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Does a composite volcano have an Aa type of lava?
A'a can occur at composite volcanoes, but block lava flows, which are far more viscous, are more common.
How did AA lava get its name?
Aa lava is a basaltic lava with a flow characterized by rough surfaces of clinker.
What features may occur when volcano lava cools at the surface?
When volcano lava cools at the surface, it may form different features such as lava rock formations like basalt columns, lava tubes, and aa or pahoehoe lava flows. These features depend on the cooling rate and composition of the lava.
What type of lava is thick stiff and does not flow easily?
Thick, stiff lava that does not flow easily is known as aa lava. Aa lava has a rough, blocky texture due to its high viscosity, making it difficult for the lava to flow smoothly. Aa lava typically moves in a jerky, slow manner and can form sharp, jagged edges as it solidifies.
What type of lava forms rough jagged edges?
A'a lava forms rough jagged edges as it cools and solidifies. It is characterized by its blocky and sharp texture, which can make it difficult to walk on. A'a lava flows tend to move slower compared to pahoehoe lava flows.
Why is it that pahoehoe and AA lava are more frequent in shield volcanoes than in composite volcanoes?
Shield volcanoes have low viscosity basaltic lava, which typically creates pahoehoe and AA lava flows due to their ability to flow easily. Composite volcanoes have higher viscosity lava, such as andesitic or dacitic, which tend to form thicker and blockier lava flows rather than pahoehoe and AA flows.
Does a composite volcano have an Aa type of lava?
A'a can occur at composite volcanoes, but block lava flows, which are far more viscous, are more common.
What kind of lava does composite volcanoes produce AA or pahoehoe?
Usually neither. A'a and pahoehoe lavas are both of mafic composition (rich in iron and magnesium, poor in silica) and form basalt when they cool. Composite volcanoes usually erupt material of intermediate to felsic composition (felsic is rich in alkalis, aluminum, and silica), with lavas cooling into rocks such as andesite, dacite, and rhyolite.
How did AA lava get its name?
Aa lava is a basaltic lava with a flow characterized by rough surfaces of clinker.
What kind of lava hardens to form chunks?
It is called aa
What features may occur when volcano lava cools at the surface?
When volcano lava cools at the surface, it may form different features such as lava rock formations like basalt columns, lava tubes, and aa or pahoehoe lava flows. These features depend on the cooling rate and composition of the lava.
What type of lava is thick stiff and does not flow easily?
Thick, stiff lava that does not flow easily is known as aa lava. Aa lava has a rough, blocky texture due to its high viscosity, making it difficult for the lava to flow smoothly. Aa lava typically moves in a jerky, slow manner and can form sharp, jagged edges as it solidifies.
What is the difference between pahoehoe and AA lava?
The difference between Pahoehoe lava and AA lava is that pahoehoe lava is smooth and AA lava is jagged.
What type of lava forms rough jagged edges?
A'a lava forms rough jagged edges as it cools and solidifies. It is characterized by its blocky and sharp texture, which can make it difficult to walk on. A'a lava flows tend to move slower compared to pahoehoe lava flows.
If a geologist finds AA rock while collecting in the field chances are high that the rock contains?
If a geologist finds AA rock, it is likely that the rock contains basaltic lava flows or volcanic material, as "AA" refers to a type of lava that has a rough, jagged surface. This texture forms when lava cools quickly and has a higher viscosity. AA lava is typically associated with shield volcanoes and can indicate past volcanic activity in the area.
How are blocky lava and aa lava similar?
Both blocky lava and aa lava are types of viscous, cooler lava flows that form rough, jagged surfaces. They are characterized by their slow movement and blocky appearance due to the solidifying of the lava flow before it fully cools.
What type of lava does a quiet eruption produce?
A quiet eruption typically produces basaltic lava. This type of lava is low in viscosity and flows easily, resulting in gentle, slow-moving lava flows. It often forms shield volcanoes with broad and gently sloping sides.
