. . .Yeah . . . that's the way of geologic processes over geologic time . . . they (processes) build stuff up . . . then break stuff apart . . . such is the constant antagonism between heat and gravity!!
That region reminds me a log jam (of continental and ocean plate pieces, all jambed together . Which does suggest massive flow toward that location.
Yes, these extrusions are the results of massive mantle upwellings along the east asian margin. These upwellings emerge at the surface and spread. It's popping out everywhere in the area, eventually tearing apart the continental margin, and encroaching on the old pacific lithosphere (>120 My).
How do you get that isolated section of old ocean floor in the middle of the pacific? (latitude 10 - 20 degree North) Please Register or Log in to view the hidden image!
Does it consider decompression as a possible cause? I want to be educated on that aspect only. Please Register or Log in to view the hidden image! Compression is the answer!
Well, that's one interpretation anyway. It's really not that odd, and it ties in nicely with some of the isochrons around Zelandia.
Of course not. He's a geologist, and every geologist knows that everything in their field goes against that hypothesis.
Well would I spend 300 bucks on a book that wouldn't help? Please Register or Log in to view the hidden image!Please Register or Log in to view the hidden image!
Oh yeah, I read that piece of crap in Nature. Someone has to tell them that there is the Mid Atlantic Ridge spreading in the arctic, which, far from getting extinct, is now propagating in eastern Russia. Please Register or Log in to view the hidden image!
Is that the thin line going through Siberia? That won't split there. I'd say there is too much back-pressure transmitted via North America.
What does Wiki say? http://en.wikipedia.org/wiki/Laptev_Sea_Rift The Laptev Sea Rift is a divergent tectonic plate boundary between the North American Plate and the Eurasian Plate located on the Arctic Ocean coast of northeastern Siberia in Russia. The Laptev Sea Rift is the continuation of the Gakkel Ridge (Mid-Arctic Ridge) into the continental crust of Siberia. It starts offshore in the continental shelf and continues onshore to a point located in the Chersky Range where the boundary motion changes from extension to compression. So there is a compression (back-pressure) rather that extension. Please Register or Log in to view the hidden image!
Pay special attention to where the merger is predicted to happen: Please Register or Log in to view the hidden image!
The rift is a divergent boundary, that compression is not part of the rift. I've seen this one already and it is ludicrous. They predict that Kamtchatka will close the arctic oceans while it has done exactly the opposite for eons. Let computers modeling guys that don't know shit about geology and this is what you get. Actually, I'm not surprised that you swallow that bullshit.