Question

Walter and Luis Alvarez hypothesized that an asteroid impact caused the formation of a 66- million-year-old layer of clay containing high levels of iridium. How did geologists test this hypothesis? What evidence did they look for? PLEASE HELP ME FAST!!!

Answer 1

Answer:

The Alvarez hypothesis posits that the mass extinction of the dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth. Prior to 2013, it was commonly cited as having happened about 65 million years ago, but Renne and colleagues (2013) gave an updated value of 66 million years.[1] Evidence indicates that the asteroid fell in the Yucatán Peninsula, at Chicxulub, Mexico. The hypothesis is named after the father-and-son team of scientists Luis and Walter Alvarez, who first suggested it in 1980. Shortly afterwards, and independently, the same was suggested by Dutch paleontologist Jan Smit

Explanation:

it was on wiki

Answer 2

Answer:

To test this hypothesis, geologists around the globe measured iridium concentrations at sites known to be 66 million years old. Because geologists knew that asteroid impacts cause minerals to fracture, they also measured the clay layers for shock-fractured minerals, like quartz.

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