Reading Comprehension (RC) | Re: In the mid-1970’s, Walter Alvarez, a geologist, was studying Earth’s

1. It can be inferred from the passage that had the scaglia rossa not exhibited a certain geological property then which of the following would most likely have been true?

B.Scientists would have been unable to determine a shift in the Earth’s magnetic fields.

It had recently been learned that the orientation of the planet’s magnetic field reverses, so that every so often, in effect, south becomes north and vice versa. Alvarez and some colleagues had found that a certain formation of pinkish
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