The culture that built cities on mounds was the Chinese
The aztec built bridges and causways to get to certain areas without getting wet. Also the had built them to keep invaders away from the city Tenochtitlan. Lastly, they built it to get to the mainland. Not useful... b.tch cun.
Bund wall and dyke wall are two completely different walls, and used for certain use. Bund wall is a concrete or earth wall surrounding a storage tank containing crude oil or its refined product, and dyke wall is a long wall or embankment built to prevent flooding from the sea.
infinitive: build past: built past participle: built
They were built by the Romans. So in the roman time frame.
Just before West Harling was built.
they built dams to keep the flooding out of their cities
They are built on stilts to avoid flooding and in some cases, to be out of reach of wild animals.
there are approximately 3000 mounds
Mounds were built for ceremonial and burial purposes.
There is no definitive evidence to suggest that effigy mounds were intentionally built to represent constellations in the sky. Effigy mounds were primarily burial mounds constructed by indigenous peoples in North America. Their shapes often represented animals or other figures important to the culture that built them.
Researchers are uncertain as to why mounds were built in the shape of birds and snakes. Some theorize that this was because the people who built such mounds had great respect for these creatures.
The Cahokia Mounds are in Illinois. The Mississippian culture built the mounds sometime between 600–1400 AD.
Some mounds were constructed around important public structures, such as temples. A temple would be built, then after a generation, destroyed and covered with earth. Some mounds were created to house burials. Some, such as the Great Serpent Mound in Ohio, are astronomical observations and are aligned with equinoxes or solstices. Some are effigy mounds, that is they are sculpted into representational forms, such as a giant bird. Mounds can be sites of elite houses, council houses, and temples and would be protected from flooding from nearby rivers.
pray
For religious purposes
mounds
Not all mounds built by Native Americans contain human remains.