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1. +4 A geologist studies a sequence of sedimentary rocks exposed along a route to your school. She reports that there are 25 meters of rock units exposed; the rocks are all horizontal in orientation (they are not deformed in any way); and there are two types of rocks based on the minerals found. The lower 20 meters is comprised of silicate minerals present in subrounded particles between 0.5 mm in diameter to 1.5 mm in diameter. The upper 5 meters is comprised of carbonate minerals with a grain size determined only through microscopic examination. All the grains show crystal edges as the rock is examined under the microscope. One of the rocks is a sandstone; the other is limestone. Which is which, and what is the rationale for your answer?

2. +4 Speculate as to what you believe would remain if a 1000-liter volume of normal sea water were allowed to evaporate. Assume that there is no biologic component to the water you are going to evaporate.

3. +4 There are substantial limestone deposits in Jefferson and Berkeley counties in the eastern panhandle, and there are also substantial limestone deposits in Greenbrier and Monroe counties. Because the rocks are the same, were these rocks formed at the same time (that is, can we correlate them)? What evidence would be required to determine if they are in fact of the same age?

4. +4 A geologist has studied fossiliferous limestone samples from quarries near Lewisburg, Elkins, and Morgantown, and the report is that the brachiopods and other invertebrate forms found in the samples are identical. Armed with this information, what are you able to suggest with respect to the correlation of these rock units in West Virginia?