Question

read the text. then answer the question.
waves deposited sand on a beach. over thousands of years, the sea level rose. the area with the beach became part of a coral reef. sediment containing the shells of marine organisms was deposited by waves on top of the older sediment.
which rock sequence is more likely to form from the sediment layers described above?
chart 1: younger (top) - limestone, older (bottom) - shale
chart 2: younger (top) - limestone, older (bottom) - sandstone

Explanation:

Step1: Identify rock types from sediments

Sand deposits form sandstone; shell-containing sediment forms limestone.

Step2: Determine layer order

Older sediment (sand) is below younger sediment (shells). So sandstone (older) is under limestone (younger).

Step3: Match to options

The second sequence has sandstone (older) at the bottom and limestone (younger) on top.

Answer:

The Lower Graph (sandstone below limestone)