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-as of [24 FEBRUARY 2024]–
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#1
“HAY dee un”
(hey dee on!)
(bring your brothers back on)
(buy my boyfriend a bong
(EON #1)
(~600 MILLION YEARS LONG)
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(begins with ‘birth’ of ‘earth’)
(~4.6 billion years ago)
(*ended 4 billion years ago*)
(named after ‘hades’)
(‘greek god’ of the ‘under-world’)
(a reference to the fiery hellish state of the planet)
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#2
(EON #2)
(~1.5 billion years long)
“ar KEY en”
(how arcane!)
(greek word for ‘beginning’)
(‘officially’ begins ‘4 billion years ago’)
(seems there is no 1 specific event/change that merits a chronological ‘book-end’)
(beginning of ‘life’?)
(ended ~ 2.5 billion years ago)
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#3
“pro toe row ZO ick”
(yes please!)
(bring me straight to my knees)
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(eon #3)
(~2 billion years long)
(began ~2.5 billion years ago)
(ended ~500 million years ago)
(‘MYA’)
“protero” –> greek for “former”
“zoic” –> greek for “life”
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#4
(eon #4)
(current ‘eon’ as of 2017)
(began ~500 million years ago)
(with the “cambrian period”)
(when diverse hard-shelled animals first “appeared”)
“phanero” –> greek for “visible”
“zoic” –> greek for “life”
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(all geo-history before ‘phanerozoic eon’ is called the ‘pre-cambrian super-eon’*)
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(the most likely ultimate fate of the planet is ‘absorption by the sun’ in about ‘7.5 billion years’, after the star has entered the ‘red giant phase’ and expanded to cross the planet’s orbit)
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*the geological time scale (GTS) is a system of “chronological dating” that relates “geological strata” (aka ‘stratigraphy’) to ‘time’, and is used by ‘geologists’, ‘paleontologists’, and other ‘Earth’ scientists to describe the timing and relationships of events that have occurred during Earth’s history*
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(the table of ‘geologic time spans’, presented here, agrees with the ‘nomenclature’, dates, and ‘standard color codes’ set forth by the ‘International Commission on Stratigraphy’)
(*evidence from ‘radiometric dating’ indicates that ‘earth’ is about 4.54 billion years old*)
(the geology or deep time of Earth’s past has been organized into various ‘units’ according to events which took place in each period)
(different spans of time on the “GTS” are usually marked by changes in the composition of ‘strata’ which correspond to those, and indicate major ‘geological’ or ‘paleontological’ events, such as ‘mass extinctions’)
(for example, the boundary between the ‘Cretaceous’ period and the ‘Paleogene’ period is defined by the ‘Cretaceous–Paleogene’ extinction event, which marked the demise of the ‘non-avian dinosaurs’ and many other groups of ‘life’)
(older ‘time spans’, which predate the reliable ‘fossil record’ (before the ‘proterozoic eon’), are defined by their ‘absolute age’)
(some other ‘planets’ and ‘moons’ within the ‘solar system’ have sufficiently rigid structures to have preserved records of their own ‘histories’, for example, ‘venus’, ‘mars’, and the earth’s ‘moon’)
(dominantly fluid planets, such as the ‘gas giants’, do not preserve their history in a comparable manner)
(apart from the “late heavy bombardment”, events on other ‘planets’ probably had little direct influence on the ‘earth’, and events on ‘earth’ had correspondingly little effect on those planets)
(construction of a ‘time scale’ that links the planets is, therefore, of only limited relevance to the earth’s ‘time scale’, except in the ‘whole-solar-system context’)
(the existence, timing, and terrestrial effects of the “late heavy bombardment” is still debated)
(how did ‘earth’ and the other ‘planets’ form?)
(were planets formed “in situ”?)
(formed 4.5672 ± 0.0006 billion years ago)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥