Aikaisemmin olen antanut tästä aiheesta melko puutteellisia tietoja. Nyt tulee tarkemmin tutkittu täydennys.
Urantia-kirja käyttää aina vuotta, jonka pituus on 365.25 nykyistä päivää eli Juliaanisen vuoden pituutta!
Tässä viestissä olen verrannut Urantia-tekstin geologisia aikaskaaloja nykyisiin:
The Marine-Life Era on Urantia, UB(672.1) 59:0.1 :
WE RECKON the history of Urantia as beginning about one billion years ago and extending through five major eras:
1. The prelife era extends over the initial four hundred and fifty million years, from about the time the planet attained its present size to the time of life establishment. Your students have designated this period as the Archeozoic.
2. The life-dawn era extends over the next one hundred and fifty million years. This epoch intervenes between the preceding prelife or cataclysmic age and the following period of more highly developed marine life. This era is known to your researchers as the Proterozoic.
3. The marine-life era covers the next two hundred and fifty million years and is best known to you as the Paleozoic.
4. The early land-life era extends over the next one hundred million years and is known as the Mesozoic.
5. The mammalian era occupies the last fifty million years. This recent-times era is known as the Cenozoic.
The marine-life era thus covers about one quarter of your planetary history. It may be subdivided into six long periods, each characterized by certain well-defined developments in both the geologic realms and the biologic domains.
Urantia-kirjan ”eerat” yllä lyhyesti:
1. Archeozoic: 1000 – 550 mya
2. Proterozoic: 550 – 400 mya
3. Paleozoic: 400 – 150 mya
4. Mesozoic: 150 – 50 mya
5. Cenozoic: 50 – 0 mya
(mya = Million Years Ago)
http://www.enchantedlearning.com/subjec ... ctime.html
Phanerozoic Eon: “Visible Life”
540 to 0 mya ( Million Years Ago)
Cenozoic Era: (The Age of Mammals)
Tertiary Period: 65 to 1.8 mya
Pliocene 5 – 1.8 mya
Miocene 24 – 5
Oligocene 38 – 24
Eocene 54 – 38
Paleocene 65 -54
Mesozoic Era (The Age of Reptiles): 248 to 65 mya
Cretaceous Period 146 to 65 mya
Jurassic Period 208 to 146 mya
Triassic Period 248 to 208 mya
Paleozoic Era: 540 to 248 mya
Carboniferous Period: 360 to 280 mya
Devonian Period: 408 to 360 mya
Silurian Period: 438 to 408 mya
Ordovician Period: 505 to 438 mya
Cambrian Period: 540 to 500 mya
Proterozoic Eon: 2500 to 540 mya
Vendian/Ediacaran Period: 600 to 540 mya
Archeozoic Eon (Archean): 3900 to 2500 mya
Hadean Eon: 4600 to 3900 mya
= = =
Geologic Time Periods:
EON: Two or more geological eras form an Eon, which is the largest division of geologic time, lasting many hundreds of millions of years.
ERA: Two or more geological periods comprise an era, which is hundreds of millions of years in duration.
PERIOD: The period is the basic unit of geological time in which a single type of rock system is formed, lasting tens of millions of years.
EPOCH: An epoch is a division of a geologic period; it is the smallest division of geologic time, lasting several million years.
AGE: An age is a unit of geological time which is distinguished by some feature (like an Ice Age). An age is shorter than epoch, usually lasting from a few million years to about a hundred million years.
Urantia-kirjasta löytyy edelleen nämä geologiset nimet ja aikakaudet:
Cambrian: 400 to 350 mya (length =50)
Ordovician: 350 to 300 mya (length =50)
Silurian: 300 to 275 mya (length =25)
Devonian: 275 to 225 mya (length =50)
Carboniferous: 225 to 180 mya (length=45)
Permian: 180 to 150 mya (length =30)
Triassic: 150 to 125 mya (length =25)
Jurassic: 125 to 100 mya (length =25)
Cretaceous: 100 to 50 mya (length =50)
Eocene: 50 to 35 mya (length =15)
Oligocene: 35 to 25 mya (length =10)
Miocene: 25 to 15 mya (length=10)
Pliocene: 15 to 5 mya (length =10)
Ice Ages and the ancestor of man appeared: 5 to 0 mya (length =5)
(mya = Million Years Ago)
Urantia-kirjan skaalaa 1930 luvulta voi verrata seuraavaan viitteeseen:
(Epoch or Period):
Cambrian: 542 to 488 mya
Ordovician: 488 to 444
Silurian: 444 to 416
Devonian: 416 to 359
Carboniferous: 359 to 299
Permian: 299 to 251
Triassic: 251 to 201.6
Jurassic: 201.6 to 145.5
Cretaceous: 145.5 to 65.5
Paleocene: 65.5 to 55.8
Eocene: 55.8 to 33.9
Oligocene: 33.9 to 23
Miocene: 23 to 5.3
Pliocene: 5.3 to 2.6
Quaternary: 2.6 to 0
Huomatkaa myös että, nämä geologiset aikakaudet ja niitten nimet ja pituudet, ovat edelleen muutosten alaisia:
It is important to realize that with new information about subdivision or correlation of relative time, or new measurements of absolute time, the dates applied to the time scale can and do change. Revisions to the relative time scale have occurred since the late 1700s. The numerically calibrated geologic time scale has been continuously refined since approximately the 1930s (e.g., Holmes, 1937), although the amount of change with each revision has become smaller over the decades (see fig. 1.5 and 1.6 of Harland et al.) and a few numerical estimates were available previously (but often for the duration of the entire scale rather than its individual subdivisions).