What lines of evidence support the hypothesized cause of the K-Pg mass extinction? Select all that apply.
| a. |
shocked quartz found near the event location |
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| b. |
tektites and microspherules found in the K-Pg boundary layer |
|
| c. |
None of the other answers fit. |
|
| d. |
evidence of glacial activity dated at 66 million years ago |
|
| e. |
the large Chicxulub crater located on the Yucatán peninsula dated at 66 million years old |
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| f. |
significantly increased iridium concentration in the K-Pg boundary layer |