Alluvial Inca

Alluvium

Alluvium is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit. Alluvium is typically geologically young and is not consolidated into solid rock. Sediments deposited underwater, in seas, estuaries, lakes, or ponds, are not described as alluvium. Floodplain alluvium can be highly fertile, and supported some of the earliest human civilizations.

Inca Empire

The Inca Empire, officially known as the Realm of the Four Parts, was the largest empire in pre-Columbian America. The administrative, political, and military center of the empire was in the city of Cusco. The Inca civilisation rose from the Peruvian highlands sometime in the early 13th century. The Portuguese explorer Aleixo Garcia was the first European to reach the Inca Empire in 1524. Later, in 1532, the Spanish began the conquest of the Inca Empire, and by 1572 the last Inca state was fully conquered.

alluvial

Adjective

1. Pertaining to the soil deposited by a stream.

Noun

1. A deposition of sediment over a long period of time by a river; an alluvial layer.
2. Alluvial soil; specifically, in Australia, gold-bearing alluvial soil.

inca

Noun

1. Any of several species of hummingbirds in the genus Coeligena