Question

question 8 (1 point)
listen
the sedimentary layer of rock rich in iridium and is 65.5 million years old and thickest in the yucatan peninsula is called the _______.
extinction zone
jurassic layer
k-t boundary layer
iridium layer

Explanation:

The K - T Boundary Layer (now often referred to as the K - Pg Boundary Layer) is a sedimentary layer that is rich in iridium. Iridium is rare on Earth's surface but more common in asteroids. This layer is dated to approximately 65.5 million years ago, which coincides with the mass extinction event that led to the demise of non - avian dinosaurs. The Yucatan Peninsula is near the Chicxulub crater, which is thought to be the impact site of the asteroid that caused this extinction event, and the layer is thickest in this region as it is close to the impact site.
The Extinction Zone is a more general and less specific term. The Jurassic Layer would be much older (Jurassic period was about 201.3 - 145 million years ago). While the layer is rich in iridium, it is specifically known as the K - T (now K - Pg) Boundary Layer rather than just the Iridium Layer.

Answer:

C. K - T Boundary Layer