How Old are Glaciers?

Question

How old are glaciers? It can be any specific glacier on earth. please cite your sources also, thanks :)

Answer 1

Presently, 10% of land area is covered with glaciers.
Glaciers store about 75% of the world's freshwater.
Glacierized areas cover over 15,000,000 square kilometers.
Antarctic ice is over 4,200 meters thick in some areas.
In the United States, glaciers cover over 75,000 square kilometers, with most of the glaciers located in Alaska.
During the last Ice Age, glaciers covered 32% of the total land area.
If all land ice melted, sea level would rise approximately 70 meters worldwide.
Glacier ice crystals can grow to be as large as baseballs.
The land underneath parts of the West Antarctic Ice Sheet may be up to 2.5 kilometers below sea level, due to the weight of the ice.
North America's longest glacier is the Bering Glacier in Alaska, measuring 204 kilometers long.
Glacial ice often appears blue when it has become very dense. Years of compression gradually make the ice denser over time, forcing out the tiny air pockets between crystals. When glacier ice becomes extremely dense, the ice absorbs all other colors in the spectrum and reflects primarily blue, which is what we see. When glacier ice is white, that usually means that there are many tiny air bubbles still in the ice.
The Kutiah Glacier in Pakistan holds the record for the fastest glacial surge. In 1953, it raced more than 12 kilometers in three months, averaging about 112 meters per day.
In Washington state alone, glaciers provide 470 billion gallons of water each summer.
Antarctic ice shelves may calve icebergs that are over 80 kilometers long.
Almost 90% of an iceberg is below water--only about 10% shows above water.
The Antarctic ice sheet has been in existence for at least 40 million years.
From the 17th century to the late 19th century, the world experienced a "Little Ice Age," when temperatures were consistently cool enough for significant glacier advances.
See Also
NSIDC's Glacier Glossary: Search and browse terms related to glaciers in NSIDC's comprehensive cryospheric glossary.

Answer 2

How Old Are Glaciers

Answer 3

old