No recent resurfacing,Re: Salt on Venus
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From: John Curtis on 31 May 2010 12:54 On May 30, 8:19 pm, Sam Wormley <sworml...(a)gmail.com> wrote: > > Atmosphere of Venus > http://en.wikipedia.org/wiki/Atmosphere_of_Venus > "Through studies of the present cloud structure and geology of the > surface combined with the fact that the luminosity of the Sun has > increased by 25% since around 3.8 billion years ago, it is thought that > the atmosphere of Venus up to around 4 billion years ago was more like > that of Planet Earth with liquid water on the surface...." > During Late Heavy Bombardment oceans served to cushion the impactors from cratering the ocean floor. Thus, "recent resurfacing" is not necessary to explain the craterless surface of Venus; evaporation of oceans will do. Examples are the lack of craters on the floors of Earth's oceans, dearth of craters on lunar mare and northern plains of Mars. http://www.stumblerz.com/if-your-wife-is-running-after-you-with-a-rifle-is-it-best-to-hide-under-the-water/ John Curtis
From: Andrew Usher on 31 May 2010 23:48 John Curtis wrote: > During Late Heavy Bombardment oceans served to > cushion the impactors from cratering the ocean floor. > Thus, "recent resurfacing" is not necessary to explain > the craterless surface of Venus; The surface of Venus is much younger than that (the oldest age I've seen is max. 1200 Myr). Oceans do not cushions sufficiently large impactors, either. > evaporation of oceans > will do. Examples are the lack of craters on the floors > of Earth's oceans, This is mostly because Earth's ocean floor is very young (even younger than Venus's s7urface.). Andrew Usher
From: Sam Wormley on 1 Jun 2010 13:53 On 5/31/10 11:54 AM, John Curtis wrote: > During Late Heavy Bombardment oceans served to > cushion the impactors from cratering the ocean floor. Got an evidence for you assertion, John? Please cite!
From: Dirk Bruere at NeoPax on 1 Jun 2010 20:56 On 02/06/2010 00:58, Brad Guth wrote: > On May 31, 8:48 pm, Andrew Usher<k_over_hb...(a)yahoo.com> wrote: >> John Curtis wrote: >>> During Late Heavy Bombardment oceans served to >>> cushion the impactors from cratering the ocean floor. >>> Thus, "recent resurfacing" is not necessary to explain >>> the craterless surface of Venus; >> >> The surface of Venus is much younger than that (the oldest age I've >> seen is max. 1200 Myr). Oceans do not cushions sufficiently large >> impactors, either. >> >>> evaporation of oceans >>> will do. Examples are the lack of craters on the floors >>> of Earth's oceans, >> >> This is mostly because Earth's ocean floor is very young (even younger >> than Venus's s7urface.). >> >> Andrew Usher > > Correct, and especially the Arctic ocean basin may be only 12,600 some > odd years old. > > There's very little other than large meteors or small asteroids of > nearly solid nickle-iron that made any dent in that surface of Venus, > primarily because it's newish atmosphere was simply too thick and > dense. > > How do we objectively know that Venus is any older than the Sirius > star system? http://en.wikipedia.org/wiki/Sirius Stars 25x the luminosity of Sol do not last long -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: Brad Guth on 1 Jun 2010 22:32
On Jun 1, 5:56 pm, Dirk Bruere at NeoPax <dirk.bru...(a)gmail.com> wrote: > On 02/06/2010 00:58, Brad Guth wrote: > > > > > On May 31, 8:48 pm, Andrew Usher<k_over_hb...(a)yahoo.com> wrote: > >> John Curtis wrote: > >>> During Late Heavy Bombardment oceans served to > >>> cushion the impactors from cratering the ocean floor. > >>> Thus, "recent resurfacing" is not necessary to explain > >>> the craterless surface of Venus; > > >> The surface of Venus is much younger than that (the oldest age I've > >> seen is max. 1200 Myr). Oceans do not cushions sufficiently large > >> impactors, either. > > >>> evaporation of oceans > >>> will do. Examples are the lack of craters on the floors > >>> of Earth's oceans, > > >> This is mostly because Earth's ocean floor is very young (even younger > >> than Venus's s7urface.). > > >> Andrew Usher > > > Correct, and especially the Arctic ocean basin may be only 12,600 some > > odd years old. > > > There's very little other than large meteors or small asteroids of > > nearly solid nickle-iron that made any dent in that surface of Venus, > > primarily because it's newish atmosphere was simply too thick and > > dense. > > > How do we objectively know that Venus is any older than the Sirius > > star system? > > http://en.wikipedia.org/wiki/Sirius > Stars 25x the luminosity of Sol do not last long > > -- > Dirk > > http://www.transcendence.me.uk/- Transcendence UKhttp://www.blogtalkradio..com/onetribe- Occult Talk Show Correct, except Sirius(B) at <9 solar masses was likely 50<100 times the luminosity of Sol. Some suggest that Sirius is only 250 million years old, and others have suggested <600 million years. Either way, Sirius is a very newish star/solar system. ~ BG |