Compare and contrast sedimentation in the Sundance Sea and the Cretaceous Interior Seaway in
the Mesozoic. What will be an ideal response?
ANS:The
Morrison Formation was deposited associated with the Sundance Sea. These deposits are
mostly derived from weathering and erosion of mountains formed during the Nevadan orogeny.
These sediments include sandstones, mudstones, shales, and occasional conglomerates and they
contain many dinosaur fossils as well. In contrast, the sediments deposited in the Cretaceous
Interior Seaway were distinguished by a succession of transgressions and regressions and
included detrital sediments as well as carbonates. At the end of this period, coal deposits were
formed in part of this area.
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The diagram below conveys the idea that
A) oceanic subduction zones are areas where ecosystems are particularly rich.
B) biogeochemical cycles store and cycle matter across the different spheres.
C) diversity is only one indicator of an ecosystem's health.
D) life tends to exist in clumps with little between the productive areas.
Natural sources of air pollution come from ________
A) soil dust, wildfires, and volcanic dust B) evaporation of solvents C) internal combustion engines D) birds E) coal-fired electrical plants
What causes the Sun's heat?
A. energy release from nuclear fusion B. energy release from nuclear decay C. energy release from nuclear fission
Central America, Middle America, and South America are three terms that refer to geographic areas of Latin America. Describe the areas each of the three terms represents