1. Hot Spots

2. Volcanoes usually occur At plate boundaries: However…

3. volcanoes can occur in the middle of a Tectonic plate
Hot Spots are also known as Intraplate Volcanism
A Hot Spot is an area of volcanic activity that is far from a plate boundary
Most hot spots are located directly above columns of rising magma, called mantle plumes
The Hawaiian Islands and
Yellowstone are examples
More than 40 are known and have
lasted for millions of years

4. A chain of islands (with
different ages) is created
as the plate moves over the
mantle plume
The oldest island (Kauai)
does not have active
Volcanoes since it is no
longer over the plume
The youngest island is
directly above it

5. This island has been eroded so much that it is now below the ocean floor and would be called a seamount
Which direction is the pacific plate moving in?
How could you use this data to determine the speed of plate movement?