Question

the text below describes how an areas environment changed over time. read the text, then answer the question. a fast - flowing river deposited heavy sediment grains along its banks. light sediment such as mud was carried away by the strong water current. sediment deposited by a fast - flowing river over thousands of years, the river dried up, and the area became a desert. in the desert, sediment was deposited by wind. sediment deposited in a desert complete the sentences. the sediment deposited in these environments was pressed together to form rock. the rock has two layers: ____ layer made of conglomerate and ____ layer made of sandstone. an older... a younger a younger... an older

Explanation:

Conglomerate is formed from larger, heavier sediment (like the heavy sediment grains deposited by the fast - flowing river). Sandstone is formed from smaller, lighter sediment (like the sediment deposited by wind in the desert). The river environment existed first (as it was the initial environment described), so the conglomerate layer (from the river sediment) is older. The desert environment (and thus the sandstone layer from desert sediment) came later, so it is younger.

Answer:

an older... a younger