The mid-ocean ridges and rises are spreading centers where new oceanic crust is created.
Answer the following statement true (T) or false (F)
True
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In order to correlate age-equivalent rock units of dissimilar composition or to correlate rock units over
a large area, ____________________ and the principle of ____________________ must be used. Fill in the blank(s) with the appropriate word(s).
Which type of well can reach the Earth’s surface without additional pumping?
A. saturation well B. piezometric well C. sub-artesian well D. artesian well E. freestanding well
The pattern of expansion of the Russian Empire was characterized by which of the following?
A) expansion northward into the Arctic
B) rapid expansion in all directions simultaneously
C) slow but steady expansion to the east
D) rapid expansion to the west
E) rapid expansion to the south
How big was the meteorite that apparently caused the Cretaceous-Tertiary mass extinction?
A) 1 km B) 10 km C) 100 km D) 1000 km