Snail Fossil
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Help with this particular question.. It's tossing me for any loop..?
A paleontologist thinking about Ordovician (450 million-year-old) snail fossils would definitely
look for them in ___(1)_______ to find out how old they are, she would use radiometric dating
techniques including __(2)____.
A. (1) sedimentary rocks (2) carbon-14 decay from igneous rocks
B. (1) igneous rocks (2) carbon-14 decay from sedimentary rocks
C. (1) igneous rocks (2) potassium-40 decay from igneous rocks
D. (1) sedimentary rocks (2) potassium-40 decay from igneous rocks
E. (1) sedimentary rocks (2) potassium-40 decay from sedimentary rocks
think it through:
You realize fossils are just present in sedimentary rock right?
B and C are out.
There is no igneous rock involved which means you can't date from this right?
A & D (2) are out.
See, you did not even need to pick the decay dating method.