An alluvial deposit is an accumulation of a valuable ore, gemstones, or simply gravel or clay in the bed or former bed of a river. Valuable materials such as gold may be extracted using techniques of placer mining[?]. Gems historically were found in the gravels of India particularly diamonds and continue to be mined from alluvium in Myanmar and Sri Lanka. Glaciers may also deposit alluvium known as till.
... out of which 35.6% have children under the age of 18 living with them, 59.8% are married couples living together, 10.9% have a female householder with no husband ...