Fossilized shells are those made by ancient Marine organisms, such as mollusks, that have been preserved over geological time. These fossils are not only a witness to the Earth's history, but also an important record of the evolution of life. Shell fossils are of various forms and species, and their existence provides important information about the ancient Marine environment, climate change and ecosystem evolution.
By studying fossilized shells, paleontologists can analyze the habits and ecological niches of ancient creatures. For example, the shape, thickness and texture of shells can reveal information about the water depth, temperature and salinity of their habitat. Fossilized shells can also be used for radioisotope dating, helping scientists determine the age and geological history of strata.
Fossilized shells are also important for public education. Many museums display shell fossils to help people understand the diversity of ancient Marine life and changes in ecosystems, and stimulate people's interest in earth science and paleontology. In short, shell fossils are not only a testimony to natural history, but also an important resource for scientific research and education.