aitihaasik bhoovijnyaaan

is lekh mein sandarbh ya sootr naheen diye gaye hain.
krupaya vishvasaneeya sootron ke sandarbh jodkar is lekh mein sudhaar karein. bina sootron ki saamagri ko hataaya ja sakta hai. (September 2013)

yeh lekh ek aadhaar hai. aap ise badhaakar vikipeediya ki sahaayata kar sakte hain.

aitihaasik bhoovijnyaaan (Historical geology) ke antargat bhoovijnyaaan ke siddhaanton ka upayog karke pruthvi ke itihaas ki punarrachana ki jaati hai aur use samajhne ki koshish ki jaati hai. aitihaasik bhoovijnyaaan un prakriyaaon par apna dhyaan keindrit karta hai jo pruthvi ki satah tatha upasatah ko badalate hain. yeh stariki (stratigraphy), sanrachana-bhoovijnyaaan tatha pailiontolauji (paleontology) aadi ka upayog karke in ghatnaaon ke kram ko nirdhaarit karta hai. aitihaasik bhoovijnyaaan vibhinn bhoovaijnyaaanik kaalon mein viksit paadapon evam jantuon par bhi dhyaan keindrit karta hai. beesaveen shataabdi ke poorvaardh mein rediyosakriyta evam anya rediyomaapi kaalanirdhaaran takaneekon ke vikaas se aitihaasik bhoovijnyaaan ko bahut sahaayata mili.

kisi sthaan ke bhoovaijnyaaanik itihaas ki achhi jaankaari se aarthik bhoovijnyaaan ke kshetr mein bahut madad milti hai. aarthik bhoovijnyaaan, oorja evam kachche maal ki khoj evam nishkarshan ka vigyaan hai. isi prakaar, aitihaasik bhoovijnyaaan ki gahari samajh ke dvaara paryaavaraneeya bhoovijnyaaan (Environmental geology) mein bahut madad milti hai, jaise bhookamp evam jvaalaamukhi aadi ke baare mein jaankaari.

sankshipt itihaas

ion (eon)	mahaakalp (era)	kalp (period)	yug (epoch)	aarambh
Phanerozoic	Cenozoic	Quaternary	Holocene	0.0117
		Quaternary	Pleistocene	2.558
		Neogene	Pliocene	5.333*
		Neogene	Miocene	23.030*
		Paleogene	Oligocene	33.9*
			Eocene	56.0*
			Paleocene	66.0*
	Mesozoic	Cretaceous	Late Cretaceous	100.5*
		Cretaceous	Early Cretaceous	c. 145.0
		Jurassic	Late Jurassic	163.5 ± 1.0
			Middle Jurassic	174.1 ± 1.0*
			Early Jurassic	201.3 ± 0.2*
		Triassic	Late Triassic	c. 235*
			Middle Triassic	247.2
			Early Triassic	252.2 ± 0.5*
	Paleozoic	Permian		298.9 ± 0.2*
		Carboniferous	Pennsylvanian	323.2 ± 0.4*
		Carboniferous	Mississippian	358.9 ± 0.4*
		Devonian		419.2 ± 3.2*
		Silurian		443.4 ± 1.5*
		Ordovician		485.4 ± 1.9*
		Cambrian		541.0 ± 1.0*
Proterozoic	Neoproterozoic	Ediacaran	Precambrian	c. 635*
		Cryogenian		850
		Tonian		1000
	Mesoproterozoic	Stenian		1200
		Ectasian		1400
		Calymmian		1600
	Paleoproterozoic	Statherian		1800
		Orosirian		2050
		Rhyacian		2300
		Siderian		2500
Archean	Neoarchean			2800
	Mesoarchean			3200
	Paleoarchean			3600
	Eoarchean			4000
Hadean				4567