In a joint paper (1835) , British geologists Adam Sedgwick and Roderick Murchison named the __________ systems, based principally upon studies in Wales.
A) Precambrian and Cambrian
B) Cambrian and Devonian
C) Cambrian and Silurian
D) Precambrian and Silurian
Correct Answer:
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Q11: In 1879, _ proposed that a system
Q12: A _ displays a vertical sequence of
Q13: A _ is a polarity time-rock unit.
A)
Q14: Potassium-argon and argon-argon dating techniques are used
Q15: Select the description below that is NOT
Q17: In 1839, the Silurian System was defined
Q18: _ was the first to conclude that
Q19: A regression might result in a sandy
Q20: Among those listed below, _ is the
Q21: In a typical cross- section showing facies
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