Grime's Graves — Thetford, Norfolk
Grime's Graves flint mines · TL818898
Late Neolithic to Early Bronze Age (c.3000–1900 BCE)·British Late Neolithic (Grooved Ware / Beaker)·🇬🇧 England, Norfolk, Breckland, Thetford Forest, Lynford/Weeting-with-Broomhill, United Kingdom
About
About Grime's Graves — Thetford, Norfolk
Grime's Graves (c.3000–1900 BCE, peak c.2600 BCE) is a 36-hectare Neolithic flint-mining pockfield in Breckland heath near Brandon, with 433 shaft pits visible as dimples and one deep public pit 9.5 m to the floor-stone black flint gallery, accessible by ladder. Excavated by Greenwell 1870 and Mercer–Longworth 1970s, shafts were dug through chalk to 12-m galleries following the high-quality Brandon black flint seam, producing polished axe blanks traded nationwide. Antler picks radiocarbon the earliest deep shafts to 2600 BCE, demonstrating organized industrial labour before metal.
Why it mattersLargest Neolithic flint mine in Europe; industrial archaeology type-site for antler-dated shafts.
Open questions
Mysteries & theories
Mysteries
- 01Why pit-field not gallery for centuries after 3000 BCE?
Theories
- 01Control of strategic black flint by Breckland tribal elite; axe currency
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c.3000 BCE early pits; c.2600 deep shafts
- Period
- Late Neolithic to Early Bronze Age (c.3000–1900 BCE)
- Culture
- British Late Neolithic (Grooved Ware / Beaker)
- Builders
- British Late Neolithic
- Purpose
- Industrial black flint mine for axe production and trade
- Excavation
- Partially excavated
c.3000 BCE
Shallow pit mining begins on Breckland chalk
c.2600 BCE
Deep shaft-and-gallery technique for black flint; antler picks
1870
W. Greenwell excavates first pits
1971–77
R. Mercer stratigraphic; public pit opened English Heritage
On the ground
Structures & features
52.4759° N · 0.6754° E · 30 m · 2 mapped features
- Grime's Graves Pit 1 — Public Shaftmine9.5-m shaft with 12-m radiating galleries of in-situ black flint seam, antler pick floor, ladder access52.4759° N · 0.6755° E
- Grime's Graves Pockfield — Pit Fieldfield433 dimpled pits over 36 ha heath marking surface of shaft heaps, visible aerially52.4757° N · 0.6752° E
Gallery