The iridium anomaly layer marks the end of the dinosaurs in the fossil record. This layer, associated with the Chicxulub impact event, is found in various locations around the world and is indicative of the mass extinction event that occurred approximately 66 million years ago, leading to the demise of the non-avian dinosaurs.
What marks the end of the dinosaurs in the fossil record?
The rise of flowering plants
A sudden increase in sea levels
The appearance of mammals
The iridium anomaly layer
Pick one
11 answers
PICK ONE
The iridium anomaly layer.
What event is believed to have contributed to the mass extinction of the dinosaurs 66 million years ago?
An asteroid collision
Climate change
A volcanic eruption
A meteor shower
Pick one
An asteroid collision
Climate change
A volcanic eruption
A meteor shower
Pick one
An asteroid collision.
What is defined as the death of every member of a species?
Extirpation
B)
Depletion
C Reduction
D
Extinction
Pick one
Extirpation
B)
Depletion
C Reduction
D
Extinction
Pick one
D) Extinction.
Why is the Chiculub crater significant?
It is located in the middle of a desert
It is the largest volcano on Earth
C It is believed to be the impact site of the asteroid that caused the dinosaur extinction
D
It contains the oldest fossils known
Pick one
It is located in the middle of a desert
It is the largest volcano on Earth
C It is believed to be the impact site of the asteroid that caused the dinosaur extinction
D
It contains the oldest fossils known
Pick one
C) It is believed to be the impact site of the asteroid that caused the dinosaur extinction.
What is the iridium anomaly?
A type of meteorite
An unusually high concentration of iridium in a clay layer
A volcanic ash layer
A type of dinosaur fossil
Pick one
A type of meteorite
An unusually high concentration of iridium in a clay layer
A volcanic ash layer
A type of dinosaur fossil
Pick one
An unusually high concentration of iridium in a clay layer.