Reference no: EM13187453

1. Which statement is true? 

1.Both chert and limestone may have either chemical or biochemical origin. 
2.Flint, jasper, agate, and petrified wood are all varieties of the siliceous rock chert. 
3.Gypsum and halite are evaporite minerals. 
4.Chemical sedimentary rocks are crystalline in texture. 
5.All of the above are true statements. 

2. Ripple marks on a bedding plane: 

1. suggest you're looking at an old delta. 
2.are parallel to the current direction that created them. 
3.could suggest an ancient stream bed or a seashore. 
4.are a sure sign the area had periodic drought. 
5.all of the above are true.

3. What is the most logical past environment to have produced a deposit consisting of layers of well-sorted sandstone with cross beds several meters high? 

1. alluvial fan along a mountain front 
2.sand dunes 
3.shallow-water carbonate area 
4.small-lake environment 
5.glacial valley

4. What is the most logical past environment to have produced a deposit consisting of layers of unsorted, unstratified sedimentary clasts, clay-sized to boulder-sized? 

1. floodplain 
2.sand dunes 
3.shallow-water carbonate area 
4.small-lake environment 
5.glacial valley