Does not address the point. Ignores the existence of cold dense zones in the mantle near subduction zones, as observed through seismoc tomography. The Asthenosphere near a spreading ridge is provably hot. The Asthenosphere near a trench is provably cold. Lateral convection happens. This quote also appears to make several false claims - for example, andesitic back arc vulcanism requires differential melting - something that is provided for in subduction. How long is a piece of string? Seriously though... How long does it take something moving at 15 cm/yr to move 300 km? Beats me. I imagine that's determined by, among other things, mantle physics. This is a false claim, based on a mis conception - clearly the pacific ocean has shrunk by over 20% as the Atlantic has opened. Having said that, there are two (obvious) possible futures at this point. The atlantic continues to expand until the pacific is closed off, or largely closed off, resulting in North West America merging with North East Asia. Or. The currently passive continental margins of the atlantic become active subduction zones (there is some evidence this may already be happening in the south atlantic) then, which ever closes comes down to which is spreading faster. Are you suggesting that the Mantle is Granitoid? Actually, you've got this completely around the wrong way. Continental crust has a high granite content, and is less dense than Oceanic crust, that's why it tends to sit higher. But tell me something, if the mantle is granitoid, then how does it produce an ultra mafic magma? You keep saying this, but it's wholy irrelevant. Are you denying the existence of Oceanic trenches? Are you denying the trend so clearly demonstrated in the data I have presented you? And for at least the Fourth time, spreading alone is insufficient. Especially not when earthquake data from spreading ridges reveals a different trend. I can promise you that the oceanic trench in question is NOT a spreading ridge. That's not what's been suggested here. This is a strawman, and an appeal to ignorance. What's the volume of a 20 km wide asteroid compared to the volume of the earth? Insignifcant. What's the mass of a 20 km wide asteroid compared to the earth? Insignifcant. How many 20 km wide asteroids have hit the earth in the last 620 million years? A handfull (it's an extinction event). "Runcorn [1964, 1966] showed how paleotidal and paleorotational data can be used to explore whether Earth’s moment of inertia has changed over geological time. Such analysis also can examine whether Earth’s radius has increased significantly with time, as required by the hypothesis of Earth expansion, because Earth’s moment of inertia would increase with secular increase in radius." George E Williams, 1999. "The late Neoproterozoic rhythmite data do not support significant change in Earth’s moment of inertia and radius over the past 620 Myr." - George E Williams, 1999.
The same could be said of you. Given that you regularly resort to lying, abuse, quoting out of context, or quoting factually inaccurate articles written by questionable authors.
Clearly you don't understand seismology. I happen to know the best seismologist in the world, namely Stavros T. Tassos, at the National Observatory of Athens, and he clearly disagrees: http://aapg.confex.com/aapg/2007int/techprogram/A113674.htm Of course that's no surprise since you aren't a scientist. ROFL. What evidence? In the Quran? Granite is under the basalt...Please Register or Log in to view the hidden image! Your geological ignorance is amusing. No. I deny they subduct. Yes. What you call data I call mythology. Why? How do you know the Earth isn't growing? Because you read it in the Quran? You don't understand earthquakes: http://www.cprm.gov.br/33IGC/1284030.html You say that as though your promises mean something to me. Ah I see. Meteorites have no mass. Very scientific.
Oh good god. When i'm feeling more polite, I might reply to this in detail, but for now I have nothing more to say to a lying ignorant zealous religous fundamentalist, as demonstrated by the bolded portions. This post of OIM represents nothing more then a sreies of orchestrated lies and fallacies. I did not say that Meteorites have no mass, I said their mass was neglibile when compared to that of the earth. Average density of (solid) Granite: 2.69 Average density of (solid) Basalt: 3.01 http://www.simetric.co.uk/si_materials.htm IN the area those previous maps were done, the Pacific plate is moving (approx) North West at 82 cm/yr, and the Indo-australian plate is moving (approx) north at 63 cm/yr. http://elainemeinelsupkis.typepad.c...2007/04/02/tectonic_plate_movements_earth.jpg Please Register or Log in to view the hidden image!
For the world's best seismologist, he doesn't have much of a publication record...I found one paper, using ScienceDirect, he has authored back in 1992. He's even last author on that paper. Where are the peer-reviewed papers if his ideas are so worthwhile? Just some food for thought...
Try using Google. It works wonders. Where are your peer reviewed papers? Where are Trippy's? If 50 million fundamentalists peer review a paper that says there is no continental drift, does that mean there is no continental drift? If the cardinal peers say the heavens are unchanging, does that discredit Galileo?
It's a better idea than asking a moron a question about geodynamics. Does anyone (who isn't a babbling moron) know how much matter the earth loses into space every year? Or what the amount that's added from space is? The figures would be estimates, natch. (Only a moron surely, could think we might track the amounts somehow.)
For anyone else besides Trippy who thinks meteorites have no mass and are "insiginificant" see here: http://oilismastery.blogspot.com/2008/09/mass-accretion-on-mars-more-evidence.html
I'm curious. How does someone develop such a deep and troubling psychosis involving such a relatively esoteric subject as PT?
right...so the evidence i've been spoonfeeding you isn't enough? You want references? Fine. Here's peer reviewed literature that deals with mantle convection: M. Gurnis, Nature, 332, 695 (1988). M. Gurnis, S. Zhong, Geophys. Res. Lett., 18, 581 (1991). M. Gurnis, S. Zhong, J. Toth, The history and dynamics of global plate motions, AGU, Geophysical Monograph 121, pp. 73, (2000) J. P. Lowman, G. T. Jarvis, Geophys. Res. Lett., 20, 2087 (1993). J. P. Lowman, G. T. Jarvis, J. Geophys. Res., 104, 12,733 (1999). S. Zhong, M. Gurnis, Geophys. Res. Lett., 22, 981 (1995) Anderson, D. L., Top-down tectonics, Science, 293, 2016 (2001). Anderson, D. L., A statistical test of the two reservoir model for helium, Earth Planet. Sci. Lett., 193, 77 (2001). Anderson, D. L., 2001, How many Plates?, Geology, 30, 411 (2002). Anderson, D. L. Plate Tectonics as a Far- From- Equilibrium Self-Organized System, in Plate Boundary Zones, ed. S. Stein, AGU Monograph, (2002). Cizkova, H., Cadek, O., van den Berg, A.P. and N.J. Vlaar, Can lower mantle slab-like seismic anomalies be explained by thermal coupling between the upper and lower mantles? Geophys. Res. Lett., 26, 1501-1504, 1999. Here's some more general references that relate to mantle convection: Agee, C. B. and Walker, D., Mass balance and phase density constraints on early differentiation of chondritic mantle, Earth Planet. Sci. Lett., 90, 144 (1988). Anderson, D. L., Theory of the Earth, Blackwell Scientific Publications, Boston, pp. 366 (1989). [Chapter 8 is relevant to irreversible stratification of mantle and low U in the lower mantle.] Anderson, D. L., Where on Earth is the Crust?, Physics Today, March 1989, 38-46. (1989). Clark, S. P., and Turekian, K. K., Thermal constraints on the distribution of long-lived radioactive elements in the Earth: Phil. Trans. R. Soc. Lond., 291, 269-275 (1979). Coltice, N., and Ricard, Y., Geochemical observations and one layer mantle convection: Earth Planet. Sci. Lett., 174, 125-137 (1999). Conrad, C. P., and Hager, B. H., Mantle convection with strong subduction zones: Geophys. J. Int., 144, 271-288 (2001). Cordery, M. J., Davies, G. F., and Campbell, I. H., Genesis of flood basalts from eclogite-bearing mantle plumes: J. Geophys. Res., 102, 20,179-20,197 (1997). Cserepes, L., Yuen, D. A., and Schroeder, B. A., Effect of the mid-mantle viscosity and phase-transition structure of 3D mantle convection: Phys. Earth. Planet. Int., 118, 135-148 (2000) Davaille A., Simultaneous generation of hotspots and superswells by convection in a heterogeneous planetary mantle: Nature, 402, 756-760 (1999). Davies, G. F., Dynamic Earth: Plates, Plumes and Mantle Convection: Cambridge University Press, Cambridge, 458 pp. (2000). Gu, Y., A.M. Dziewonski, S. Weijia, and G. Ekstrom, Models of the mantle shear velocity and discontinuities in the pattern of lateral heterogeneities, J. geophys. Res., 106, 11,169-11,199 (2001). King, S. D., and Anderson, D. L., An alternative mechanism of flood basalt formation: Earth Planet. Sci. Lett., 136, 269-279 (1995). Ritsema, J., H.J. van Heijst, and J.H. Woodhouse, Complex shear wave velocity structure imaged beneath Africa and Iceland, Science, 286, 1925-1928 (1999). Schubert, G., Turcotte, D., Olson, P., Mantle convection in the Earth and planets: C. U. Press, 956 pp. (2001). Scrivner, C. and Anderson, D. L., The effect of post Pangea subduction on global mantle tomography and convection: Geophys. Res. Lett., 19, 1053-1056 (1992). Tackley, P. J., Mantle convection and plate tectonics: Toward an integrated physical and chemical theory: Science, 288, 2002-2007 (2000). Tackley, P., Three dimensional simulations of mantle convection with a thermo-chemical basal boundary layer: in: M. Gurnis, M. et al., eds., The Core-Mantle Boundary Region, Washington, AGU, 334 pp. (1998). Turcotte, D.L. and G. Schubert, in Geodynamics, John Wiley & Sons, New York, 450 pp. (1982). Wen, L. and Anderson, D. L., Layered mantle convection: A model for geoid and topography: Earth Planet. Sci. Lett., 146, 367-377 (1997). Wen, L. and Anderson, D. L., Slabs, hotspots, cratons and mantle convection revealed from residual seismic tomography in the upper mantle: Phys. Earth Planet. Int., 99, 131-143 (1997). http://jspc-www.colorado.edu/~szhong/mantle.html Here's a list of references that deal specifically with details that relate to why the earths moment of inertia hasn't changed substantially in the last 620 Ma (or more) Allen, J. R. L., Mud drapes in sand-wave deposits: A physical model with application to the Folkestone Beds (Early Cretaceous, southeast England), Philos. Trans. R. Soc. London, Ser. A, 306, 291–345, 1982. Allen, J. R. 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A., Tidal deposits from the Archaean Moodies Group, Barberton Mountain Land, South Africa, Sediment. Geol., 18, 257–281, 1977. Ewers, W. E., and R. C. Morris, Studies of the Dales Gorge Member of the Brockman Iron Formation, Western Australia, Econ. Geol., 76, 1929–1953, 1981. FitzGerald, D. M., and D. Nummedal, Response characteristics of an ebb-dominated tidal inlet channel, J. Sediment. Petrol., 53, 833–845, 1983. Fujioka, K., K. Kobayashi, K. Kato, M. Aoki, K. Mitsuzawa, M. Kinoshita, and A. Nishizawa, Tide-related variability of TAG hydrothermal activity observed by deep-sea monitoring system and OBSH, Earth Planet. Sci. Lett., 153, 239–250, 1997. Goldreich, P., History of the lunar orbit, Rev. Geophys., 4, 411–439, 1966. Hambrey, M. J., and W. B. Harland (Eds.), Earth’s Pre-Pleistocene Glacial Record, 1004 pp., Cambridge Univ. Press, New York, 1981. Hansen, K. S., Secular effects of oceanic tidal dissipation on the Moon’s orbit and the Earth’s rotation, Rev. 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E., Upper Proterozoic tidal rhythmites, South Australia: Sedimentary features, deposition, and implications for the earth’s paleorotation, in Clastic Tidal Sedimentology, edited by D. G. Smith et al., Mem. Can. Soc. Pet. Geol., 16, 161–177, 1991. Williams, G. E., History of Earth’s rotation and the Moon’s orbit: A key datum from Precambrian tidal strata in Australia, Aust. J. Astron., 5, 135–147, 1994. Williams, G. E., Precambrian length of day and the validity of tidal rhythmite paleotidal values, Geophys. Res. Lett., 24, 421–424, 1997. Williams, G. E., Late Neoproterozoic periglacial aeolian sand sheet, Stuart Shelf, South Australia, Aust. J. Earth Sci., 45, 733–741, 1998a. Williams, G. E., Precambrian tidal and glacial clastic deposits: Implications for Precambrian Earth-Moon dynamics and palaeoclimate, Sediment. Geol., 120, 55–74, 1998b. Yoder, C. F., Astrometric and geodetic properties of Earth and the solar system, in Global Earth Physics: A Handbook of Physical Constants, edited by T. J. Ahrens, AGU Ref. Shelf, 1, 1–31, 1995. Should I go on? Or are you willing to concede that I can cite a wider range of peer reviewed literature to support my argument then you can? So much for no evidence.
That's not what I said you lying dishonest ########! I specificaly stated that they were insignificant in mass when compared to the earth. The all important piece of context that you leave out. And yeah, a few Gigatons is pretty insignificant when compared to compared to a few million million gigatons. Ceres, the largest body in the Asteroid belt has a mass 4 orders of magnitude less than that of the earth (one ten thousandth). Once again, you try and humiliate or antagonize me only to prove your own lack of basic numeracy skills.
The point, though, is that the total amount of matter making up the planet varies, because some is lost and gained constantly. Yet there is zero evidence the overall mass is changing noticeably. So an expanding earth hypothesis needs to get around that little problem, too.