explore the "past life" of this stone. At the end of June, Professor Wang Longzhang carried professional equipment such as geological hammer, compass, thousands of magnifying glass, and accompanied by a number of teachers such as President Ping Xianbai, Secretary Wang Yongjun, and Chen An, and boarded Phoenix Mountain for inspection.

Thousands of rocky texture under the mirror. Correspondent Chen Chuan

Pingjian Bai introduced that the 14th Middle School was established in 1903, which has a history of 119 years. The school has always attached great importance to the maintenance of the ecological environment, and the maintenance of Phoenix Mountains and ecology is even more detailed. "In addition to the ancient trees on the Phoenix Mountain, there are more than a century of ancient trees. Every year, the schools are targeted to maintain, so that they are still leafy."

Stone texture. Reporter Peng Nian

Professor Wang Longzhang carefully observed the boulder on the Phoenix Mountain with the thousand -time magnifying glass, and saw the mineral composition of the rock and the structure of the mineral. The judgment of teachers and students is not wrong. The boulder is a quartz rock. "After conducting more than two hours of observation and composition analysis, Professor Wang Longzhang judged that the rock was a fifty -pass quartz rock of the late mud pelvic world. Hai and land interaction in the late muddy disciples a few years ago. Geographic teachers in the fourteenth middle school came to this stone with their classmates. Reporter Peng Nian

240 million years ago

Wuhan is the sea

Professor Wang Longzhang introduced: At present, the oldest sedimentary rock formation that Wuhan can find is about 430 million years ago; Wuhan has experienced four sea land changes in 430 million years. Exit the mainland, "the sea becomes into mulberry fields", and Wuhan region becomes inland.

After that, under a series of folds constructing, a mountain range of east -west and intermittent connections was formed in Wuhan area, which constitutes today's Wuhan terrain skeleton: from Hanyang Tangjia Mountain, Mignan Railway Mountain, Bianpan Mountain, Guishan to Wuchang Snake Mountain, Phoenix, Phoenix, Phoenix, Phoenix, Phoenix Mountains, Hongshan, Lujia Mountain, Nanshan Mountain, Yujiashan Maanshan to Shimenfeng and Jiufeng Mountain. Professor Wang Longzhang said: "Use the map to outline the landmarks of these mountains, which is very similar to a dragon's spine. We joked that these mountains constitute the 'dragon veins' in Wuhan."

Fenghuang Mountain is located in the waist and eyes of Wuhan Mountains.

Wang Longzhang went on to teach that the ancient Phoenix Mountain was on the waist of the "dragon", witnessing the changes in the vicissitudes of the river in the Jiangcheng period during the period of geological history. The quartz sandstone on the Phoenix Mountain is a crude substance on the land through the water transportation effect, and it has been deposited, and the rocks formed after a long time. "Time was left in the stone and was explored and found by teachers and students."

The boulder 370 million years ago was on the Phoenix Mountain. Reporter Peng Nian

"In fact, in Wuhan, the stone formed by hundreds of millions of years ago is not uncommon. Many rocks on Guishan and Snake Mountain have a history of 3.4 billion years." Professor Wang Longzhang said, but few people will explore the age of the rock. Nowadays, Children have the spirit of inquiry and "archeological" with the teacher to understand the geological history of Wuhan. Such geographical lessons are so good, "it shows that Phoenix Mountain is not only ecological, but also outstanding."

Professor Wang Longzhang talked about the history of Wuhan's geological changes from a rock in the school. After the school's geography teachers listened carefully and got the "answer", the story of this rock was told to the children. "Our geographical class this time, from the age of a rock in the school, traced back to the changes in the vicissitudes of the sea in Wuhan for hundreds of millions of years, so cool!" Said the school's high school (2) Wang Hongyi.

(Changjiang Daily reporter Yang Feng correspondent Chen Chuan)

【Edit: Zheng Xiaoxiao】

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