On 3/11/25 5:04 AM, Richard Heathfield wrote:
On 11/03/2025 09:23, Peter Moylan wrote:
Deep underground, the pressure is so high that no voids canThat can't be right. I read a book about just such a journey. *Clearly*
exist. No caves, so no journey to the centre of the earth.
you don't know what you're talking about!
Pressure at the center of Earth is about 3.7 million atmospheres! You
can guesstimate it by using the main three approximate densities
involved:
basalt: 5 grams/cc
liquid iron: 11 grams/cc
solid iron: 13 grams/cc
The top part, basalt, is about 3000 km thick.
The middle part liquid iron is about 2000 km thick.
The core solid iron is about 1500 km radius.
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