Question

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A geologist studies a layered rock to determine its age. Bacteria fossils from the Precambrian Age are found in the rock's upper layers, but no fossils are found in the rock's bottom layers. Which of these conclusions about the rock is best supported by the evidence

1.The rock formed quickly through a series of rapid changes.

2. The bottom layers of the rock could have formed before life occurred.

Answer 1

2. The bottom layers of the rock could have formed before life occurred.

Step-by-step explanation:

The bottom layers of the rock could have formed before life occurred because there is no fossil is present. If there is life at that time so the fossils are present at the bottom layer so the absence indicates that is no life present at that time. The bottom layer is older than the upper layer so that's why fossils of bacteria are found in the upper layer of the rock.