“during ice ages, caused by wobbles in the earth’s orbit, sea levels dropped more than 400 feet as ice piled up on land.
“during ice ages, caused by wobbles in the earth’s orbit, sea levels dropped more than 400 feet as ice piled up on land.
ice age:172
during the last glacial period the sea-level has fluctuated 20–30 m as water was sequestered, primarily in the northern hemisphere ice sheets.