If you were studying the sediments along the beach and narrow continental shelf here,how could you tell that the river once flowed from the volcanoes straight out to the coast,instead of flowing somewhere inland as it does now?
A) Look for mineral and rock clasts of volcanic origin in the newest sediments of the beach and continental shelf
B) Look for volcanic ash
C) Look for mineral and rock clasts of volcanic origin in the older sediments of the beach and continental shelf
D) Both a and b are correct.

Question

If you were studying the sediments along the beach and narrow continental shelf here,how could you tell that the river once flowed from the volcanoes straight out to the coast,instead of flowing somewhere inland as it does now? 
A) Look for mineral and rock clasts of volcanic origin in the newest sediments of the beach and continental shelf 
B) Look for volcanic ash 
C) Look for mineral and rock clasts of volcanic origin in the older sediments of the beach and continental shelf 
D) Both a and b are correct.

Quizplus · Accepted Answer

To determine if the river once flowed from the volcanoes straight out to the coast, we need to look for evidence of volcanic origin minerals and rocks in the sediments. Option A and B may not necessarily indicate the direction of the river flow. However, if we find mineral and rock clasts of volcanic origin in the older sediments of the beach and continental shelf, it would indicate that the river once flowed straight out to the coast from the volcanoes. This is because the volcanic rocks would have been eroded and transported by the river to the coast, and then deposited as sediments over time.

If You Were Studying the Sediments Along the Beach and Narrow