How these dates were made
Why this bar's edges are floors, not a founding and a fall.
The atlas draws the world at 18 moments in time, not continuously. This bar runs from the first snapshot in which Shellfish gatherers appears to the last, so both edges are floors — the earliest and latest years it is attested, not a founding and a dissolution.
Elsewhere in Americas at the time
Records whose own span overlaps this one, found by the same test the canvas draws with. The bar under each card is where it sits inside this one.
Landmark · Americas
Chichen Itza
600 CE – still standingPolity · Americas
Chorrera
Attested 1500 BCE – 100 BCETrade route · Americas
Mesoamerican Trade Network
1200 BCE – 1521 CEConflict · Americas
Maya City-State Wars
400 BCE – 900 CELandmark · Americas
Tikal
600 BCE – still standingPolity · Americas
Monte Albán
Attested 323 BCE – 700 CETrade route · Americas
Polynesian Eastward Voyaging
700 CE – 1300 CEConflict · Americas
Monte Albán Zapotec Conquest State
200 BCE – 500 CEDated moments inside this span
Events the timeline places between 1500 BCE and 800 CE.
And in the rest of the world
Records running through the same years, on the other side of the map.
Image credits4 pictures from Wikimedia Commons
- Chichen ItzaDaniel Schwen · CC BY-SA 4.0
- Chorrera cultureNASA · Public domain
- TikalMundo Maya · CC BY-SA 4.0
- Monte Albánnsaum75 !Dígame¡ · CC BY-SA 3.0