Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by location or context]
8. [single built works by location: topographical]
9. earthworks (engineering works)

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment
4. Built Complexes and Districts
5. complexes
6. complexes by function
7. industrial complexes
8. extracting complexes

Anotations

Scope note:

Ancient excavations consisting of a shaft sunk into chalk formations and at the bottom widening out horizontally into one or more chambers; found in Essex and Kent, England, and the valley of the Somme River, France; age and purpose are unknown.