Question About The Earth's Core and Marianus Trench
If the earth's core is so hot and the magma is so hot in the volcanoes close to the surface then why isn't the Marianus Trench warm or hot at the bottom?
Let's separate this into pieces. The Earth's core is small and at the center of the earth, over 2,000 miles down. The Marianas Trench, where the Earth's crust is thinnest, allows the Earth's mantle (not core) to be very close to the seabed.
And the Marianas trench is warm. The temperature increases as you get deeper. At the bottom of the trench, there is a very thin layer of hot rock. I think it is about 300 degrees, but I may be out of date about that (not that it's changed, but there is newer research.) The rock not far beneath that is magma - molten rock of the Earth's mantle, and it is a couple of thousand degrees.
Water is a very good conductor and convector of heat. The water of the vast ocean of the Marianas trench is constantly receiving heat from the Earth's mantle and rising. It is so hot that, if it were at sea level and not under pressure, it would boil. But it rises, and is quickly replaced by cool water, which is heavier and flows in.
So the Marianas Trench acts like a radiator, constantly cycling in cool water to cool the hot rock just beneath the trench.
Thank you very much for that information. The question arose in my mind after I watched the New Evidence of Mermaids and such. They said that the water was colder and darker but being so close to the center I thought it would be warmer instead.
The water is darker and under greater pressure. And, in the general depths, being further from the sun, also colder. But right near the earth warmed by magma, and at undersea vents, it is hotter.
by Christina7 years ago
Okay, I will try to explain this as best as I can....I have a wesite. I also have a program that I purchased online that submits my websites to 200 of the top serach engines in 6 different countries. I have...
by Sherry Hewins21 months ago
I hope Robin will come by and comment on this one. I have been going through all of my old comments and deleting any that don't add anything to the conversation, but some of my hubs have a ton of very useful and...
by Dorsi Diaz6 years ago
I am in the new HP ad program and have a question about the earnings. At the top of the graph it says I have earned $6.02 under the last 7 days revenue but under the daily earnings underneath it shows 0.Does this mean I...
by Holle Abee5 years ago
Can I go ahead and write hubs for the food contest and post them on HP as unpublished? Then I could just click "publish" on the right day for the topic. Also, how do I post a hub to the contest? Be kind - this...
by Cynthia Sylvestermouse3 years ago
In our most recent product review lenses, the Amazon product was the featured intro. photo. Can we continue to use those Amazon product images as our introduction photo or do we need to change them?
by azimimpossible7 years ago
ARE THE WORKS AND EFFORTS OF TABHLIG'S AND JAMAT WORTH IN SPREADING THE WORD OF ALLAH AROUND THE GLOBE?MOST OF THE MUSLIMS HAD STARTED FOLLOWING THIS CONCEPT AND IT INCLUDES MANY BIG NAMES.
Copyright © 2018 HubPages Inc. and respective owners.
Other product and company names shown may be trademarks of their respective owners.
HubPages® is a registered Service Mark of HubPages, Inc.