Hello! Can you help me with Earth science?
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Hello! Can you help me with Earth science? 

Igneous rocks are classified by their texture and composition. The two main types of igneous rock textures that you have learned about are aphanitic and phaneritic. Rocks with aphanitic texture formed by rapid cooling at Earth’s surface (extrusive), such that there was not sufficient time for large crystals to develop. Therefore, aphanitic rocks do not have mineral crystals that can be seen with the unaided eye. They are very fine-grained. Phaneritic rocks, on the other hand, form by slow cooling deep within Earth (intrusive), such that there was sufficient time for large crystals to develop. Therefore, phaneritic rocks have mineral crystals that can be seen with the unaided eye. They are coarse-grained.

Igneous rock composition ranges from felsic to ultramafic. Felsic rocks have high silicon content and are usually lighter in color and in density than mafic and ultramafic rocks. Mafic and ultramafic rocks have relatively low volumes of silicon and are usually dark-colored and denser.

In this lab, you will have the chance to see some igneous rocks, to identify their texture and composition, and to assign a name to them.  You will need to download the blank data sheet for entering your lab observations.


Please look at the blank data sheet i have attached. I just need the boxes from 10-14 filled in. 

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earth science Igneous Rock Identification lab solution.docx
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