Relationship To Earth's Geological Time Scale
The divisions of the lunar geological time scale are based on the recognition of a few convenient geomorphological markers. While these divisions are extremely useful for ordering geological events in a relative manner, it is important to realize that the boundaries do not imply any fundamental change of geological processes. Furthermore, as the oldest geological periods of the Moon are based exclusively on the times of individual impact events (in particular, Nectaris, Imbrium, and Orientale), these punctual events will most likely not correspond to any specific geological event on the other terrestrial planets, such as Mercury, Venus, Earth, or Mars.
Nevertheless, at least one notable scientific work has advocated using the lunar geological time scale to subdivide the Hadean eon of Earth's geological timescale (the Hadean eon is not officially recognized). In particular, it is sometimes found that the Hadean is subdivided into the Cryptic, Basin Groups 1-9, Nectarian, and Early Imbrian. This notation is not entirely consistent with the above lunar geological time scale in that the Cryptic and Basin Groups 1-9 (both of which are only informal terms that are not used in geological maps) comprise the Pre-Nectarian period.
Read more about this topic: Lunar Geologic Timescale
Famous quotes containing the words relationship, earth, geological, time and/or scale:
“When a mother quarrels with a daughter, she has a double dose of unhappiness—hers from the conflict, and empathy with her daughter’s from the conflict with her. Throughout her life a mother retains this special need to maintain a good relationship with her daughter.”
—Terri Apter (20th century)
“We all agree now—by “we” I mean intelligent people under sixty—that a work of art is like a rose. A rose is not beautiful because it is like something else. Neither is a work of art. Roses and works of art are beautiful in themselves. Unluckily, the matter does not end there: a rose is the visible result of an infinitude of complicated goings on in the bosom of the earth and in the air above, and similarly a work of art is the product of strange activities in the human mind.”
—Clive Bell (1881–1962)
“The crystal sphere of thought is as concentrical as the geological structure of the globe. As our soils and rocks lie in strata, concentric strata, so do all men’s thinkings run laterally, never vertically.”
—Ralph Waldo Emerson (1803–1882)
“For poetry was all written before time was, and whenever we are so finely organized that we can penetrate into that region where the air is music, we hear those primal warblings, and attempt to write them down, but we lose ever and anon a word, a verse, and substitute something of our own, and thus miswrite the poem.”
—Ralph Waldo Emerson (1803–1882)
“There is something in us, somehow, that, in the most degraded condition, we snatch at a chance to deceive ourselves into a fancied superiority to others, whom we suppose lower in the scale than ourselves.”
—Herman Melville (1819–1891)