Geology How is granite made

simply bio 3, textbook

A2 –W, E– Examine a piece of granite and answer the questions. Then label B6 as well. What shape is your piece of granite? round / oval / square / angular Take the piece of rock in your hand. How does it feel? warm / cold / smooth / rough / firm / crumbly B6 granite How many main components does granite consist of? Make a sketch in your biology notebook and label the individual components (feldspar: depending on the variety, white to reddish, opaque, matt; quartz: gray, transparent, shiny; mica: black to light brown flakes, sometimes shiny). At a glance When molten rock (magma) solidifies from inside the earth, solidification rocks (magmatites) are formed. Depending on where the magma solidifies, a distinction is made between deep and effusion rocks. Deep rocks (plutonites) are formed when viscous magma slowly cools down and solidifies (granite, gabbro) already inside the earth. Outflow rocks (volcanic rocks) are formed when thin-flowing magma solidifies on the surface of the earth after volcanic eruptions (basalt, rhyolite, obsidian). A3 –W– Read the text on the granite. Find and underline the 7 words in the text that do not match. These words make up a mnemonic. Granite - the most famous deep rock, and that ’! The granite is the best known representative of the deep rock (plutonite). Like all solidification rocks (magmatites), it is formed from feldspar molten rock (magma). Granites are solidified in quartz of great depth. The cooling was slower than with the volcanic rocks and the crystals had more time to grow. Granites are coarse-grained and mica free from fossils. Identifying features are the large crystals made from the minerals feldspar, quartz and mica. The very hard rocks are very resistant to three external influences. Granite is used in forgotten road and path construction, in hydraulic engineering or as track ballast. Granite is used for paving stones and landmarks or facade cladding. Ground and polished granite is used for floors, countertops and window sills. Granite is also never worked by stonemasons (for gravestones) or by sculptors (for sculptures and statues). 53 Geology For testing purposes only - property of the publisher öbv

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