Dinosaur eggs are useful for research.
1. Fossils can determine the relative age, division and comparison of strata; provide environmental markers and determine and restore ancient sedimentary environments; and understand their role in rock formation and mineralization. In the development and evolution of the earth, many types of fossils have replaced old and new ones and evolved rapidly, forming groups with different characteristics. These groups of paleontology can form different fossil groups or fossil combinations during the deposition of different geohistorical periods, which become an important basis for determining the stratigraphic age and dividing strata.
2. Fossils can provide environmental markers to judge and restore the ancient sedimentary environment. For example, planktonic foraminifera, radiolarians, conodonts, etc. are only produced in marine sediments; such as Mesozoic and Cenozoic charophytes, some ostracods and diatoms are only produced in terrestrial freshwater sediments; some bottom Inhabits foraminifera, ostracods and a small number of charophytes, and is produced in brackish water sediments in coastal marginal environments, etc. During their existence, these different types of ancient organisms have certain requirements for the temperature, salinity, depth, turbidity and sedimentation bottom of the water. Through the paleoecological analysis of various fossil communities or fossil combinations, combined with the study of paleosediology, and using the inference method of comparing the present with the past, the ancient sedimentary environment can be judged and restored. For example, it has been found that my country's Bohai Bay, Yellow Sea, East China Sea and South China Sea were all formed in the Cenozoic Era. In the Tertiary Period, due to the influence of dry and hot climate and transgression, a large amount of salt water and brackish water deposits were formed in the eastern coastal areas of my country. This environment creates conditions for the formation of rich petroleum resources. These are all research results using micropaleontology.
3. In terms of their role in rock formation and mineralization, organisms (including microarchaea) can not only form fuel minerals, such as coal, oil, natural gas, oil shale, etc., but also certain metal sulfide deposits, phosphorus minerals, diatomite, and can also form natural sulfur, various iron ores, manganese ores, uranium ores, bauxite and other minerals. Many organisms have the function of enriching mineral elements. For example, the gold content in some marine organisms is 830 times that of seawater, copper is 3700 times, and aluminum is 267000 times. Although other microorganisms cannot form minerals, they can indicate the direction of mineral exploration or determine the location of mineral-bearing layers.