VOLCANOES AND ITS PARTS AND FUNCTIONS.pptx

talks about the volcano and its parts

1. VOLCANOES VISCOSITY AND TYPES OF VOLCANIC ERUPTION

2. WHAT ARE THE FACTORS AFFECT VOLCANO? Magmas temperature Chemical composition Amount of dissolved gases This can affects magma’s VISCOSITY

3. What is a VISCOSITY? Is a property of the material’s resistance to flow This was based on liquid’s stickiness and thickness Meaning OPPOSITION TO FLOW

4. TEMPERATURE . The sticky the liquid the more it has resistance to flow

5. CHEMICAL COMPOSITION . If the magma contains high concentration of silica the higher the viscosity it will be

6. AMOUNT OF GAS . The higher the concentration of gas the lower the viscosity

7. DETERMINE IF THE PICTURE IS HIGH OR LOW IN VISCOSITY

8. DETERMINE IF THE PICTURE IS HIGH OR LOW IN VISCOSITY

9. FACTORS AFFECTING THE VOLCANIC ERUPTION Magma chemistry and content Temperature Viscosity Volume How much water and gas it contains Presence of groundwater Plumbing of the volcano

10. TYPES OF VOLCANIC ERUPTION PHREATIC ERUPTION - Is a stream driven eruption as the hot rocks come in contact with water.

11. TYPES OF VOLCANIC ERUPTION Is a violent eruption due to the contact between water and magma. As a result, a large column of very fine ash and high speed and sideway emission of pycrolastics called base surges are observed. PHREATOMAGMATIC

12. TYPES OF VOLCANIC ERUPTION STROMBOLIAN . A periodic weak to violent eruption characterized by fountain lava

13. TYPES OF VOLCANIC ERUPTION VULCANIAN - Characterized by tall eruption columns that reach up to 20 km high

14. TYPES OF VOLCANIC ERUPTION PLINIAN -Excessively explosive type of eruption of gas and pyroclastics , just like our Mount Pinatubo in Zambales