We already know the formation of dinosaur fossils. Volcanic ash from nearby volcanoes once covered the whole forest. Sometimes standing trees can be seen in forest fossils, and they are well preserved. Quicksand and asphalt can usually bury animals quickly. The function of tar pitch is like a trap to catch wild animals, and it is also like a preservative to prevent the hard parts of animals from decomposing. Rancho in Los Angeles? Pull? Rancho laBrea asphalt lake in brea is famous for finding many skeletal fossils in it, including wild boar with sharp teeth, giant land sloths and other extinct animals. The remains of some animals that survived the ice age were frozen in ice or frozen soil. Obviously, some frozen animals can be preserved.
Although many unknown creatures have appeared on the earth, only a few have left fossils. However, even if the conditions for turning organisms into fossils are met, there are still other reasons why some fossils have never been discovered. For example, many fossils are destroyed by ground erosion, or its hard parts are decomposed by groundwater. Some fossils may be preserved in rocks, but because rocks have undergone strong physical changes, such as folding, breaking or melting, this change can turn marine limestone containing fossils into marble, and any biological traces that originally existed in limestone will disappear completely or almost completely. There are still many fossils in sedimentary rocks that cannot be obtained for research, and some rocks containing fossils are well exposed on the earth's surface, but they have not been studied in geology. Another very common problem is that the situation of organisms may not be fully displayed because the remains of organisms have become fragments or poorly preserved.
In addition, the longer we go back to the past, the longer the interval between losing fossil records. The older the rock is, the more chances it will be damaged, and the more unrecognizable the fossil will be. In addition, since older creatures are different from today's creatures, it is difficult to classify them, which makes the problem more complicated. However, despite this, a large number of preserved biological fossils still provide a good record for us to understand the past.
The value of dinosaur eggs dinosaur eggs are rare treasures that have gone through thousands and hundreds of millions of years. It is a scientific specimen of great significance in the history of biological and human evolution and a precious scientific and cultural heritage in the world. Dinosaur eggs are interested in exploring the reproductive behavior of dinosaurs, the origin and evolution of dinosaur eggshells, and restoring the ecological environment of dinosaur times; Used to study the emergence, prosperity and extinction of dinosaurs; Used for the division and correlation of Cretaceous strata and the determination of stratigraphic geological age; It is valuable information for studying the changes of paleoclimate, paleogeography and paleontology and providing inspiration for prospecting. Moreover, the dinosaur egg fossil group and its concentrated production area are also very valuable tourism geological resources, which provides a godsend opportunity for the development of tourism. Therefore, dinosaur eggs have very important scientific value, ornamental value, collection value and tourism value. We must cherish and protect dinosaur eggs and their geological environment. The protection of dinosaur egg fossil group lies in nature and in maintaining its original state. If excavated from the geological environment where it exists, its scientific value and other values will be greatly lost. Therefore, we must strictly enforce the law and manage it according to law, enhance the awareness of scientific and cultural heritage and cultural relics protection, and give play to the supervisory role of news media and public opinion.
Distribution of dinosaur eggs in China
Dinosaur egg was found in Hubei and Henan provinces of China.
China is a country rich in dinosaur eggs in the world. The shapes of dinosaur eggs are round, oval, oval, rectangle and olive. The size of dinosaur eggs varies greatly, the smallest is similar to duck eggs, and the largest diameter is less than 10 cm. The big one has a long diameter of more than 50 centimeters. The outer surface of the eggshell is smooth or punctate. Because dinosaur eggs are very precious, paleontologists and government departments all over the world attach great importance to their research, take strict measures to protect dinosaur egg sites and severely crack down on criminals who steal and dig dinosaur eggs.
1997 1 month, Hubei provincial people's government allocated special funds to establish a dinosaur egg site protection zone in Qinglong mountain, Yunxian county, Hubei province. This is the first large-scale dinosaur egg site exclusive reserve in China and even the world.
1993, scientists found a large number of dinosaur eggs in Xixia county, Nanyang, western Henan, China. Before this, humans have found more than 500 dinosaur eggs, and this time there are more than 5,000 dinosaur eggs unearthed in Xixia, and it is estimated that tens of thousands of them have not been unearthed. For a time, the world was shocked.
world
Dinosaur eggs are found all over the world.
In June 1993, about 500 dinosaur eggs have been found all over the world. Among them, there are only about 100 dinosaur eggs containing embryos. With the continuous discovery of dinosaur eggs, the total number of dinosaur eggs found all over the world is increasing. 1July, 1993, a large number of new dinosaur eggs were discovered in the western and southwestern regions of China, especially in Xixia region, which refreshed the old statistical data of dinosaur eggs in the world. Experts believe that there are more than 400 dinosaur eggs found in China in the past, accounting for about 80% of the total number of dinosaur eggs found in the world. Only one collector in Henan Province has collected more than 2,000 dinosaur eggs. According to preliminary statistics, about 4,000 dinosaur eggs were found in China. Its total number ranks first in the world.
Dinosaur eggs buried in the whole stratum.
Some experts in China have analyzed and speculated that the dinosaur egg resources in China are extremely rich, and the buried amount is about 10000. Another expert from China estimated that there are tens of thousands of dinosaur eggs buried in Xixia County, China, which is rare in the world.
Temporal and spatial distribution of dinosaur eggs on the earth
In terms of spatial distribution, dinosaur eggs are found in other continents except the Antarctic (there are reports of dinosaur bones found in the Antarctic). Saint Victor Valle in southeastern France is one of the world-famous dinosaur egg sites. By 1990, hundreds of dinosaur eggs have been found in this area, some of which are intact dinosaur eggs, and their geological age is about equivalent to Mesozoic and Early Cretaceous.
About1.300 million years ago. Xixia area, Henan Province, China is the earliest geological origin of dinosaur eggs discovered in China at present, and its geological age is equivalent to the early Cretaceous, about 654.38 billion years ago. Moreover, 33 dinosaur egg producing areas have been found in the west and southwest of China. Experts believe that its large number, concentrated origin, early geological age and primitive structure are rare in the world. By 1990, the dinosaur eggs found in China were limited to the late Cretaceous red clay rocks. The geological age of a dinosaur egg found in Guangdong Province, China is about equivalent to the end of Cretaceous 65 million years ago. It can be seen that in terms of time distribution, the geological age of dinosaur eggs has been found in the world, which is about equivalent to the early Cretaceous to the end of the late Cretaceous in Mesozoic, about1.3 ~ 0.65 billion years ago. However, the history of the rise and fall of dinosaurs in the world is that they appeared in Triassic in Mesozoic, flourished in Jurassic and Cretaceous, and all died out at the end of Cretaceous. This shows that the time distribution of dinosaur eggs in the world has been found to be close to the late peak and extinction period of dinosaurs. In addition, dinosaur eggs sometimes have the characteristics of large distribution area, concentrated strip distribution and layered distribution. For example, the distribution area of dinosaur egg in Xixia area of China is 40 square kilometers; Buried densely, distributed in a band II, about 2 kilometers wide and about 10 kilometers long; From the local excavation profile, three fossil horizons can be observed, and the fossils are embedded in reddish brown soft rocks.
China, Dinosaur Egg and Nanyang are countries that are rich in dinosaur egg in the world. Dinosaur eggs have been found in 14 provinces, among which the dinosaur eggs in Nanyang, Henan Province have the greatest influence in the world.
Nanyang is one of the earliest areas where dinosaur eggs were found in China. As early as the 1920s, some strange stones were found in this area, which local farmers called? Stone gall? 、? Stone eggs? 、? Ishimaru? 、? Stone ball? Wait a minute. Nanyang dinosaur egg fossil group has a large distribution area and concentrated burial. At present, it has reached thousands, and it is estimated that all of them are buried in tens of thousands, which is rare in the world. Among them, as small as an egg, as big as a rice bowl, mostly oblate, but also shaped like a football. These dinosaur eggs are also very well preserved, and they are basically undisturbed and destroyed in the later period. Except for a small number of eggshells that are slightly depressed by rock layers, most of them are intact, which is really unique in the world.
The appearance of a large number of dinosaur egg fossils provides extremely valuable information for paleontology and paleogeology research. This discovery is called by science? Epoch-making significance? 、? The ninth wonder of the world? . Experts, scholars and tourists from home and abroad come to watch and inspect in an endless stream. Nanyang dinosaur eggs have also been exhibited in Beijing, Japan and other big cities at home and abroad for many times, with remarkable results.
See how dinosaur eggs are formed, and see:
1. Fossil formation conditions
2. How did fossils form?
3. Basic knowledge of stone materials
4. What is a fossil?
5. Fossil collection methods