GEO Week 4

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ybxrl1000

Science

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Using the Key and the Rock Images Guide, identify the 21 rocks.  On the Word file provided, list the identified rocks by number, and briefly explain how you identified each.

GEO101L_Lab4_Key - Rocks.pdf 

GEO101L_Lab4_Rock_Images.pdf 

GEO101L_Lab4_Answer sheet - Rocks.docx 

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1.  Igneous Grain  visibility Texture/composition Name Properties Quartz  Present Granite Large  grained;  peachy-­‐pink  grains  of  orthoclase   and  the  transparent  grains  of  quartz Quartz  Absent Diorite Similar  to  granite,  but  not  orthoclase  or  quartz Glassy Obsidian Scoria Pumice Black;  glassy  texture Dark  in  color;  porous Light  in  color;  porous Fine  grains Basalt Rhyolite Dark  gray-­‐black;  only  very  small  crystals  visible Peachy-­‐pink;  only  very  small  crystals  visible Grain  size Grain  type Grains  are  not  Shells Name Breccia Conglomerate Fossiliferous  Limestone   Coquina Properties Large  angular  grains Large  rounded  grains Fossils  imbedded  in  considerable  matrix Fossils  imbedded  in  very  little  matrix Sandstone Oolitic  Limestone Does  not  react  to  acid Reacts  to  acid Shale Chert Petrified  Wood Thinly  bedded Very  smooth  and  angular Characteristics  of  wood  preserved Grains  are  Obvious Vesicular  (porous) Grains  aren't  Obvious 2.  Sedimentary Grain  visibility Grains  are  Large Grains  are  Shells Grains  are  Visible Grains  are  Not  Large Grains  are  not  Visible 3.  Metamorphic Grain  visibility Banding Banding  Present Name Gneiss Marble Properties Grains  align  in  bands Granular;  will  effervesce  in  acid Banding  Absent Phyllite Garnet  schist Fine,  but  visible  grains Large,  12-­‐sided  garnets  imbedded  in  matrix Slate Dark  colored;  flat  on  top  and  bottom Grains  are  Visible Grains  are  not  Visible 1   3:  side  view   2   3:  top  view   5   4   6:  top  view   6:  side  view   7:  two  varia5ons   8   9   11   10   12   13   14-­‐side  view   14-­‐top  view   16   15   17   18   18   19   20   21   21   Identify the following rocks using the Key provided. Place the names with the appropriate number. Basalt, Breccia, Chert, Conglomerate, Coquina, Diorite, Fossiliferous Limestone, Garnet schist, Gneiss, Granite, Marble, Obsidian, Oolitic Limestone, Petrified Wood, Phyllite, Pumice, Rhyolite, Sandstone, Scoria, Shale, Slate 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21.
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Anonymous
Really useful study material!

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