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Outline For Interactive Igneous Rock Story
Transcript of Outline For Interactive Igneous Rock Story
After numerous adventures through the rock cycle, I have finally gotten around to writing one of them down. I plan to make this an interactive story, so that the youngster rockies can get a better understanding of their life cycle. So it is technically not an adventure of my own--the youngsters get to decide what happens.
This is only the outline for the interactive story I have in mind; if you decide you like it, we'll see about the real version of the interactive piece of the story.
Hope you enjoy,
Granite Sedimor The Never Ending Rock Cycle
Narrated by Granite Sedimor
Story Plot Line by You It was only two centuries ago that I was reborn as an igneous rock, cooled from the molten mixture of the rocks and minerals of my ancestors.
However, my time has come again -- nature is on the move! You, my dear reader, are nature.
What shall you do? Whip the wind and whirl the water Yikes! It's gotten warm, don't you think?
And the pressure is immense! See that area? There's me, and the heat from the magma and pressure from the above layers -- it's changing me! The extreme heat and pressure you applied, nature, has changed me into a metamorphic rock.
Metamorphic rocks are formed from extreme heat and pressure, and are classified by their properties of being foliated or non-foliated.
As you can see, I am foliated. This means that
my mineral grains are lined up in parallel
bands. But my fellow metamorphic rock,
Marble here, is non-foliated, so his
mineral grains do not form layers. Phew, that's over.
What will you do next, nature? Add more heat and pressure! Whip the wind
and whirl the water Melt me into magma More heat and pressure equals the same thing: metamorphic rock. The rock cycle never ends, nature, so our rocky lives are always filled with options since any rock can be turned into another, including itself. Whiping wind and whirling water are a bad combo for rocks, nature.
It reduces them from this:
To this: This happens because of weathering and erosion.
Weathering is the breaking down of rocks,
which is caused by natural forces like wind
Erosion is the removal (movement)
of these broken down rocks, also
known as sediment. By applying the forces of wind and water, I too have been reduced to sediment. Overtime, sediment from broken-down rocks like me will start to form layers as new sediment is placed on top of the older ones. This will cause the bottom layers to compact and cement as the pressure from above layers grows with each new layer, forming new, layered rocks.
I, one of these rocks, am now classified as a sedimentary rock. Sedimentary rocks are any rock formed from compacted and/or cemented sediment, and since sediment can include once-living material, some sedimentary rocks can be organic. However, the three types of sedimentary rocks are:
detrital/clastic, chemical and organic. Add extreme heat
and more pressure! Whip the wind
and whirl more water Melt me into magma Repeating the process of weathering, erosion, compaction and cementation equals the same thing: sedimentary rock Remember nature, our rock-lives are endless: we can turn into any type of rock, including ourselves. Heat is really only needed here--though, lots of it!
Melted into magma, I would join my fellow rocks as a molten mixture of rocks and minerals deep under the Earth's surface.
By cooling, I would become igneous rock again, which is also often known as the "youngest" or "original" rock because it forms from magma or lava. Igneous rock is classified into two groups: intrusive and extrusive Extrusive igneous rocks are formed above the Earth's surface from lava (magma above the Earth's surface) and cool quickly, since they're exposed to the cooler air and water. They also form small crystals, since the crystals have less time to form. Intrusive igneous rocks are formed below the Earth's surface and cool slowly. Since they cool slowly, they tend to form large crystals. Add extreme heat and pressure! Whip the wind
and whirl the water Melt me into magma again Being melted into magma and cooled again equals the same thing: igneous rock This is because of the rock cycle, which states that all rocks, youngsters or not, can turn into any type of rock including itself. Done with weathering and erosion!
What will you do next, nature? Done with the melting.
What next, nature?