Disconformities exist between parallel layers of sedimentary rocks, and consequently, are hard to identify. What
geologic process must occur for an unconformity to develop? What is one way to identify a disconformity, other than
numerical dating? What will be an ideal response?
Unconformities develop due to erosion, periods of non-deposition, or a combination.
Disconformities can be identified easily by comparing the fossil assemblages above and
below the unconformity. In all likelihood, the fossil assemblages will be different due to the
elapsed time.
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Plasma gasification is a technology that uses arcs of electricity in the absence of ____ to produce very high temperatures for vaporizing trash.
A. water B. hazardous chemicals C. coal D. oxygen E. carbon dioxide
A space probe flying in remote outer space continues travelling
A. due to gravity. B. in a curved path. C. due to a force acting on it. D. even if no force acts on it.
Multiple dialects of American English formed because of
A) isolation from one another after independence. B) different cultural influences on each group. C) the Atlantic Ocean. D) invasions, including by the Angles, Normans, and Saxons. E) differences in the dialects of the colonial settlers.
The roundness of the Earth's orbit is known as its ________.
A. variability B. rotational balance C. variation D. eccentricity