What role did microplates and terranes play in the formation of Pangaea? Provide an example
Numerous terranes or microplates of various sizes were involved in Paleozoic orogenic events. For example, the microcontinent of Avalonia separated from Gondwana in the Early Ordovician and existed as a separate continent until it collided with Baltica during the Late Ordovician-Early Silurian and then with Laurentia later in the Silurian. During the times when the microplates were separate from the larger continental masses they developed their own unique floral and faunal assemblages.
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What is resonance and what conditions cause it? Give examples
What will be an ideal response?
The geothermal gradient, on average, is about ________.
A. 2500°C/km B. 30°C/km C. 2.5°C/km D. 25°C/km E. 0.004°C/km
Spreading centers are an ideal location for volcanism because ________.
A. the oceanic plates pull apart causing hot asthenosphere rock to rise and undergo decompression melting to form magma that continues to rise B. they sit above the high-temperature asthenosphere C. the asthenosphere rock has low percentages of SiO2 D. All of these choices are correct.
Fortunately, logging, slash-and-burn agriculture, and civil war have not impacted the Congo basin.
a. true b. false