The reddish-orange colour of weathering of volcanic ash is most likely due to its iron sulfide content which oxidizes to iron oxide so that limonite is yellow and hematite is red and in ash since it is such fine grained material it weathers more rapidly because it has a large surface area.
Answer:
Juan de Onate was the explorer who first visited the US river, the river is the Rio Grande. In 1598 he crossed the Rio Grande in El Paso. From there he sent out small parties in all directions to search for treasure that did not exist
Explanation:
Since 1848, the Rio Grande has marked the boundary between Mexico and the United States from the twin cities of El Paso, Texas, and Ciudad Juárez, Chihuahua, to the Gulf of Mexico.
