Question

read the text. then answer the question. mud was deposited at the bottom of a deep ocean. over time, the sea level began to drop, and the area became a shallow part of the ocean. a coral reef formed on top of the older sediment. sediment made mostly of the shells of marine organisms was deposited. as the sea level continued to fall, the area became part of a beach, and sand was deposited. when the sea level fell even further, the area became part of a valley. sand and pebbles were deposited by a fast - flowing river. a rock sequence formed from the sediment layers described above. put the following rocks in order to show what this rock sequence probably looked like. younger limestone conglomerate shale sandstone older

Explanation:

Step1: Analyze each rock formation

• Shale: Formed from mud deposited at the bottom of a deep ocean (oldest as it's the first - deposited sediment).
• Limestone: Formed from sediment made mostly of the shells of marine organisms (after the area became a shallow ocean part).
• Sandstone: Deposited when the area became a beach (after the sea - level drop for the beach formation).
• Conglomerate: Deposited by a fast - flowing river in the valley (youngest as it's the last - deposited according to the text).

Answer:

From oldest to youngest: shale, limestone, sandstone, conglomerate.