📖 what
What is isostasy?
GeologyGeophysics
Quick Answer
Isostasy is the balance of Earth's crust floating on the mantle beneath it. Heavier or thicker crust sinks deeper, while lighter crust rides higher.
The Full Story
The idea of isostasy helps explain why mountain belts stand high and why areas once covered by ice can slowly rebound after the ice melts. It is not a rigid float, but a dynamic equilibrium over geological time. The concept was developed in the 19th century from gravity and surveying observations. Isostatic rebound in places like Scandinavia and Canada continues today after the last Ice Age.
Key Facts
1.crust balances on the mantle
2.explains post-glacial rebound
3.developed in the 19th century
YouTube Angle
Suggested video title for this topic:
"Why continents float and mountains stay high"