Mr. Davies’s Reviews > Supercontinent: Ten Billion Years in the Life of Our Planet > Status Update
Mr. Davies
is on page 123 of 304
Pangaea was the first lost supercontinent that actually EXISTED to be imagined by the human mind. In one sense, it is still and always will be a fantasy; but one constrained by uniformitarianism — not Lyellian, but one that truly takes full account of the importance of the rare event I’m geological time. Thus the human imagination is held within the fruitful confines of method …
— Mar 26, 2023 01:51PM
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Mr. Davies’s Previous Updates
Mr. Davies
is on page 269 of 304
Lucretius says Earth is young because no poets recorded before Homer —
John Joly retorts — “Wemove in a greater history, the landmarks of which are not the birth and death of kings and poets, but of species, genera, orders … We are … in possession today or some of those lost Iliads and Odysseys for which Lucretius looked in vain”
— Apr 02, 2023 12:26PM
John Joly retorts — “Wemove in a greater history, the landmarks of which are not the birth and death of kings and poets, but of species, genera, orders … We are … in possession today or some of those lost Iliads and Odysseys for which Lucretius looked in vain”
Mr. Davies
is on page 257 of 304
Albrecht Durer’s Melancholia — metaphor for human scientific inquiry
— Apr 02, 2023 12:11PM
Mr. Davies
is on page 253 of 304
Natural selection is often thought of as what ‘changes’ organisms, but this is only true if the environment is changing, disturbing the equilibrium. Under stable conditions, natural selection is a Shri fly conservative force that keeps things they way they are and makes sure that things that aren’t broke DON’t get fixed.
— Apr 02, 2023 12:11PM
Mr. Davies
is on page 254 of 304
Shift to rise in complex animals post-Rodinia — tracking clock of “junk DNA” [inactive, unexpressed DNA]
“On the supercontinent of science, everything must fit together.”
— Apr 02, 2023 12:06PM
“On the supercontinent of science, everything must fit together.”
Mr. Davies
is on page 248 of 304
Ongoing conflict around “snowball earth” hypothesis vs. “slush ball Earth” vs. thin-ice equator earth — biologists Vs. Geologists
— Apr 02, 2023 11:59AM
Mr. Davies
is on page 244 of 304
Why “snowball earth” cycles? — unique among supercontinents, Rodinia seems to have straddled the Equator — never has the coincidence of low greenhouse gases, weak Sun and tropical concentration of landmasses come about again.
— Apr 02, 2023 11:48AM
Mr. Davies
is on page 239 of 304
Supercontinents are arid because moisture cannot reach their interior … After supercontinent fragmentation, more rain tends to fall on more land, and Rick weathering speeds up … as more rocks were weathered, even more carbine dioxide was removed from the atmosphere and delivered to the seas …
— Apr 02, 2023 11:22AM
Mr. Davies
is on page 233 of 304
Hypotheses that early oxygenation “sinks” into mineral deposits (like iron) and they, in turn, affect deeper, core earth
Once oxygen sinks are “full,” oxygen begins accumulating in atmosphere
— Apr 02, 2023 11:13AM
Once oxygen sinks are “full,” oxygen begins accumulating in atmosphere
Mr. Davies
is on page 228 of 304
Theory that Early organisms could have migrated into the ocean floor … This was the beginning of the so-called ‘deep biosphere,’ the mass of microbes that diets silently and invisibly in the pore spaces of the watt’s lithosphere, but whose total mass even today outweighs all living things in the planet’ surface.
— Apr 02, 2023 09:42AM
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Mar 26, 2023 01:52PM
But what if older supercontinents? … Compared with Pangaea, those lost worlds seem truly lost. As with all geological evidence, the older it is, the less survives, the more mangled it has become and the harder it is to interpret.
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