Classification of Sedimentary Rocks
Write whether these rocks are clastic (detrital), organic, or chemical
Name ______________________________
Period _____________
Date ___________
1. _________________These rocks are NOT made from pieces of preexisting rock.
2. _________________Minerals get into the spaces between sediments and glue them together.
3. _________________Formed from the remains of once-living organisms
4. _________________Limestone that forms from calcite directly from ocean water (no living
organisms) as crystals grow together.
5. _________________Formed through the compaction and cementation of sediments
6. _________________Sometimes contains fossils
7. _________________Clay, silt, sand, and Gravel give these sedimentary rocks their gritty, rough
textures
8. _________________Rocks made completely of shell fragments are called coquina.
9. _________________Formed as a result of weathering and erosion
10. _________________Formed when water evaporates and leaves behind mineral deposits
Formed when water evaporates and leaves behind mineral deposits
11. _________________These rocks most likely have layers.
12. _________________Shells accumulate on the ocean floor and become cemented together.
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_______________
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Write whether these rocks are clastic (detrital), organic, or chemical (KEY)
Name ______________________________
Period _____________
Date
_______________________
1. Chemical These rocks are NOT made from pieces of preexisting rock.
2. Clastic Minerals get into the spaces between sediments and glue them together.
3. Organic Formed from the remains of once-living organisms
4. Chemical Limestone that forms from calcite directly from ocean water (no living organisms) as
crystals grow together.
5. Clastic Formed through the compaction and cementation of sediments
6. Organic Sometimes contains fossils
7. Clastic Clay, silt, sand, and Gravel give these sedimentary rocks their gritty, rough textures
8. Organic Rocks made completely of shell fragments are called coquina.
9. Clastic Formed as a result of weathering and erosion
10. Chemical Formed when water evaporates and leaves behind mineral deposits Formed when
water evaporates and leaves behind mineral deposits
11. Clastic These rocks most likely have layers.
12. Organic Shells accumulate on the ocean floor and become cemented together.
Sandstone: Clastic
Conglomerate: Clastic
Fossil: Organic
Rock salt: Chemical