These economic mineral deposits are common in Carboniferous and Permian strata in the
northeastern part of the U.S., where they formed as organic sediments (i.e., the remains of plants)
deposited in wetland environments west of the Appalachian Mountains:a.
gold d. coal
b. uranium e. archaeocyathid
c. platinum
D
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What are some of the political, cultural, and environmental factors that make the Golden Triangle a major source of illicit drugs?
What will be an ideal response?
A perusal of a world climate map shows that similar climates are located:
A) at similar latitudes. B) on similar continents. C) at similar elevations. D) at similar longitudes.
The principle of ________ states that an original sedimentary layer extends laterally until it tapers or thins at its edges.
A. superposition B. cross-cutting relationships C. lateral continuity D. actualism E. original horizontality
Debate over the use of DDT to control malaria is likely to continue. However, over the past several decades, much has been learned about how this insecticide works, and why its extensive use poses an environmental concern. Discuss three characteristics
of this chemical that cause it to be problematic. What will be an ideal response?