1 / 17

THE ROCK CYCLE

THE ROCK CYCLE. BY: DANIELLE PERRY. INTRODUCTION. This slide show is intended to help you understand important types of rocks. The diagram in the next slide represents the ROCK CYCLE-a scheme that represents the processes of changes that connect the three major groups of rocks: SEDIMENTARY

krikor
Download Presentation

THE ROCK CYCLE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. THE ROCK CYCLE BY: DANIELLE PERRY

  2. INTRODUCTION • This slide show is intended to help you understand important types of rocks. • The diagram in the next slide represents the ROCK CYCLE-a scheme that represents the processes of changes that connect the three major groups of rocks: • SEDIMENTARY • IGNEOUS • METAMORPHIC • It also shows two other important parts of the “Rock Cycle”-SEDIMENTS and molten LAVA and MAGMA • Source: http://www.canadianrockhound.com/junior/rock cycle.html

  3. CLASSIFICATION OF ROCKS

  4. EXAMPLES OF NON-CLASTIC ROCKS

  5. SEDIMENTARY ROCKS Sedimentary rocks may be made of rock fragments-sediments-or by chemical reactions. The classification is shown below:

  6. SHALE ROCK • Shale is the most common sedimentary rock. • Sedimentary rocks cover about three quarters of the land surface. • For more about sedimentary rocks http:||www.rolcanoworld.org|vw docs

  7. SEDIMENTARY ROCKS • The most important of this is coal.

  8. IGNEOUS ROCKS • Form by solidification {crystallization} of melted minerals. • At the surface, LAVA hardens to form EXTRUSIVE rocks with tiny {FINE-GRAINED crystals or GLASSY {no crystal} TEXTURES. • Beneath the surface, MAGMA hardens to form INTRUSIVE rocks with easily visible {COURSE-GRAINED} crystal texture.

  9. Light-colored, coarse-grained, no pattern. • Mostly quartz, feldspar, mica, and hornblende. • Often used for buildings and monuments.

  10. Dark-colored, fine-grained, extrusive. • Formed where lava erupted onto surface. • Found locally in Palisades along west shore of Hudson River, Connecticut River valley.

  11. Dark-colored coarse-grained intrusive • Similar composition to basalt-plagioclase feldspar with some pyroxene, and olivine.

  12. Obsidian • Natural volcanic glass. • Forms when lava cools very quickly. • Usually dark, but small pieces may be clear. • Fractures along curved {conchoidal} . • Used as spear, and arrow points,and knives.

  13. PUMICE and RHYOLITE

  14. METAMORPHIC ROCKS • Formed by heat and pressure changing existing rocks. • REGIONAL METAMORPHIC affects a large area and results from plate tectonics. • CONTACT METAMORPHISM affects rocks on a local scale, such as “baking” sedimentary rocks next to magma or lava. • For more information: • http:/www.volcanoworld.org/vwdocs/vwdocs lessons/lessonsMetrocks/Metrocks1.html

  15. FOLIATES, SLATE,GNEISS,SCHIST

  16. NON- FOLIATES

More Related