[Turtle]

Originally Posted by CharlieO

Gentlemen,

Finally got some time to myself and happily reviewed the many comments posted since my last visit. Most impressed with the details, reasoning, efforts and assumptions - “It is thought,” etc.

Delay has been due to care-giving, something I pray you will all be spared as you grow older. Not how I planned to spend my retirement or a career I trained for in the past.

Please rest assured, many good points were raised by you for which I will have an observation or two in the future, when I find more time to consider them more fully and compose my answers. Can’t say enough about how much this exchange has helped me survive mentally.

One question. If physical testing by Carnegie Institute and others in the past has established the fact than Iron becomes too dense at core pressures to be Earth’s core, does anyone know what is currently believed to be the composition of Earth’s core? This would help me with some of my observations. [I haven’t been able to spend much time of late to surf the Internet and learn of the latest assumptions.]

Thanks to all, “I’ll be back.” CharlieO

Hey! What are you doin' with my ol' shoes? No matter. Stretch your brain learning to tie them one-handed, with both the left & right hands.

I think this article that I mentioned in post #68 is the 'latest & greatest' I have run across on the subject. >> Mystery Of Earth's Innermost Core Solved

Don't burn your lip on that hot green tea.

[Moontanman]

Originally Posted by CharlieO

Gentlemen,

Finally got some time to myself and happily reviewed the many comments posted since my last visit. Most impressed with the details, reasoning, efforts and assumptions - “It is thought,” etc.

Delay has been due to care-giving, something I pray you will all be spared as you grow older. Not how I planned to spend my retirement or a career I trained for in the past.

Please rest assured, many good points were raised by you for which I will have an observation or two in the future, when I find more time to consider them more fully and compose my answers. Can’t say enough about how much this exchange has helped me survive mentally.

One question. If physical testing by Carnegie Institute and others in the past has established the fact than Iron becomes too dense at core pressures to be Earth’s core, does anyone know what is currently believed to be the composition of Earth’s core? This would help me with some of my observations. [I haven’t been able to spend much time of late to surf the Internet and learn of the latest assumptions.]

Thanks to all, “I’ll be back.” CharlieO

What do you mean by Iron is too dense at the Earth's core? It has been thought the Iron at the Earth's core was compressed in to a super dense crystalline structure that couldn't exist at the surface. At one time it was thought that solids could not be significantly compressed but modern research has disproved this. At temps higher than the surface of the sun and compressed into a super dense crystalline structure the iron is atypical to say the least but too dense? The pressure would certainly make it as dense as was necessary to resist the pressure wouldn't it?

[Eclogite]

Moontanman,
Charlie has cited, on this or another thread, research that purports to rule out the possibility of iron forming the core of the Earth based upon pressure/density considerations. I can find nothing in on-line literature searches to indicate this research has been duplicated or widely accepted. All the material I have found on the core acknowledges and accepts that iron dominates the composition. This is true even when you have some radical theories such as the uranium core.