Devonian barrier-reef complexes were associated with evaporite deposition in the back reef platform
a. True
b. False
True
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Which of the following minerals are called framework silicates?
a) amphiboles b) feldspars c) olivines d) pyroxenes e) micas (biotite, muscovite, etc.)
This figure shows the geologic timescale. Which period listed below would be part of the Mesozoic?
A. Pennsylvanian B. Neogene C. Cambrian D. Mississippian E. Jurassic
Dead Zones are caused by ____ that introduce(s) nitrogen and phosphorus into aquatic ecosystems. These nutrients lead to algal blooms and subsequent hypoxic conditions when the _______drop below the level necessary to sustain most animal life. The Gulf of Mexico Dead Zone is caused by this phenomenon.
A. ocean acidification; pH levels B. non-point source runoff; dissolved oxygen levels C. point source polluters; CO2 levels D. volcanic eruptions; pH levels
The false color imagery of some aerial photographs uses ________ wavelengths
A) x-ray B) microwave C) near infrared D) sonar E) radar