they are called dykes.
The motte is the the mound of earth the castle was built on.
Earth miterial
They were known for their agriculture, art and mound building of ceremonial and burial sites.
The Mound Builders built mounds of earth and stone
hill
which civilization built the great mound.
Because they built large mounds for ceremonial and burial use.
embankment is; a long mound of earth or store, sometimes built to raise a roadway.
A Motte is a man made mound of earth in which a Norman tower or a dungeon is built on.
Mound Builders
The Adena Mound
A tell or tel .