Why does crustal balancing yield different estimates of extension than summing fault heaves across many rifts?
What will be an ideal response?
Answer: The difference is wholly or partly due to the fact that subseismic fault heaves are not incorporated in fault heave-based estimates of extension. In addition, there may be processes affecting the lower crust (assimilation) that change the crustal thickness.
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In what ways do metamorphic rocks differ from the igneous and sedimentary rocks from which they formed?
What will be an ideal response?
Why must geologists understand the magnitude of geologic time?
a. The magnitude of geologic time spans billions of years and thus differs greatly from the magnitude of time people deal with on an everyday basis (e.g., hours, weeks). b. Most fossils are found in the very oldest rocks on Earth, dating back 4600 years ago. c. Most fossils are found in the very oldest rocks on Earth, dating back 4600 million years ago. d. Geologic time deals mostly in 1000-year increments. e. The magnitude of geologic time spans thousands of years and thus differs greatly from the magnitude of time people deal with on an everyday basis (e.g., hours, weeks).
The Ominous "Russian Cross" refers to
a. the primary symbol of Orthodox Christianity. b. the country's population as displayed on an age structure diagram or population pyramid. c. their geographical location at the intersection of Europe, the Middle East, Asia, and the Arctic. d. an iconic intersection in their transportation network that supplied troops during WWII and ultimately saved Stalingrad from German occupation.
Which of the following is not a component of soil?
A. living organic material B. All are components of soil. C. water D. minerals E. dead organic material