
Title text: I don't trust mantle/core geologists because I suspect that, if they ever get a chance to peel away the Earth's crust, they'll do it in a heartbeat.
There still isn't a post for today's comic? What is with you people?
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Ranbot wrote:The mantle geologist could move to Newfoundland, specifically, Gros Morne National Park where a piece of old mantle rock is exposed at the surface, called the Tablelands... https://www.internationaltraveller.com/ ... ros-morne/
(And an excellent vacation destination if you like hiking, geology, fjords, and beautiful natural sights in general)
WriteBrainedJR wrote:Ranbot wrote:The mantle geologist could move to Newfoundland, specifically, Gros Morne National Park where a piece of old mantle rock is exposed at the surface, called the Tablelands... https://www.internationaltraveller.com/ ... ros-morne/
(And an excellent vacation destination if you like hiking, geology, fjords, and beautiful natural sights in general)
I have so many questions about this. How does the Earth's mantle even become exposed, let alone end up so far above sea level and not, say, a hundred miles from Bumfuque, Middle of Nowhere, Abyssal Plane? How do scientists know that it's really the mantle?
Okay, so two. I have two questions.
leeharveyosmond wrote:Core/mantle geologists aren’t the problem. It’s the astronomers you need to watch. They’d abolish the atmosphere if they could.
svenman wrote:Uh, as far as I know volcanism usually involves lava consisting of molten rock that originates from within the earth's crust, not the mantle. But I'm not a geologist.
Ranbot wrote:svenman wrote:Uh, as far as I know volcanism usually involves lava consisting of molten rock that originates from within the earth's crust, not the mantle. But I'm not a geologist.
A geologist would agree with that. (And FWIW, I am a geologist) Lava is not mantle, not physically, not mineralogically, not chemically. Gros Morne National Park is UNESCO World Heritage place in part because the mantle rocks there are not found anywhere else on the surface of the planet.
Ranbot wrote:A geologist would agree with that. (And FWIW, I am a geologist) Lava is not mantle, not physically, not mineralogically, not chemically. Gros Morne National Park is UNESCO World Heritage place in part because the mantle rocks there are not found anywhere else on the surface of the planet.
svenman wrote:Ranbot wrote:A geologist would agree with that. (And FWIW, I am a geologist) Lava is not mantle, not physically, not mineralogically, not chemically. Gros Morne National Park is UNESCO World Heritage place in part because the mantle rocks there are not found anywhere else on the surface of the planet.
...There must be different kinds of mantle rocks, though, right?
svenman wrote:...I found that there is at least one other place on Earth where (presumably different) mantle rocks are exposed at the surface, in Oman's Hajar Mountains.
Not even in Iceland? Those are (allegedly) photographs of the mid-Atlantic rift.Ranbot wrote:Lava is not mantle, not physically, not mineralogically, not chemically.
Yes, there definitely are. They are called gravity waves (which water waves are also called), and while I don't have any videos handy, they are on the net. Look for time lapse videos of looking down on clouds from mountaintops. Yes, some of them are cloud formation and dissipation, but you will also see gravity waves (you need the clouds to make them visible).Pfhorrest wrote:A tangential thought this reminds me of that I thought of recently: are there surface waves of the atmosphere, like there are of the oceans? Like, if you could see air as opaque, and you were in space, would you see ripples and waves undulating across the surface of the planet like it was a water-world?
Pfhorrest wrote:Pretty sure the stuff that comes out of oceanic rifts is crustal rock, albeit melted, since it goes on to form the crust.
Sableagle wrote:Not even in Iceland? Those are (allegedly) photographs of the mid-Atlantic rift.Ranbot wrote:Lava is not mantle, not physically, not mineralogically, not chemically.
Reka wrote:There still isn't a post for today's comic? What is with you people?
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