A superburial is similar to a mass grave

Mass grave

A mass grave is a grave containing multiple number of human corpses, which may or may not be identified prior to burial. There is no strict definition of the minimum number of bodies required to constitute a mass grave, although the United Nations defines a mass grave as a burial site which...

, but is a term typically used by archaeologists to denote an area of dense burial activity without the negative connotation

Connotation

A connotation is a commonly understood subjective cultural or emotional association that some word or phrase carries, in addition to the word's or phrase's explicit or literal meaning, which is its denotation....

s often associated with mass graves. A superburial may also span a much longer time period than is typical for a mass grave, such as a cemetery

Cemetery

A cemetery is a place in which dead bodies and cremated remains are buried. The term "cemetery" implies that the land is specifically designated as a burying ground. Cemeteries in the Western world are where the final ceremonies of death are observed...

 in constant use for centuries.

List of superburials under current excavation (far from complete)

• Valley of the Kings
  Valley of the Kings
  The Valley of the Kings , less often called the Valley of the Gates of the Kings , is a valley in Egypt where, for a period of nearly 500 years from the 16th to 11th century BC, tombs were constructed for the Pharaohs and powerful nobles of the New Kingdom .The valley stands on the west bank of...
  
  
• Ban Non Wat
  Ban Non Wat
  Ban Non Wat is a village in central Thailand, in the Non Sung district, Nakhon Ratchasima Province, located near the small city of Phimai. It has been the subject of recent excavation of what are thought to be late neolithic and early bronze age burials...