What Is Geological History?

The geologic time scale refers to a long period of time in which the stratigraphic records of Earth's history are recorded. Because the oldest stratum isotope on earth has been found to be about 4.6 billion years old. Therefore, the earth's history is generally divided into two major stages with a limit of 4.6 billion years. The stage before 4.6 billion years is called the "astronomical period" or "pregeological period", and the stage after 4.6 billion years is called the "geological period".

From the time when the earth became an independent planetary body to the beginning of the written record of human history, there was a long period of time in the history of the earth that recorded rock formations. The oldest stratum that has been discovered has an isotope age of about 4.6 billion years. Before 4.6 billion years, it was called the astronomical period, and the entire later period was called the geological period. The geological period is the main period of geohistory research, so it is also called the geohistory period.

universe	generation	discipline	world	The beginning of the decade (million years ago GSSP)	Main event

Phanerozoic	Young generation	Quaternary	Holocene	0.011430 ± 0.00013	Human prosperity (refer to chronology)
			Pleistocene	1.806 ± 0.005	Massive mammal extinction during the ice age
					Human evolution to modern state
		Neogene	Pliocene	5.332 ± 0.005	Human personal ape ancestor
			Miocene	23.03 ± 0.05
		Paleogene	Oligocene	33.9 ± 0.1	The rise of most mammals
			Eocene	55.8 ± 0.2
			Paleocene	65.5 ± 0.3
	Mesozoic	Cretaceous		145.5 ± 4	Dinosaurs boom to extinction
					Cretaceous-Tertiary extinction event, 45% of extinction on Earth
					Placenta mammals appear
		Jurassic		199.6 ± 0.6	Marsupial mammals emerge
					Birds appear
					Gymnosperms
					Angiosperms appear
		Triassic		251.0 ± 0.7	Dinosaur appears
					Oviparous mammals emerge
	Paleozoic	Permian		299.0 ± 0.8	Permian extinction event, 95% of extinction on earth
					Pangu Continental Formation
		Carboniferous		359.2 ± 2.5	Insect boom
					Reptiles appear
					Coal forest
					Gymnosperm
		Devonian		416.0 ± 2.8	Fish boom
					Emergence of amphibians
					Emergence of insects
					Seed plant emerge
					Shi Song appeared with a thief
		Silurian		443.7 ± 1.5	Terrestrial naked fern plants appear
		Ordovician		488.3 ± 1.7	Fish emerges; marine algae flourishes
		Cambrian		542.0 ± 1.0	Cambrian life explosion
Proterozoic	Neoproterozoic	Sinian Period		630 + 5 / -30	Sinian Great Ice Age, the beginning of the evolution of primitive organisms on Earth
		Ice age		850	Snowball event
		Stretching period		1000	For the first time, large thorny agglutinating organisms appeared.
	Middle Proterozoic	Narrow zone		1200	Metamorphic rock belts formed during this period, during which the Rodinia supercontinent took shape.
		Extension period		1400	With the extension of the continental shelf cover, the floor cover continued to expand, and the earliest complex multicellular organisms appeared.
		Caprock		1600	Cyanophyta and brown algae develop, large macro algae appear
	Paleoproterozoic	Consolidation period		1800	The Colombian supercontinent was formed.
		Orogenic		2050	Large-scale orogeny on the continent
		Stratified period		2300	Cyanobacteria and bacteria flourish
		Cheng Tieji		2500	The formation of extra large iron ore fields in the world, and the main period of ferrosilicon construction
Archean	New Archaic			2800	First ice age
	Middle Archeology			3200
	Ancient Archean			3600	Blue-green algae appear
	Archaean			3800
Palaeozoic	Early Rain Haidai			3850	The first organism on earth-bacteria
	Bacchus			3950	Archaea appear
	Native generation			4150	The ocean appears on earth
	Cryptozoic			4570	Earth appears

The article "On the Origin and Evolution of the Earth" argues that in the history of the earth, some astronomical and

Research based on indirect signs. According to a

Invasion period: several years this year (100 million). Minerals related to rock types in major distribution areas

Cenozoic

The geological period from 70 million years ago to modern times is called the Cenozoic and includes the Tertiary and Quaternary.

Superbasic rocks, quartz diorites, granites from Tibet and Taiwan contain elements such as Cr, Au, Cu, Pb, and Zn.

Mesozoic

Geological periods from 230 million to 70 million years ago are Mesozoic, including the Triassic, Jurassic, and Cretaceous.

Late period: Granite, diorite, diorite, etc. in the eastern region, western Yunnan, Tibet, Karakorum Mountains, etc., containing elements such as Sn, Mo, Pb, Zn, Cu, Hg, Sb, Au and so on.

Middle stage: Eastern region, western Yunnan, Tibet biotite granite, granodiorite, basic and ultrabasic rocks, containing Sn, Bi, Mo, Fe, Cu, Pb, Zn, Be, Cr, Ni, Ti, Pt and other elements.

The end of the Yanshan period: It is divided into northern northeast, northern Inner Mongolia, Qinling granite, granitic granite, plagioclase granite, granite porphyry, basic rock, etc., and contains Mo, Cu, Pb, Zn, Au and other elements.

Indosinian period: Nanling, Hainan Island, western Sichuan, western Yunnan, Qinling, southern Qilian mountain biotite granite, quartz diorite, gabbro, containing Fe, Cu, Ni and other elements.

Late Paleozoic

From 400 million years to 230 million years ago, it is a Late Paleozoic geological period, including Devonian, Carboniferous, and Permian.

Late Hercynian: Granite, basic and ultrabasic rocks in Northeast, Inner Mongolia, Tianshan, Kunlun Mountains, Sichuan-Yunnan, and Taiwan, containing elements such as Fe, Sn, Mo, Pb, Zn, Be, Cr, and Ni.

Medium-term: biotite granite, granodiorite, basic and ultrabasic rocks in the Greater Xing'an Mountains, northern Inner Mongolia, Tianshan, and Sichuan-Yunnan border areas, containing elements such as Fe, Cu, Pb, Zn, Cr, Ni, and Co.

Early stage: Altai, Junggar, Tianshan, Sichuan-Yunnan border areas, Qilian Mountains, Kunlun Mountains, Inner Mongolia basic and ultrabasic rocks, granite, granodiorite, etc., containing Cr, Cu, Ni and other elements.

Geological period Proterozoic

There is no stable continental area in this geological period, and there are only a few small land cores scattered in the ocean.

Late period: Qinling, western Hubei granite, diorite

Early stage: granite, granodiorite, granite porphyry, ultrabasic and basic rocks in eastern Liaoning, North China, South China, etc., containing Cu, Pb, Zn, Au, Cr, Ni, Fe and other elements.

Geological period archaic