Sea levels during the last ice age

Sea levels during the last ice age

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Credit: NOAA/SCIENCE PHOTO LIBRARY

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Caption: Earth's topography during the last ice age, around 18,000 years ago, when sea levels were some 110 metres lower. Elevation is colour-coded: dark blue is the deepest sea, pale blue is shallower. On land, green is lowlands, with yellow and then brown at higher altitudes. Sea levels were lower as much of the water on Earth was frozen at high latitudes due to lower average temperatures. The British Isles were connected to mainland Europe at this time, which allowed people to walk across the land bridge to populate the region. A land bridge also existed between Alaska, USA (far left) and Siberia, Russia (far right), which allowed people from Asia to become the first human inhabitants of North America. Much of South-East Asia was also linked in this way.

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Keywords: 18000 years ago, bering, bridges, climatological, climatology, cold, continent, cylindrical, earth, earth science, geographical, geography, geological, geology, glaciology, ice age, land bridge, last, levels, low, lowered, map, palaeogeography, palaeogeology, prehistoric, prehistory, sea level, topographical, topography

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