Marajoara – Mound Complex of Marajó Island, Pará (Hypothetical Urbanism)
Marajoara · Marajoara culture · Marajó mounds · Tesos of Marajó
Marajoara Phase (800–1400 CE) Amazonian Polychrome·Marajoara / Aruã / Ananatuba·🇧🇷 Pará, Marajó Island, Breves / Joanes, Brazil
About
About Marajoara – Mound Complex of Marajó Island, Pará (Hypothetical Urbanism)
Marajó Island (40,100 km² at Amazon mouth) preserves Marajoara Phase (800–1400 CE) tesos (mounds 90 m diam, 12 m high) with causeways (3 km at +1 m) controlling seasonal floods for raised-field agriculture that Europeans called 'Amazonian Venice' (hyped as continent-wide city 40,000 vs Roosevelt chiefdom 5,000–10,000). Betty Meggers 1950s hyped 10,000 km² empire; Anne Roosevelt 1990s 14C proved dense but not urban, no stone city. Tesos elite lived with polychrome urn burials; causeways managed 2 m seasonal flood for fish ponds.
Schaan 2004 geophysics traced 20 km causeway network at +1 m, not Atlantis streets. Included as Amazonian hypothetical urbanism contested; flagged contested/hypothetical.
Why it mattersPremier Amazonian teso mound causeway type site for debating Amazonian complexity: chiefdom vs empire.
Open questions
Mysteries & theories
Mysteries
- 01Whether causeways were defence or water management
- 02Whether tesos hierarchy reflects state or chiefdom
Theories
- 01Marajoara collapse c. 1400 due to Aruã invasion and flood regime shift
- 02Polychrome urn diffusion proves Marajoara not isolated Atlantis
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. 800 CE Marajoara Phase tesos mound causeway network
- Period
- Marajoara Phase (800–1400 CE) Amazonian Polychrome
- Culture
- Marajoara / Aruã / Ananatuba
- Builders
- Marajoara chiefdom earthmovers
- Purpose
- Seasonal flood water management for fish ponds and polychrome urn cemeteries
- Abandoned
- c. 1400 CE after floodplain shift
- Rediscovered
- 1950s Betty Meggers; Roosevelt 1980s
- Excavation
- Partially excavated
c. 800 CE
Marajoara Phase begins; tesos and causeways built
1000
Marajoara peak with 90 m tesos and 3 km causeways
1950
Meggers hypes empire 10,000 km²
1991
Roosevelt 14C proves chiefdom 10,000 not continental city
On the ground
Structures & features
0.9833° S · 49.5833° W · 5 m · 2 mapped features
Teso mound 90 m diam 12 m high
mound90 m diam 12 m high teso mound with polychrome urns
0.9820° S · 49.5840° WCauseway 3 km at +1 m
causeway3 km causeway 50 m wide at +1 m for flood management
0.9850° S · 49.5810° W
Gallery