| Crustal rocks at different times during the formation of the time and sequence. Relatively geological and radiological dating (absolute geological time) divided. Only explain the relative geological rock formation time of the old and new order, such as the Paleozoic, Mesozoic and Cenozoic so. Radioactive dating of rock formation is clear that the number of years ago, under the rocks in the radioisotope content of transformation products to be determined. Table below. [Ht6h] Geologic Zhou Ji sign on behalf of isotopic ages (in millions of years) for the time duration of the stage of biological development of Phanerozoic Cenozoic Quaternary k z q1 61 6 early human ancestors emerged in this discipline. Neogene n2321 4 plants and animals close to the modern. Common freshwater algae. Small planktonic foraminifera flourished. Mammalian body bigger. Paleogene e6542 angiosperms flourished. In money insects, molluscs and six fire coral. The rapid development of mammals. M z Mesozoic Cretaceous k13570 late this century, a large number of angiosperm found. Foraminifera flourish. Ammonite and arrow stone gradually disappeared. Reptiles to post sharply. Jurassic j20570 ferns, cycads, ginkgo and prosperity such as pine and cypress. Arrow Rock and Ju Shi Xingsheng. Large reptiles (dinosaurs) development. Birds appear. The further development of the Triassic t25045 gymnosperms. Brachiopods reduced. Ammonite and bivalve development. Fan gear type disappeared. Reptiles development. Mammals appear. (Continued) Zhou Ji sign on behalf of isotopic ages (in millions of years) for the time duration of the stage of biological development of Phanerozoic Paleozoic Permian p29040 p z to the late, woody Lycopodium, reed wood, seed ferns, Kodak tree and so tend to decline, gymnosperms such as pine and cypress, etc. started. Ammonites, brachiopods, etc. continue to develop. The end of this century, corals, tabulate corals, trilobites, b12f class extinct. Carboniferous c35565 ferns, woody Lycopodium, reed wood, seed ferns, trees and other subjects in a lot of prosperity. Graptolite decline. Coral, b12f class, brachiopods lot. The further development of amphibians. Reptiles appear. Bare in the early Devonian ferns d41055 prosperity, mid, ferns and primitive gymnosperms appeared. Brachiopods and coral growth. Original chrysanthemum stone there. Insects and primitive amphibians (fan gear type) were first discovered. Fish development. To the late Agnatha become extinct. S43828 at the end of the Silurian, bare ferns began to appear. Brachiopods and corals prosperity. Trilobites and graptolites are still busy. Agnatha development. To late, the original fish there. Ordovician o51072 extensive algae growth. Invertebrates such as trilobites, graptolites, cephalopods, brachiopods, echinoderms (sea Ringo) and so very busy, board foot limulus appear. Find reliable corals. Calcareous algae growth 'Wu Ji ∈ 57060 red algae, green algae and so began to flourish. Compared with the Proterozoic fossil record, a number of categories of invertebrates, especially trilobites, such as start and prosperity. Low brachiopods, animals and development of ancient glass. Proterozoic pt no widely used classification scheme 25,001,930 algae and bacteria began to flourish. To the end of invertebrates there. The Late Archean ar40001500 lower fungi and algae exist, but little reliable fossil record. |