Deep time · Cryosphere20 ka BPPaleoMIST 1.0 · grounded-ice model

Grounded iceLoadingMaximum thickness—

Ice age

Try it — drag the ice age back and forth

Ice marginThicker iceModel edge

PaleoMIST 1.0 · grounded-ice modelMargins, thickness, chronology and regional retreat remain model-dependent; the soft edge is an uncertainty cue, not a confidence interval.

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Flagship 001 / Origins of the City

Mesopotamia: A City Made Possible

From an Ice Age gulf to Uruk's networks of water, clay and distance

Editorial prototype · local fixture · uncertainties shown

Current position20 ka BP

Narrative dossier01 / 11

Deep history / global context

When the Sea Was Farther Away

Persian Gulf basin in a lower-sea-level world

A global ice model makes the first connection visible: water held on land lowered seas far beyond the ice margins.

PaleoMIST supplies a modelled grounded-ice thickness field. The distant Persian Gulf shelf was exposed at this time, but this view does not claim a surveyed local shoreline.

What the evidence saysStrongly supported

The grounded-ice field is a published model. Its relationship to global sea level is strong, while local shorelines require regional reconstruction.

Modelled ice thickness geometryPublished grid states with a soft display edge; not a surveyed margin.

4 linked sources · 2 atomic claims

Historical readingPublished ice model · global connection

Clock20,000 years BP

Time navigator20 ka BP—2350 BCE

Narration lanevisual preview · narration pending