Sedimentary facies of the Gulf Coastal plain developed primarily in response to ____
a. transgression of the Zuni sea
b. regression of the Zuni sea
c. transgression of the Tejas sea
d. regression of the Tejas sea
e. regression of the Gulf of Mexico
d
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________ is by some accounts the world's largest industry
Fill in the blank(s) with the appropriate word(s).
The isotope composition of ________ in foraminifera shells from sediment cores are used to determine climate change in Earth history.
A. oxygen B. carbon C. lead D. helium E. uranium
Trade winds drive ocean surface waters ________ along the equator
A) northward. B) southward. C) westward. D) eastward. E) northeasterly.
Water diversion and irrigation has allowed humans to grow crops in areas where natural supplies have been limited. A major challenge that exists in these regions has been ________
A) high trophic-level efficiency B) high pesticide use C) soil erosion D) low crop diversity E) salinization of soils