Igneous Rock Identification Sample 1 1. give it some thought: different igneous rocks of the same mineral composition 2. give it some thought: extrusive, intrusive, and porphyritic igneous rocks 3. lab activity 5.1 categorizing igneous rocks 4. lab activity 5.2 crystal textures of igneous rocks 5. lab activity 5.3 recognizing glassy and vesicular textures within igneous rocks 6. Lab 4: volcanoes, plutons, and igneous rocks. introduction. igneous rock forms when magma (molten rock) cools and crystallizes. volcanic eruptions take place when magma reaches the surface before it solidifies. the magma flows onto the surface as lava, or erupts explosively as rapidly expanding gas propels bits of lava and rock outward.
Igneous Rock Lab Sample R Examine one of the provided igneous rock specimens (rock samples a–f). the igneous rocks that are in your set are (in no particular order): granite, obsidian, basalt, rhyolite, scoria, gabbro. determine if the rock is a light shade, dark shade, or somewhere in between (compared to the other specimens). Select the answer that best describes the texture and composition of this sample. granite is an intrusive igneous rock and coarse grained. it has a felsic composition. view the image of sample b. this igneous rock that is intermediate in composition and has a coarse grained texture. identify sample b. diorite. 5. you will find the rock name where the color column and the texture row come together on the igneous rock identification table. 6. complete the data table 1 and answer the questions that follow. save your work, and submit the completed lab worksheet in canvas. purpose (5 pts) write a 1 2 sentence purpose statement for this lab. Lab 3 igneous rocks 1. five of your samples have a coarse grained ‘phaneritic’ texture from the slow cooling of a magma. what are the names of these 5 samples ? 2. compare the 5 phaneritic igneous rocks and give me one good characteristic that could be used to easily distinguish each one. 3.
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