A large detached piece of a glacier is called an iceberg. The process by which this happens is called calving.There isn't really a term for a detached piece of an iceberg. See related question.
It's called "calving"
iceberg
An Iceberg.
A glacier is a piece of ice.
iceberg
The floating mass of ice is known as an ice burg, the process of breaking free from the main glacier is called calving.
A glacier is older than an iceberg, because an iceberg is a piece of ice that fell off a glacier.
It is called a glacier.
The answer is "floe."flow in all direcions
malaspina glacier
A frozen river is called a frozen river. Rivers that normally flow as liquid water, are called frozen rivers when they become frozen.