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Metamorphic Rock Notes, Chapter 6.2, pages 133-139 Page 133 _______________ and ___________________ increase with depth. What does the term metamorphism mean? ______________________________________ True or False. During metamorphism, a rock changes form while remaining solid. Label the grades of metamorphism on the figure below: Low grade, Intermediate grade, High grade. Page 134 Define regional metamorphism: _______________________________________________ __________________________________________________________________________ Page 135 Define contact metamorphism: _______________________________________________ _________________________________________________________________________ When very hot water reacts with rock and alters its chemistry and mineralogy, __________________________ metamorphism occurs. Page 136 Wavy layers and bands of ________________________ characterize _________________ metamorphic rocks. __________pressure during metamorphosis causes ___________________ with flat or ________________ crystals to form with their long axes perpendicular to the ________________________. 2 most common types of foliated 1 metamorphic rocks are ____________________, which is derived from shale and _________________ which is derived from __________________________. ___________________________ metamorphic rocks lack ___________________________ with long axes in one direction. Non-foliated rocks are composed mainly of _____________________ that form with __________________________________. 2 common examples of non-foliated rocks are ________________________ and __________________________. Define porphyroblast: _______________________________________________________ __________________________________________________________________________ Page 137 How do minerals change without melting? _______________________________________ __________________________________________________________________________ Most metamorphic rocks reflect the original ______________________________________ of the ________________________________. Gneiss, for example, has the same chemical ______________________ as _____________________. How do valuable ore deposits like gold and copper form? ___________________________ __________________________________________________________________________ Page 138 What is the rock cycle? _______________________________________________________ __________________________________________________________________________ True or False. Any rock can change into another type of rock. Once a rock forms, does it remain the same type of rock forever? ____________________ Page 139: Copy and label Figure 6-21 on page 139 2 Check for understanding What 2 forces are responsible for metamorphism? ________________________________ Igneous intrusions will cause what type of metamorphism? ________________________ Large regions of crust affected by increased heat and pressure is what type of metamorphism? ____________________________ 3