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A vast collection of bees, termites, spiders, flies and ants dating back 53 million years has challenged assumptions about India's early history.
The bugs, preserved in lumps of amber, show that India was not cut off from the rest of the world before joining the Asian continent 50 million years ago.
For long periods when India was an island there must have been a flow of small creatures travelling between it and the mainland.
Rust and his colleagues, whose findings appear in the journal Proceedings of the National Academy of Sciences, believe long chains of volcanic islands may have allowed the bugs to mingle by 'island hopping'.
Until now the generally accepted theory was that the Indian sub-continent broke off from the East African land mass some 160 million years ago and floated through the oceans at a speed of 20 cm a year. If this theory was correct, India would have been isolated for 100 million years. Because of this 50-million-year-old amber deposit, the theory doesn't stand any more
Originally posted by PuterMan
Pangaea or something else? What do you think?
Longest journey The dragonflies are clearly migrating from India across the open sea to the Maldives, says Anderson. "That by itself is fairly amazing, as it involves a journey of 600 to 800km across the ocean," he says. Quite how they do it was a bit of a mystery, as in October at least they appear to be flying against the prevailing winds. However, in October, and continuing into November and December, a weather system called the Inter-tropical Convergence Zone moves southwards over the Maldives. Ahead of the ITCZ the wind blows towards India, but above and behind it the winds blow from India. So it seems that the dragonflies are able to reach Maldives by flying on these winds at altitude above 1000m.
Originally posted by m0r1arty
Originally posted by PuterMan
Pangaea or something else? What do you think?
Not expanding Earth that's for sure.
So how did the Aborigines get to Australia again?
-m0r
I have also found the expanding earth theory compelling, but I have some issues with expanding earth in combination with subduction zones. I am not sure we *would* have subduction zones if the earth were constantly expanding. Unless, of course, the mechanism is actually a combination of both expansion and drift.
Answer that and I might have a look at your idiotic* website
Question number 1: Where the feck is the water?
So anyway, suddenly, well, not suddenly we get water, and not just a little water. We got, according to science, so much water that we not only filled these gigantic basins 5 miles deep covering two-thirds no? Three quarters? You don't say? Okay 5 miles deep and covering three quarters of our Earth. What's that? Oh yeah, it also covered half to two thirds of our upper tectonic plate with another mile of water, to give us the shallow seas. "Warm seas? Salt water seas?"
Well, they couldn't be warm, right, cause they were connected with the oceans, and they also must be salt water, right?
No? Warm? Fresh water? I don't understand? They had to be connected with the oceans.. Had to be. Sea level would have to be a mile deeper.
The crust is constantly cracking and spreading exposing new young hard granite and silicate surface. Gasses are ejected (cause all elements are manufactured on the inside Earth, all elements. Yes. All. What else? All!! Some? No, all! ALL!)
As gravity increases gasses are held and fall as liquid water to the surface. This cools the Earth's surface more and the crust gets thicker.
Originally posted by PuterMan
This does not contain any expletives and that reference was to your use of the word 'feck' as an obvious replacement for another word as opposed to it's Irish usage of various different varieties - including that use in the vernacular.
Originally posted by PuterMan
If you are interested in a more technical discussion of the merits and failings of both theories you could try looking at Bill Mundy's site.
www.grisda.org...
There is a mass of references at the end of that article.
The lack of water is the number one reason why this theory falls flat on it's arse.
Originally posted by PuterMan
reply to post by m0r1arty
The crust is constantly cracking and spreading exposing new young hard granite and silicate surface. Gasses are ejected (cause all elements are manufactured on the inside Earth, all elements. Yes. All. What else? All!! Some? No, all! ALL!)
As gravity increases gasses are held and fall as liquid water to the surface. This cools the Earth's surface more and the crust gets thicker.
Now there are better descriptions than this, but the principle applies to both scenarios, the difference between the two being the timing.