Sedimentary Rocks Review Metamorphic Rocks Dr David Steer
- Slides: 13
Sedimentary Rocks: Review
Metamorphic Rocks Dr. David Steer
Rock Cycle
Metamorphic Rocks Change in composition and/or texture of a rock Occurs as the result of increasing pressure and/or temperature.
Regional Metamorphism Regional metamorphism occurs when rocks undergo increased temperatures and pressures Associated with the formation of mountain belts. Rocks may be buried to great depths (10 -20 km) l Temperatures in excess of 700 o. C and pressures of 7 kilobars (7 million atmospheres). l Increase in grain size Platy minerals become aligned (foliated) At high enough grades segregation of light and dark minerals occur (gneiss)
Regional Metamorphism Draw a schematic picture of the process
Examples of Regional Metamorphic Rocks Schist Forms when mudrocks are heated v. Gneiss v. Forms when rocks ranging from mudrocks to granites are heated and pressurized
Contact Metamorphism Contact metamorphism occurs when rocks come in contact with a heat source (usually a magma body). Essentially the rocks are getting baked, like in an oven. Grain size increases as the result of increased temperature. Grains are often randomly oriented
Contact Metamorphism Draw a schematic picture of the process
Review Two of these rocks are igneous, 2 are metamorphic and one is sedimentary. Which rocks most likely metamorphic? Temperature A B C Depth D E
Examples of contact metamorphic Rocks Marble forms when limestone is heated • Quartzite vforms when sandstone is heated
Create a Concept Map Key Words: regional metamorphism gneiss magma chambers contact metamorphism heat and pressure mountain belts grain size marble non-foliated rocks Linking phrases: surrounding can be formed by classified by caused by increasing that results in such as formed from an existing rock like associated with
Identify your metamorphic rocks
- Types of igneous rock
- Igneous rock to metamorphic rock
- Chapter 6 sedimentary and metamorphic rocks answer key
- Concept map of igneous rock with answer
- Sedimentary rocks turn into metamorphic
- A parent rock
- Igneous sedimentary and metamorphic
- Metamorphic sedimentary
- Is uluru sedimentary igneous or metamorphic
- How is magma formed
- Metamorphic sedimentary
- Illustration of rock cycle
- David steer
- Sedimentary weathering