(A) Sedimentary feature(s) that provide(s) detailed information about ancient streams choked with sediment is/are known as preserved

Question

Quizplus · Accepted Answer

Bars of gravel and sand are formed in streams when the flow slows down and sediment is deposited. The size and shape of these bars provide information about the velocity and direction of flow in the ancient stream, as well as the types of sediment being carried. Halite and gypsum deposits are formed from evaporated water in arid environments and do not provide information about stream flow. Petroleum and natural gas deposits are formed from organic matter that has been buried and transformed over millions of years and do not directly provide information about sedimentary features. Deposits of lakes and lagoons are formed in standing bodies of water and do not provide information about streams.

(A) Sedimentary Feature(s) That Provide(s) Detailed Information About Ancient Streams