Beringia – Drowned Land Bridge
Beringia · Bering Land Bridge · Bering Isthmus
Pleistocene (exposed 36k–11k; fully closed 21k–14k cal BP brown/green zones)·Paleolithic Siberian / Paleo-American / Dyuktai / Clovis ancestors·🇺🇸 Bering Strait, between Siberia (Chukotka) and Alaska (Seward Peninsula), United States
About
About Beringia – Drowned Land Bridge
1,000 km wide steppe isthmus connecting Asia and America exposed 36k–11k BCE during Last Glacial lowstands (–120 m), now 53 m under Bering Strait. Contrary to classic arid 'bridge' trope, 2023 USGS sediment cores revealed not grassy steppe but shrubby tundra–wetland mosaic with woody patches and freshwater lakes in central now-submerged lowlands – altering migration models. Human foot-traffic 16k–13k BCE left genetics but little architecture; Paleo-American, Dyuktai, Clovis corridor debate. Beringia was refugium for mammoth steppe, not merely corridor.
Why it mattersCanonical land bridge for peopling of the Americas; Beringia refugium concept core to Paleo-Indian, now reshaped by paleoecology reinterpretation.
Open questions
Mysteries & theories
Mysteries
- 01Wasteland vs refugium – did humans winter on bridge or transit quickly?
- 02Standstill hypothesis genetic isolation 20k on bridge?
Theories
- 01Submerged shrub tundra model (Elias et al. USGS) vs prior arid steppe – implies slower migration and lake resources
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- Natural – human seasonal hunting camps only (no cities)
- Period
- Pleistocene (exposed 36k–11k; fully closed 21k–14k cal BP brown/green zones)
- Culture
- Paleolithic Siberian / Paleo-American / Dyuktai / Clovis ancestors
- Purpose
- Biotic interchange – mammals, then humans to Americas
- Abandoned
- Flooded by Meltwater Pulse post-LGM; sea levels near modern by 11k cal BP (USGS dated)
- Rediscovered
- 1937 E. Hultén naming 'Beringia'; 2019 Yukon GS paleodrainage map; 2023 USGS core campaign
- Excavation
- Not applicable
36k–21k BCE
First exposure phase pre-LGM (Manley/Dyke)
21k–14k
Maximal brown-zone exposure (21 ka) and green retreat (14 ka)
11k cal BP
Post-glacial flooding dated by USGS geophysics (Straub et al.)
2023
USGS 31 cores show shrub tundra not arid steppe in central bridge
On the ground
Structures & features
65.8000° N · 168.5000° W · -53 m · 4 mapped features
Bering Strait center (Diomedes)
straitNarrowest point 85 km, now 53 m water, islands are former highlands
65.7700° N · 169.0000° WUSGS Core Sites Central Bridge (2023)
core field31 new sediment core sites revealing shrub tundra paleo-lakes
65.5000° N · 168.8000° WBluefish Cave (?) Yukon entry corridor
caveContested early human occupation 24k on eastern Beringia margin (not submerged)
67.0000° N · 140.5000° WYukon Beringia Interpretive Centre (museum proxy)
museumPaleodrainage map public exhibit
60.7210° N · 135.0550° W
Gallery