Materials: Geology.com ( https://geology.com/rocks/ ) as a reference. Rock pictures available in in the Google folder “Pictures for Rocks Lab” Part 1 - Igneous Rocks 1. The texture of igneous rock is typically described as phaneritic, aphanitic, glassy, or vesicular. Briefly describe what each of these textures means, and how it relates to the rate of cooling to form the rock. Texture Description Rate of Cooling Phaneritic Aphanitic Glassy Vesicular 2. Using the website and your lecture notes, state the texture for each of the following rocks. Rock Texture Gabbro Rhyolite Obsidian Andesite Pumice Granite Basalt Diorite 3. The composition of igneous rock is typically described as felsic, intermediate, mafic, or ultramafic. The composition of the igneous rock is determined by the minerals that are in the magma or lava that forms the rock. State the type of color that is found in igneous rocks of each type of composition. (Choose from light, dark, dark greenish, and in between light and dark. ) Composition Color Felsic Intermediate Mafic Ultramafic 4. Using the website and your notes, state the composition (felsic, intermediate, mafic, ultramafic) for each of the following rocks. Rock Composition Gabbro Rhyolite Obsidian Andesite Pumice Granite Basalt Diorite 5. Complete the following table to identify the pictures of igneous rocks. Texture: phaneritic, aphanitic, glassy, or vesicular Composition: felsic, intermediate, mafic, or ultramafic Igneous Rock Name: Basalt, granite, etc. Number Texture Composition Igneous Rock Name 1 2 3 4 5 6 7 8 Part 2 - Sedimentary Rocks 1. Sedimentary rocks are classified by the materials that most directly make up the rock. Briefly describe the three basic types of composition for sedimentary rocks. Composition Description Clastic Chemical Organic 2. Using the website and your lecture notes, state the composition of each of the following types of rocks. Rock Composition Sandstone Coquina Shale Bituminous coal Limestone Conglomerate 3. Carbonate minerals, such as calcite (CaCO3) will undergo a chemical reaction with HCl to create CO2, which is a gas at room temperature. Therefore, when HCl is applied to these minerals, they will bubble or fizz. Considering which carbonates we have discussed, and which sedimentary rocks are made of these minerals, complete the chart below with which rocks you would expect to produce bubbles when you apply HCl. Rock Produce bubbling when HCl is applied? Sandstone Coquina Shale Bituminous coal Limestone Conglomerate 4. Complete the following table to identify the pictures of sedimentary rocks. Composition: clastic, chemical, or organic Mineral Composition ( for chemical sedimentary rocks only! ): state dominante mineral present Reaction with HCl: if reaction with HCl is expected, based on chemical composition Sedimentary Rock Name: sandstone, bituminous coal, e.