The rock shown here, with sediment just visible to the naked eye, is a
A. conglomerate.
B. sandstone.
C. shale.
Answer: B
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Phosphate can be sequestered from the phosphorus cycles for long periods of time in
A. running water. B. marine sediments. C. the atmosphere. D. phytoplankton. E. rivers.
What was the first expedition devoted entirely to marine science? What new equipment was used on
this expedition to facilitate more research? What information was acquired? What will be an ideal response?
Some of the oldest known rocks, which have been dated at about 4.0 billion years, are metamorphic
What does this tell us about the age of Earth?c What will be an ideal response?
A(n) ________ is formed on a floodplain when ground water seeps into a cutoff channel of a meandering river
A) cutoff lake B) cutbank C) oxbow lake D) natural levee