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6th grade - SMS: Grand Canyon Vocab.

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differential erosion   occurs where a mountain or a plateau is made of both soft, weak rocks, and harder more resistant rocks; the weaker rocks wear away faster, leaving behind knobs and cliffs of more resistant rocks  
formation   rock layer composed of more than one kind of rock; the kinds and sequences of the rock can be recognized from one place to another  
elevation   vertical distance measure above sea level  
rock column   sequence of rocks  
plateau   large, nearly level area of land that is lifted or elevated above the surrounding area  
limestone   mostly smooth rocks, with fine-grain texture that contain calcite (and react to hydrochloric acid by fizzing to release carbon dioxide)  
sandstone   rocks with sandy, rough texture that do NOT react to hydrochloric acid  
correlation (correlate)   the relationship or connection between rock layers from two or more locations (rocks that are connected or RELATE)  
calcite   mineral compased of calcium, carbon and oxygen; this is the material in rocks that reacts to acid  
shale   smooth-textured rock that contains fossils  
sample   small, representative pieces  
layers   flat deposits of rock that can be thick or thin and extend over a large area  


   


 

 

 

 

 

 
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