Do Not copy. just take it as an example

1. Geothermal Energy

2. What is Geothermal Energy?
• Geothermal energy is a renewable energy
that makes use of the heat inside the
Earth.
• Earth’s Geothermal Energy generates
from the original formation of planet and
from the radioactive decay of minerals.

3. What are Hotspots?
• These are the volcanic regions thought to be fed by the
underlying mantle E.g. Hawaiian island
• Their position on the Earth’s surface is independent of
tectonic plate boundary.

4. Characteristic features of hotspots
• In ocean basins, hotspots form topographic highs of 500-1200 m with typical widths of
1000-1500 km. These highs are probably indirect manifestations of ascending mantle
plumes.
• Many hotspots are capped by active or recently active volcanoes. Examples are Hawaii and
Yellowstone Park in the western United States.
• Most oceanic hotspots are characterized by gravity highs reflecting the rise of more dense
material from the mantle. Some, however, have gravity lows.
• One or two aseismic ridges of mostly extinct volcanic chains lead away from many oceanic
hotspots.
• Most hotspots have high heat flow , probably reflecting a mantle plume at depth

5. Hotspot Track
• In continental areas, the age of magmatism and deformation may increase with distance from a
hotspot. These features are known as hotspot tracks.
• Chains of seamounts and volcanic islands are common in the pacific basin, and include such well-
known island chains as Hawaiian
• Emperor Line, Society and Austral islands, all of which are subparallel to either the Emperor or
Hawaiian chains and approximately perpendicular to the axis of East Pacific Rise.
• The life span of hotspots vary and depend on such parameters as plume size and tectonic environment
into which plume is emplaced.
• In the pacific ocean, three volcanic chains were generated by hotspots between 70 and 25 May, whereas
twelve chains have been generated in the last 25 May

9. • Somewhere between 40 and 150 active hotspots
have been described on the Earth.
• The best documented hotspots have rather a
irregular distribution occurring in both oceanic
and continental areas.
• Some occur on or near the ocean ridges, such as
Iceland. St.Halena and Tristan in the Atlantic
basin while others occur near the centers of
plates such as, such as Hawaii.

10. The End
X-A
Roll no. 31