What are some of the visible evidences of the widespread use of the township and range land survey system all across the midwestern United States?
What will be an ideal response?
The region looks homogenous, with patterns of its physical geography appearing organized and predictable, with rectangular fields and linear highway and rail connections making this region look like a giant checkerboard from the air. Small towns appear at fairly regular intervals, and large cities appear less regularly.
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An index fossil must be:
a) limited to a particular region b) very rare c) long-lived in terms of geologic time d) easily identifiable in the field e) all of the above
Which of the features labeled on the accompanying figure was discussed as a possible source of earthquakes?
A. the cliff at A B. the volcano at B C. pumping of the oil field at C D. shaking during large floods at D E. landslides off the mountains at E
Which of the following minerals is a silicate?
A) halite B) calcite C) hematite D) feldspar
Once water has been contaminated with sewage, it is impossible to restore it to drinking-water quality.
Answer the following statement true (T) or false (F)