What are the 4 different types of lava?
Because of the role of silica in determining viscosity and because many other properties of a lava (such as its temperature) are observed to correlate with silica content, silicate lavas are divided into four chemical types based on silica content: felsic, intermediate, mafic, and ultramafic.
What are the 3 main types of lava?
The high temperatures and pressure under Earth’s crust keep magma in its fluid state. There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition.
What type of lava does Kilauea have?
basalt
Kilauea is a basaltic shield volcano, erupting a type of basalt known as tholeiite. This type of lava is the dominant extrusive during the shield building (the main stage) of hawaiian volcanism and is the dominant basalt type erupted on Earth.
What are the two types of lava produced at Kilauea?
There are two different kinds of solidified lava you can encounter on the Big Island: pāhoehoe (pronounced ‘paw hoey hoey’) and ʻaʻā (pronounced ‘ah ah’).
What is thick lava called?
lava, magma (molten rock) emerging as a liquid onto Earth’s surface. Lava flowing toward the sea from Kilauea volcano, Hawaii, takes two recognizable forms: fast-flowing, ropy lava, called pahoehoe, and thick, blocky lava, called aa.
What is rhyolite lava?
Volcanic rock (or lava) that characteristically is light in color, contains 69 or more percent of silica, and is rich in potassium and sodium. Rhyolitic lavas are viscous and tend to form thick blocky lava flows or steep-sided piles of lava called lava domes. …
What type of volcano is Krakatoa?
stratovolcano
Mount Krakatoa is an example of a stratovolcano, a tall, conical volcano with multiple strata of solidified lava, tephra, as well as volcanic ash. These type of volcanoes typically have steep sides and usually erupt frequently & violently. Most of the popular eruptions have been made by stratovolcanoes.
What are the 2 main types of lava?
Lavas, particularly basaltic ones, come in two primary types: pahoehoe (pronounced ‘paw-hoey-hoey”) and aa (pronounced “ah-ah”). Both names, like a number of volcanological terms, are of Hawaiian origin. A third type, pillow lava, forms during submarine eruptions.
What is the difference between aa and pahoehoe flow?
Pahoehoe is lava that in solidified form is characterized by a smooth, billowy, or ropy surface, while aa is lava that has a rough, jagged, spiny, and generally clinkery surface. In thick aa flows, the rubbly surface of loose clinkers and blocks hides a massive, relatively dense interior.
What volcano has blocky lava?
Kilauea volcano
Lava flowing toward the sea from Kilauea volcano, Hawaii, takes two recognizable forms: fast-flowing, ropy lava, called pahoehoe, and thick, blocky lava, called aa.
What are the two types of volcanic sand?
Sand samples of volcanic origin are of two dominant types: clastic detritus eroded from a volcanic terrain and products of explosive volcanic eruptions (pyroclastic sediments, also known as tephra). The first group of volcanic sand is similar to most other types of sand in terms of genesis.
What kind of crust does basaltic lava have?
Subaerial basalt forms lava flows or pyroclastic fields and cones. Two main types of basaltic lava flows are aa lava and pahoehoe lava. Aa lava has rough rubbly irregular crust while pahoehoe is smooth. Lava crust of aa type is broken into pieces while pahoehoe retains its continuity.
What are the different types of lava flows?
1. Red hot basaltic lava flow. Hawaii. 2. Blocky lava. La Palma. 3. Slowly solidifying pahoehoe lava flow. Hawaii. 4. Pillow lava. Iceland. 5. Transition from smooth pahoehoe to rubbly aa. Hawaii. 6. Columnar lava. Northern Ireland.
What kind of lava is a volcanic bomb made of?
Volcanic bombs are mostly produced by Strombolian and Vulcanian eruptions. These eruption types usually produce basaltic lava. Hence, volcanic bombs commonly possess a basaltic or similar mafic composition.
