True False - F From the relative dating of three geologic...

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F From the relative dating of three geologic formations, it is impossible to tell which one is the oldest. Which of the following radioactive element is most useful for dating the disturbances in soils caused by earthquakes during the last 2000 years? a) Uranium 238 b) Uranium 235 c) Potassium 40 d) Rubidium 87 e) Carbon 14 T After 3 half lives, a radioactive isotope will have decayed to 12.5% of its original amount T The deposition of banded iron formations in the Archean provides evidence of early photosynthesis. T An eq occurs when slow tectonic deformation causes a fault to reach its breaking strength and slip suddenly occurs across the fault surface F Tensile fractures never occur in nature F Because metamorphism involves the transformation of preexisting rocks in the solid state, new minerals cant grow to form metamorphic rocks T A rock produced by metamorphism at high pressures and relatively low temperatures, such as a blueschist, would most likely have been formed in a subduction zone
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