They don't even know what causes gravity.Maybe I'll suggest this to my astronomist flatmate when I get home...
If you have any constructive arguments for or against then please post.
The best thing about Finance Minister Bill English\'s latest Budget is that it does finally signal a much greater role for the private sector in the New Zealand economy. And another step along the way to extract this country from the political cul-de-sac in which Helen Clark\'s Labour Government parked us.
I'm reading 'A Brief History of Everything' too, but i mustn't have gotten up to this chapter yet.
dirtytape is that your theory or are you quoting?what about the multiple impacts? surely they would just turn the inside of our planet to noise and it'd become hugely unstable?what about gravity? I dont know how the insides of a planet effect gravity...sounds like a good start though, I shal ponder further on this....probably when im standing in my store staring out into space...
/me twists your hypothesis slightly...You are assuming that the impact is from a solid object ie an asteroid, what happens if the impact crater was caused by a different stellar event, ie black/worm hole passing though the planet ? would this explain the coaxial events better ?To me, a shock wave through water (assume magma has similar properties) moves in a bell shape (ripples) as the energy dissipates. To have enough energy to effectively punch out a hole on the far side would require a bulk load of energy.
Interesting theory. Taupo is a "super-volcano", it's last eruption was in 86AD. Perhaps there is a crater on the other side of the earth that corresponds to it's location?
Firstly, It's DirtyApe not DirtyTape.
If my hypothesis is correct then there definitely should be one. How long ago the collision occurred though needs to be established.
Hmm, didn't some dirty big asteroid hit Spain a long time ago? That would be about the location you'd need. Though i'm assuming that you don't take subduction (plate tectonics) into account, or do you think the asteroids exacerbate it's effects?
I have a hypothesis about why super volcanoes, and potentially why other volcanoes exist.I have called this the Asteroidal Impact Coaxial Volcanic Projection hypothesis (AICVP hypothesis).Impacts on the planet surface transfer force through the Earth's viscous interior and displace magma which is projected to the opposite side of the planet from the point of impact.A sufficiently massive enough impact could displace enough of the viscous interior to produce a "bubble" of force that could take thousands of years to travel through the planets interior and bubble out the opposite side.
So I thought of Olympus Mons, biggest volcano in the Solar System. And surfed to Google Mars. After some measuring I found that on the opposite side of Olmypus Mons is one of the largest Impact craters in the solar system. Excellent, this did not disprove the hypothesis.
But going by the available evidence, a crater can be confirmed as being caused by a asteroid by checking for the presence of Iridium in the surrounding soil (Iridium is not naturally occurring on Earth).
Given a Phanerozoic time-integrated oceanic/continent crustal ratio > 2.5 and the difficulty in identifying oceanic impacts, I suggest the effects of large impacts on thin thermally active oceanic crust–capable of triggering regional to global mafic volcanic events and ensuing environmental effects–provide an essential clue for understanding the relationships between impacts and volcanic events which, separately or in combination, result in deleterious environmental effects, in some instances leading to mass extinctions.
In the search for a triggering mechanism for the Paleocene–Eocene (P–E) boundary event, 55 Ma, centimeter-resolution chemical (e.g., Ir, Os, Pt) and isotope (e.g., 187Os/188Os, 3He/4He, 87Sr/86Sr) records across this boundary have been established for six uplifted marine sections in Egypt, Spain and Denmark.....High-sensitivity analyses failed to uncover evidence of extraterrestrial element or isotope enrichments in the six sections, refuting the hypothesis of a major comet impact at the boundary....The environmental perturbations at the Paleocene–Eocene boundary appear to have been triggered by basaltic volcanism, but any model for the detailed causal relation remains speculative.
Volcanic contributions to the K/T boundary environment probably include increased Platinum Group Element (PGE) and acid rain fall out, particularly from large scale mantle upwellings e.g. Deccan, Cameroon and Coral Sea events. A previously proposed post-K/T Greenland starting plume apparently already existed in the Cretaceous. K/T features such as the Iridium (Ir) anomaly most likely include longer term volcanic as well as sudden meteoritic impact contributions. Volcanic contributions were greatest from Southern Hemisphere sources, whereas meteorite impacts featured in the Northern Hemisphere.
An oval shaped unusual positive gravity anomaly (10 000 km2 in area) near Bombay has attracted our attention during a search for an impact site near Deccan basalts. A detailed gravity interpretation indicates the presence of a fossil conduit structure of 12 km height extending from a shallow crust-mantle boundary (at 18 km) to an approximate depth of 6 km from the surface. The conduit structure, with a maximum diameter of about 35 km at its base, may originate from cracking of a weak pre-Deccan trap shallow upwarped mantle. The structure may have been caused by a bolide impact which triggered the eruption of massive flood basalts (Deccan traps) on the western margin of the fast-moving Indian plate. An impact in this locality can explain the sudden detachment of the arcuate Seychelles block from India as well as the large-scale reorganisation of plate boundaries in the Indian Ocean.
As for your theory, I read recently that there is a scientist who believes the Permian-Triassic mass extinction may well have been caused by a massive asteroid/comet hitting the earth near Antarctica.
Environmental and Biotic Changes during the Paleozoic-Mesozoic Transition]The prolonged and multi-phase nature of the Permo-Triassic crisis favours the mechanisms of the Earth's intrinsic evolution rather than extraterrestrial catastrophe. The most significant regression in the Phanerozoic, the palaeomagnetic disturbance of the Permo-Triassic Mixed Superchron, widespread extensive volcanism,and other events, may all be related,through deep-seated processes that occurred during the integration of Pangea. These combined processes could be responsible for the profound changes in marine, terrestrial and atmospheric environments that resulted in the end-Permian mass extinction. Bolide impact is possible but is neither an adequate nor a necessary explanation for these changes.
Though i'm assuming that you don't take subduction (plate tectonics) into account, or do you think the asteroids exacerbate it's effects?
is there a super volcano that matches your hypothesis with the massive crater in mexico?this one:http://en.wikipedia.org/wiki/Chicxulub_craterand if plate tectonics are taken into effect is it possible that some asteroidal impacts are pushed into the molten earth if a corresponding volcano doesnt have a impact crater?
too tired to discuss in detail, but there was an interesting article in analog a year or 2 back about plumes in the magma, and the theory that these natural convection currents coincide with major volcanic activity.I was going to try and explain but Wiki has already done it.. awesome!!
Antipodal hotspots and bipolar catastrophes: Were oceanic large-body impacts the cause?One aspect of the hotspot distribution that has received little attention is its antipodal character. Of 45 ‘primary’ hotspots found in most hotspot compilations 22 (49%) form antipodal pairs within observed hotspot drift limits (≤ 20 mm/yr). In addition, the available ages, or possible age ranges, for both hotspots of an antipodal pair tend to be similar (≤ 10 Myr difference) or overlap. Monte Carlo simulations indicate that the antipodal primary hotspots' locations and ages are not due to chance at the > 99% confidence level (p < 0.01). All hotspot pairs include at least one oceanic hotspot, and these are consistently opposite those hotspots related to large igneous provinces (LIPs) and continental volcanism. A mechanism of formation is considered in which minor hotspot volcanism is induced at, and flood basalt volcanism is triggered by seismic energy focused antipodal to, oceanic large-body impact sites. Because continental impacts are expected to have lower seismic efficiencies, continents possibly acted as shields to the formation of antipodal hotspot pairs. Published numerical models indicate that large oceanic impacts (10-km-diameter bolide) generate megatsunami capable of altering coastal depositional environments on a global scale. Past impact-generated megatsunami, consequently, could have left widespread stratigraphic records, possibly misinterpreted as indicating large rapid changes in eustatic sea level, and widely disrupted continental and marine sediment reservoirs responsible for abrupt changes in the isotopic composition of seawater. Phanerozoic mass extinction events, therefore, might have resulted primarily from catastrophic megatsunami in a dominantly oceanic hemisphere and the near contemporaneous effusion of vast quantities of noxious gases from flood basalt eruptions in a dominantly continental one.
I started by looking on Google earth plugin to go to the exact opposite side of the planet.
Originally Posted by Global and Planetary ChangeVolume 55, Issues 1-3, January 2007, Pages 1-20 Environmental and Biotic Changes during the Paleozoic-Mesozoic Transition]The prolonged and multi-phase nature of the Permo-Triassic crisis favours the mechanisms of the Earth's intrinsic evolution rather than extraterrestrial catastrophe. The most significant regression in the Phanerozoic, the palaeomagnetic disturbance of the Permo-Triassic Mixed Superchron, widespread extensive volcanism,and other events, may all be related,through deep-seated processes that occurred during the integration of Pangea. These combined processes could be responsible for the profound changes in marine, terrestrial and atmospheric environments that resulted in the end-Permian mass extinction. Bolide impact is possible but is neither an adequate nor a necessary explanation for these changes.
