Volcano Flashcards
What is volcanism?
Process by which the maximise from the interior of that surface is known as volcanism
The inner temperature of the volcano is
6000°C
What is magma?
Magma is the molten form of rocks
What is lava?
When the magma is on the edge surface, that is above the crust layer
What is asthenosphere?
The weaker zone of the mantle is known as asthenosphere
What is crater?
The upper part of the volcano where the eruption happens and denunciations found
What is crater?
The upper part of the volcano where the eruption happens and denunciations found
Lonar Lake of Maharashtra is an example of
Crater lake
What is the largest crater lake in the world?
Lake Toba
What is divergent plate boundaries?
To tectonic plates, move apart from each other, so their least of premise leads to the melting of the magma, causing volcanism oceanic crust
What is convergent plate boundaries?
Continental and oceanic slide towards each other to form a subduction zone, so the oceanic plate submerged under the continental plate, forming a deep oceanic range of subducting plate, lowers the melting temperature of the whole mantle and creating magma
What is central volcanic types?
The lava comes out of the narrow pipe that causing an explosion during the action of the magma and the surface, thus forming mountains and islands
What is fissure volcano
In the lava comes from the surface and spread smoothly to a larger area, so they form landscape such as plateaus
The cooling of the lava firms
Igneous rocks.
In the lava cools externally, it is known as exclusive topography when the magma cools internally, then it is called intrusive topography .
What is discordant, intrusivetopography?
When the magma solidifies and disturbed the wrong structure, then it is called discordant intrusive topography
What is cordant intrusive topography
When the magma solidifies without disturbance is called cordont intrusive topography
When the igneous rocks forms at the surface
Volcanic rocks
When the igneous rocks cools at the crust
Plutonic rocks
What is batholiths
Batholiths are large igneous rock formations from when magma rises into the earth crust and cools without erupting onto the surface
What is sill
It is flat layer of igneous rocks that forms between the pre-existing layer of rocks
What is laccoliths
A dome shaped Igneous rock formation that created when magma forces its way between layers of sedimentary rocks
What is dyke
Dikes are made of igneous rock or sedimentary rocks. The heart semi substance that spruce from schools and eventually become solid and index are usually vertically in nature compare to that of which is sill is horizontal in nature.
What are the extrusive volcanic landforms?
Cinder cone, composite cones, lava plateau, caldera with a cinder cone, volcano rock
What is acidic lava?
It is a highly viscous with a high melting point due to the high presence of silica, which will flow slowly and seldom travel for before solidifying volcanic Contrato volcano, the rapid solidification of lava and loud explosion, throws volcanic bombs or pyroclastic
What is basic lava?
Hottest lava and also highly fluid. It is a dark coloured base, salt, rich in iron and magnesium, but poor in silica, not explosive and vent quickly high priority with a speed of 10 to 30 mph, then gently sloping with a wide diameter forms a flat and sheet
The frequency of active volcanoes
Highly active and get erupted frequently. The only active volcano of India is barren islands in Andaman Nicobar.
The frequency of dormant volcanoes
It is highly dormant in nature, but have the possible possibility of eruption. Example Mount Arara after Turkey.
What are extinct volcanoes?
These volcanoes were one’s active and now did, and it exhaust all the magma. Example the Deccan Plateau of India.
What is one of the recent extinct volcano of India?
Narcondam Andaman Islands
The country with the most volcanoes
USA
What is the name of the volcano which killed more than 30,000 people and creates a tsunami, and which also from as trends and complete isolation of sunlight
Mount krakota volcano 1883
