Bradley K. Schurman
2017-07-15 20:04:09 UTC
The largest icebergs known have all broken off from ice shelves,
the survey said.
Ice shelves are permanent floating sheets of ice that connect to
a land mass, according to the National Snow and Ice Data Center.
(Thus, since they're floating, when the berg finally breaks off,
it won't add to sea-level rise).