Many shoreline shapes represent a dynamic balance between sediment delivered to the shore by streams and erosion from wave action. Explain how a beach or spit might change over time because of variations in these two processes
What will be an ideal response?
A beach will grow seaward, and a spit will extend parallel to the overall trend of the shoreline, when the amount of sediment delivered by streams increases, or the wave energy decreases, or both. Erosion of sediment will likely occur if the sediment delivered by streams decreases, the wave energy increases, or both.
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A) ?Matthew Maury B) ?Captain James Cook C) ?Christopher Columbus D) ?Wyville Thompson (of the Challenger expedition)
Which of the following geologic situations is most likely to contain significant oil concentrations?
A) 1.1-billion-year-old rocks that accumulated in the vicinity of a divergent plate boundary B) 200-million-year-old rocks that have been exposed by uplift in a subduction zone C) 300-million-year-old rocks that accumulated in a subsiding sedimentary basin D) 150-million-year-old rocks that are flat lying and unfaulted
Australia has always maintained an "open-door" policy to immigrants from Asia and the Middle East
a. True b. False Indicate whether the statement is true or false
A seamount is a: a. small, extinct volcano that peeks above the sediment
b. volcano that rises above the sea surface. c. volcano that is flat on top, showing that it once was above sea level. d. large active or inactive volcano that is entirely below the sea surface.