Question: where can weathered parent material be found in soil

title: Parent material
text: Parent material transported by streams is called alluvium of which there are three main types . Floodplains are the parts of river valleys that are covered with water during floods . Due to their seasonal nature , floods create stratified layers in which larger particles tend to settle nearer the channel and smaller particles settle nearer the edges of the flooding area . Alluvial fans are sedimentary areas formed by narrow valley streams that suddenly drop to lowlands and widen dramatically . Sedimentary in these types of deposits tend to be larger closer to the uplands and finer near the edges of the fan . Delta deposits , the third of type of alluvium , are finer sediments that are discharged from streams into lakes and eventually settle near the mouth of the river .