On and off for years my desktop background was of Tunnel
View from Yosemite National Park with a fantastic view El Capitan the amazing granite
cliff. I was trilled to finally see it
in person. My kids were curious about how
it formed, talking about how it looked like a giant axe was used to split the
rocks in half. I informed that this particular
cliff was a type of igeous rock and it originally formed deep under the earth where
it was “lava” hot. This was not the same
as lava because it cooled off over a long time and then the shifting earth
pushed it high up from the ground and towards the sky. My middle son then asked me how I could possibly
know how it cooled off? I told them it
is because of the rock composition. I
can see that the rock is granite, not only because of the light color, but also
because of the coarse-grain or large crystalline structure. It was site worth seeing and even better to
share with my family.
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