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How are archipelagos formed?

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Archipelagos are usually volcanic, forming along island arcs produced by subduction zones (or hot spots). They formed by tectonic activities when a tectonic plate moves over a hot- spot. the lava gets pushed and when there is enough, it rises to the surface of the water. as it cools it forms a pile (an island). the volcanic activity then stops but the plate carries on moving. so when it starts again, a new island is formed.... There are other processes involved in their construction: erosion, deposition and land elevation.
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How does a archipelago form?

the most common way srchipelagos are formed is though volcanic activity combined with tectoic movement

What is an archipelago?

An archipelago is a group, chain or cluster of islands surrounded by a large body of water, usually the open sea.

What is archipelagos?

Archipelagos are the countries or states that consists of manyislands like Philippines and Indonesia.
In Alaska

What archipelago forms the long tail of Alaska?

The islands of the long chain that extends from the Alaska Peninsula are the Aleutian Islands , named for the native Aleut tribes that still inhabit the state.