Who knows how geological age and stratigraphic age are divided and what is the difference between th

Strata are rock layers formed in a certain geological age, and each geological age corresponds to a stratum, so the stratigraphic age is the geological age. Mainly the Plutozoic.

No strata, guess), Archean, Archean, Phanerozoic.

No matter how fine it is, it won't be pasted, and you will be tired of looking at it, and you will have to look at your own geology.

Geological age refers to the rocks and strata of different periods on the earth's crust, and the time is expressed in the following units: epoch, epoch, epoch, epoch, and period.

Geologists and paleontologists divide the strata into 4 epochs, 14 generations and 12 epochs according to the order in which the strata are naturally formed. Namely.

the early Ptycoic, Archean, and Proterozoic (the Proterozoic contains 1 Sinian in China);

The Paleozoic, Mesozoic, and Cenozoic epochs of the later Phanerozoic.

The Paleozoic era is divided into Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian, a total of 6 epochs;

The Mesozoic Era is divided into the Triassic, Jurassic and Cretaceous, with a total of 3 epochs;

The Cenozoic is divided into three epochs: Paleogene, Neogene and Quaternary.

The Quaternary is the latest epoch of the Cenozoic, including the Pleistocene and Holocene.

We are still in the Phanerozoic, Cenozoic, Quaternary, and Holocene.

Geological chronology.

01 The earth's 4.6 billion years are divided into two large units, of which the epoch when no life is visible or difficult to see is called the Cryptozoic, and the epoch after a certain amount of life can be seen is called the Phanerozoic. It will also divide the universe into five generations: Archean, Proterozoic, Paleozoic, Mesozoic, and Cenozoic. Each era is divided into several epochs, such as the Triassic, Jurassic, and Cretaceous, and most of these names are the names of rocks and fossils whose geological age was first discovered by geologists.

Usually, we use the units of century, decade, year, month, week, day, hour, second and so on to represent time, but the earth is already 4.6 billion years old, so when talking about the past time, how do we express different time spans?

For this reason, geologists divide the epoch, epoch, epoch, epoch and other units to express the time of geological time.

The geological chronology is a chronological table that chronicles the geological history according to the chronology. Its contents include various geological time units, names and isotopic age values, etc., which can intuitively reflect the sequence of the evolution of rocks, animals and plants on the earth's surface.

According to the age of the earth's rock formations, the age of the earth is divided into different units, which can facilitate the description of the earth and the evolution of life. However, people are accustomed to dividing the earth according to the situation of living things, dividing the earth into two large units for 4.6 billion years, among which the era when no living things can be seen or difficult to see is called the Cryptozoic, and the era after a certain amount of life can be seen is called the Phanerozoic.

The Cryptozoic Epoch began at the origin of the Earth, but its end time is not an absolutely accurate number, probably going back to 100 million years ago. The time from 100 million years to the present is called the Xiansheng Dawn Hold Duan Zhou.

Geologists divide the universe into five generations: Archean, Proterozoic, Paleozoic, Mesozoic, and Cenozoic. Among them, the Cryptozoic is divided into Archean and Proterozoic. Archean generally refers to the period when the Earth was formed, from about 4.6 billion years ago to about 3.8 billion years ago, and its time varies by hundreds of millions of years, because there are still many uncertainties about the oldest life that researchers can grasp.

Archean was followed by the Proterozoic, which generally ended before the Precambrian explosion of life, which was about 100 million years.

Geologists divide the time from the Precambrian period to the present into three units: the Paleozoic, the Mesozoic, and the Cenozoic.

Many animals in the Paleozoic era did not have vertebrates, that is, invertebrates, and people often refer to this era as the age of dinosaurs; During the Mesozoic era, mammals began to evolve; The Cenozoic Era is the era of human life, the most recent generation of the earth, and the Cenozoic Era is also known as the age of mammals.

Each era is divided into several epochs, such as the Triassic, Jurassic, and Cretaceous, and most of these names are the names of rocks and fossils whose geological age was first discovered by geologists. For example, "Cambrian" in the Cambrian is the name of Wales, England, and "Jura" refers to the Jura Mountains of France.

1. Classification of geological time: The sedimentary strata in different regions are analyzed and compared in detail according to fossils and lithologies (mainly fossils), and the interrelationship between them is clarified, and a complete stratigraphic system is established by connecting them in the order of destruction (new and old).

2. Establish a relatively complete stratigraphic system table according to the stratigraphic system, combine the isotopic age, the sequence, process, stage, old tectonic movement, paleogeographic environment change, etc., and divide the entire history of the earth's crust into many natural stages, that is, the geocontinental limb age, and carry out geological chronology in the order of new and old, which constitutes a geological chronology.