儒行天弈精品推荐 ----贝类化石

贝壳化石顾名思义就是形态像贝壳一类的化石，贝壳化石是远古时期中腹目科动物的贝壳经过时间沉淀形成的化石。通俗地说，化石就是生活在遥远过去生物的遗体或遗迹变成的石头。构成化石的概率大概是万分之一到十万分之一，并且受环境的多种不判定要素影响，化石几率还远远小于正常概率。通过研究化石，科学家可以逐渐认识遥远的过去生物的形态、结构、类别，可以推测出亿万年来生物起源、演化、发展的过程，还可以恢复漫长的地质历史时期各个阶段地球的生态环境。贝壳化石，需要千年以上才能够形成的，一个贝壳在沉积物硬化成岩之前就被压入海底，它的外表特征就会留下压印(阴模)。如果阴模后来又被另外一种物质充填，就形成阳模。阳模能显示出贝壳本来的外部特征。该组贝壳化石，重：107.3g。其年代非常久远，它能幸运的保存下来是非常难得的，这组化石外表附满了淡淡的螺旋肌理和石质，纹理清晰，外形呈扇状，是经过长期的地壳变化形成的，表面上分布着贝壳的印迹，体态十分自然，质地温润润滑，纹路美轮美奂，观赏性具佳，是为典型的贝壳化石！

As the name implies, the shell fossil is a kind of fossil with the shape like a shell. The shell fossil is the fossil formed by the time precipitation of the shells of mesopotaceae in ancient times. Generally speaking, a fossil is a stone formed by the remains or remains of organisms living in the distant past. The probability of fossilization is about 1 / 10000 to 1 / 100000, and influenced by many uncertain factors of the environment, the probability of fossilization is far less than the normal probability. By studying fossils, scientists can gradually understand the forms, structures and categories of distant past organisms, infer the process of biological origin, evolution and development in billions of years, and restore the ecological environment of the earth in various stages of the long geological history. It takes more than a thousand years for a shell fossil to form. A shell is pressed into the sea floor before the sediment hardens into rock, and its external characteristics will leave an imprint (negative mold). If the Yin mold is later filled with another material, the male mold will be formed. The male mold can show the shell's original external characteristics. The shell fossils of this group are 107.3g in weight. Its age is very long, and it is very rare for it to survive. This group of fossils is covered with light spiral texture and stone, with clear texture and fan-shaped shape. It is formed through long-term crustal changes, with shell marks distributed on the surface. Its body shape is very natural, its texture is warm and smooth, its texture is beautiful, and its ornamental is good. It is a typical shelling Stone!