Whose work first explained how sea levels change over geologic time?
Quick Answer
Harald Urey and other geochemists helped develop ideas about past climates and sea-level change, but geologists such as Walter Pitman and Bill Ryan later linked sea-level changes to tectonics. Their work in the 1970s and 1980s connected ocean-basin volume with global sea level.
The Full Story
Sea-level change is now understood through a combination of tectonics, climate, and ice volume. Geologists Walter Pitman and Bill Ryan helped popularize the idea that changes in seafloor spreading rates could alter ocean-basin volume and therefore sea level. Their work, along with broader Earth science research, helped explain why sea levels rise and fall over long periods. Today, sea-level history is studied with sediment records, fossils, and isotopes.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Sea level isn’t fixed—and geology explains why oceans rise and fall."