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Chapter 5-3 Elsakka
Sedimentary rocks
| Question | Answer |
|---|---|
| What is sediment? | Small, solid pieces of materials that come from rocks or living things. |
| What carries and deposits Sediment in layers? | water wind, and ice |
| What are the four steps to the process that forms sedimentary rock? | Erosion, Deposition, Compaction, Cementation. |
| Erosion | water or wind carry away sediments |
| Deposition | sediment settles to the ground. |
| Compaction | process that presses sediment together |
| cementation | sediment is "glued" together to form rock |
| What are the 3 main groups of sedimentary rocks? | Clasic, Orgainic, Chemical rocks |
| Clastic Rocks | sedimentary rock that form when rock fragments squeeze together(forms from sediments of rock) |
| Shale | example of clastic rock that forms from tiny particles of clay |
| Sandstone | example of clastic rock that forms from the sand on beaches, on the ocean floor, in river beds , and in sand dunes. |
| Conglomerate and breccia | example of clastic rock |
| Organic Rocks | forms where the remains of plants and animals are deposited in thinck layers.( |
| Coal | example of organic rock that forms from the remains of swamp plants buried in water. |
| Limestone | example of Organic Rock |
| Chemical Rock | Forms when minerals that are dessolved in a solution crystallize |
| rocksalt (halite) | example of chemical rock |
| gypsum | example of chemical rocks |
| Uses of Sedimentary Rock? | Building materials, decoration, cement, and gravel |
| How does sedimentary rock form? | They form when sediments or the remains of dead plants and animals are compressed. |