each diagram below shows a set of rock layers in the fossil record. a thin, black layer represents an area…

each diagram below shows a set of rock layers in the fossil record. a thin, black layer represents an area high in iridium from volcanic ash, indicating a time of extreme volcanic activity on earth’s surface. which of the following diagrams shows evidence of a mass extinction event caused by extreme volcanic activity on earth’s surface? choose 1 answer:

each diagram below shows a set of rock layers in the fossil record. a thin, black layer represents an area high in iridium from volcanic ash, indicating a time of extreme volcanic activity on earth’s surface. which of the following diagrams shows evidence of a mass extinction event caused by extreme volcanic activity on earth’s surface? choose 1 answer:

Answer

Brief Explanations:

A mass - extinction event caused by extreme volcanic activity would result in a sudden disappearance of fossils above the iridium - rich layer (indicating the time of volcanic activity). In option C, there are fossils in the deeper layer below the black (iridium - rich) layer, but no fossils in the shallower layer above it, suggesting a mass extinction event occurred at the time of the volcanic activity.

Answer:

C.