The 1-Cm-Thick Clay Layer That Marks the Cretaceous/Paleogene (K/Pg)boundary Has

question 76

Multiple Choice

The 1-cm-thick clay layer that marks the Cretaceous/Paleogene (K/Pg) boundary has a high percentage of the element ________ in the clay layer,an enrichment about 300 times greater than the normal abundance.

• A) iridium
• B) silicon
• C) iron
• D) oxygen
• E) krypton

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Definitions:

Microculture

A subculture or small group within a larger society, characterized by specific cultural practices, beliefs, or interests.

Prospectus

A document giving details about a company and its business activities, used to inform potential investors.

Gender Roles

The set of societal norms dictating what types of behaviors are generally considered acceptable, appropriate, or desirable for people based on their actual or perceived sex.

Heterosexuals

Individuals who are sexually attracted to people of the opposite sex.