Marble is one of the most beautiful naturally occurring rocks. It's why it's in our homes, floors, and art sculptures. In this piece, the marble is just below Richard Henry Dana's feet where his name is stated. Now that you know where the marble is, let's discuss how it's formed.
The first thing you need to make marble is dead organic matter and a lot of it. This comes from dead sea life that over millions and millions of years have sank to the bottom of the ocean. Overtime, these layers of dead organic matter become hardened due to the weight of more dead material being laid against it. This newly formed rock is called limestone.
Overtime, the ocean moves and the sea floor gets deeper at a subduction zone, at convergent plate boundary. Here, the rock subjects over the continental crust because it is more dense. Eventually, the rock reaches the upper mantel and begins to melt. Depending on how long, how deep, and the type of rock can determine the outcome. Limestone, when melted naturally forms marble, thus making it a metamorphic rock. This rock is exposed close to the surface when the plate starts to rise instead of subducts.
Works Cited
http://geology.com/rocks/marble.shtml
www.quora.com
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1. Two Years Before the Mast on the first line of your email.
2. Describe the texture AND color of marble at this location.
3. Describe the weathering process of this rock. Is there any rusting or corrosion? If so, where do you see it and why is this occurring?
4. Why are there no fossils in this rock even though marble was originally limestone?
5. Would you expect to see fossils in this rock if you split it open?