①图早期形成的深部岩石,其中含有螺、蚌、虫等动、植物化石。②图中期形成的岩石含有虾、蜇等动、植物等化石。③图近期形成上部的岩石,含有鱼类及两栖类(如鳄鱼)等动、植物的化石。④图已经形成含有化石的岩层。由以上①-④图可以看出,随着 Figure 1 The early formation of deep rock, which contains snails, cockroaches, insects and other animal and plant fossils. 2 The rocks formed in the middle stage of the map contain fossils such as shrimps and cockroaches and animals and plants. Figure 3 The upper part of the rock recently formed contains fossils of animals and plants such as fish and amphibians (such as crocodile). 4 maps have formed rock formations containing fossils. As can be seen from the above 1-4 chart, with