Thursday, January 17, 2013

The Core

           All too frequently, when speaking of our goals and our ideals, we are admonished to get down to Earth and reminded that we need to be grounded in reality, "grounded” being the common metaphor for not putting on airs or acting superior and for associating with others as equals. Let us be honest; we tend to admire that every-day-grounded person as one who is somehow more real than the rest of us, that somehow that person has tapped into the secret of true honesty.

         In metaphysics, grounding is presented as a method of visualizing our centered energy as a stream going down into the earth to either provide a shield for protection against negative energies or as a method to connect ourselves with the energy of the planet.

But let us ask ourselves: what exactly is this ground that we are encouraged to seek, to bond with, to be allied with. In very real literal terms, what is it that we want to be associated with.  What are we truly asking for.  What are we admiring.  Remember, it is important that we use the right words and have the right thoughts to attain both our material and spiritual goals.  Who was is that said “Be careful what you pray for, you might get it”?

Let us take a simple look at a photograph of this Earth, this ground.

At the top level, we have the Crust, the outermost layer of our ground, running from zero to thirty-one miles deep, roughly the distance from Reno NV to Carson City NV.  The familiar landscape on which we live (rocks, soil, and seabed), it is composed of a variety of igneous, metamorphic, and sedimentary rocks.

The next level of our ground is the Mantle, which starts at about six miles deep and runs down another 1,806 miles.  This distance would roughly equal the mileage between Chicago IL and Las Vegas NV.  The boundary between the Crust and Mantle is conventionally defined by a contrast in seismic velocity, which is why we see the depth variation numbers.  The Mantle layer consists mainly of magnesium-iron silicate minerals, such as olivine and pyroxene.  It has an upper molten part and a lower solid part.  Many people think of molten part as lava, but it is actually rock so hot that it flows under pressure, like road tar.  This creates very slow-moving currents as hot rock rises from the depths and cooler rock descends.

The next level down in our ground is the Outer Core at a depth of 1,806 to 3,219 miles.  Starting from where your feet touch the surface of the planet, this would roughly be equivalent of getting in your car in San Francisco CA and driving to Key West FL.  It is believed to be liquid iron, nickel and sulfur, and very hot, perhaps 7,200 to 9,000 degrees Fahrenheit.

The final level of our ground is the Inner Core at a depth of 3,219 to 3,981 miles, which leads us down to the kernel of the Earth.  Get back into your car, this time in Vancouver, British Columbia, and drive all the way to Halifax, Nova Scotia, and you would have a pretty good idea of how deep 3,900 miles might be.  This deepest layer is a solid iron ball, about 1,500 miles in diameter, and is thought to be solid, primarily iron, with nickel and sulfur, plus small amounts of other elements.  Estimates of its temperature vary between 9,000 and 13,000 degrees Fahrenheit.  Although this Inner Core is white hot, the highest temperature region in the Earth, the pressure is so high the iron cannot melt.  Interestingly, recent evidence has suggested that the Inner Core may rotate slightly faster than the rest of the planet.

Except at the Crust level of our ground, the interior of the Earth cannot be studied by drilling holes to take samples.  Scientists map the interior by watching how seismic waves from earthquakes are bent, reflected, sped up, or delayed by the various layers.  Each earthquake provides a glimpse of the Earth’s interior.

It is worth noting that it was from interpretation of the data from a 1929 earthquake in New Zealand that brought Danish seismologist Inge Lehmann to the theory that the Earth’s center consisted of a solid inner core surrounded by a liquid outer core.  How many people out there are aware that a woman developed the most major theory in modern geology?

Okay, so why the science lesson?  This all falls under the aforementioned category of “Be careful for what you pray for, you might get it” and also Buddha’s admonition “With our thoughts we make the world.”

            In the everyday sense of grounding, being frozen paralyzed, unable to breathe or move. . all of this results from being trapped in a solid ball of iron (not to mention death!).  If we are grounding ourselves in the metaphysical and spiritual sense, visualizing those tree roots running deep deep deep into the planet’s center, do we really want to spiritually shackle ourselves to a ball of solid iron?
 
            You might say, “Oh, come on now; isn’t this all a bit of over-reaching?”  I say no.  Neurolinguistics tells us of the connection between our words and thoughts, and hence our actions.  We must become more aware of what we say, and how and what we think.  We must be more aware and sensitive of the words we use to process thoughts, ideas, desires and beliefs.  Out of these words, thought or spoken, our lives evolve. 
 

            Until next time, LLAP!
 
 
References:
Chang, Kenneth (2005-08-25). "Earth's Core Spins Faster Than the Rest of the Planet". The New York Times. Retrieved 2010-05-24
 
 
 
 

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