This document presents information about volcanism. It discusses the causes of volcanism such as tectonic plate movements and changes in pressure. It describes the different parts of volcanoes like the magma chamber and vent. It outlines the various volcanic products including pyroclasts, lava types, and gaseous emissions. It also examines the different types of volcanoes based on their eruption patterns and styles. In conclusion, the document provides an overview of volcanism and its effects.
1. VOLCANISM
PRESENTED BY- PRIYARANJAN KAR
GUIDED BY – BIRANCHI NARAYAN
NATH SIR
ROLL NO – BS19- 243
DEPARTMENT OF GEOLOGY
KENDRAPARA AUTONOMOUS
COLLEGE
2. Content
Introduction
Causes of volcanism
Parts of volcanoes
Volcanic products
Types of volcanoes
Effects
Conclusion
References
3. Introduction
Volcanism is the process of
eruption of magma onto the
earth’s surface where volcanic
products ejected through a weak
zone or vent
VOLCANO
A mountain formed due to
volcanism
VOLCANISM
4. Causes of volcanism
Movements of tectonic plates
Change in pressure
Weak zone in the earth’s crust
Injection of a new batch of magma into an
already filled magma chamber
5. Parts of volcanoes
1. Magma chamber
2. Lava
3. Main vent
4. Secondary vent
5. Crater
6. Throat
7. Sill
8. Dike
6. Volcanic products
Solid products
The rock fragments ejected during volcanic eruption are
called pyroclasts
1. Volcanic Block 2. Volcanic bomb
