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A long crack from which lava flows is called a?
A long crack from which lava flows is called a fissure.
How do lava tubes form and what role do they play in the formation of volcanic landscapes?
Lava tubes form when flowing lava cools and solidifies on the surface while the molten lava continues to flow beneath, creating a tunnel-like structure. These tubes play a significant role in the formation of volcanic landscapes by allowing lava to travel long distances underground, preserving heat and fluidity, and eventually emerging as surface flows, shaping the terrain with their unique structures and patterns.
What is formed when molten material is extruded fairly evenly over a long period of time from many fissures?
A volcanic plateau is formed when molten material is extruded fairly evenly over a long period of time from many fissures. This process creates a flat and wide landform composed of layers of solidified lava flows.
What is a pahoehoe flow?
Pahoehoe lava is a lava type flowing from volcanic eruptions. It is not to be confused with Aa lava. Pahoehoe is smooth and ropy lava, cooling into a ropy texture. Aa, on the other hand, is stony and rough. On another note (take this as you will): I would rather stand on Aa lava because it is cooler, characterised simply by its viscosity. Pahoehoe is at around 1100-12000C, as opposed to 1000-1100 for Aa. Please do not stand in either.
Why does lava take a long time to cool down?
Lava takes a long time to cool down because it has very high temperatures, sometimes exceeding 1,000 degrees Celsius. The large difference in temperature between the lava and its surroundings means heat transfer happens slowly. Additionally, lava is a poor conductor of heat, further contributing to the slow cooling process.
A long crack from which lava flows is called a?
A long crack from which lava flows is called a fissure.
What is the lava called from a crack in earth?
The lava that flows from a crack in the Earth's surface is called fissure or fissure lava. It typically arises from volcanic eruptions along long cracks in the ground, known as fissures, rather than a central volcanic vent.
Does lava flow from a shield volcano?
Yes, lava can flow from a shield volcano. Shield volcanoes are typically characterized by low-viscosity lava that flows easily over long distances, creating broad, gentle slopes. The lava flows from shield volcanoes are generally not explosive and occur as a result of the slow accumulation and drainage of magma.
How long can magma flow until cooling?
Magma flows for a long period of time but named lava when out of the ground. It depends how fast the lava is travels, but you can usually run from it:)
What forms when magma is released through long open cracks?
When magma is released through long open cracks, it forms a type of volcanic feature called fissures. Fissures allow magma to reach the Earth's surface without creating a single volcanic vent, often resulting in extensive lava flows.
Which type of lava is fluid and flows freely from volcanoes?
Basaltic lava is fluid and flows freely from volcanoes due to its low viscosity. This type of lava typically results in gentle, non-explosive eruptions and can travel long distances from the vent.
A high discharge rate of lava from a volcano will result in the formation of?
A high discharge rate of lava from a volcano will likely result in the formation of fast-flowing lava flows that can travel long distances before cooling and solidifying. This can create extensive lava fields and eventually build up the volcano's cone through repeated eruptions.
What types of lava come from the San Cristobal volcano?
The San Cristobal volcano in Nicaragua primarily produces basaltic lava, which is low in silica content and flows easily. This type of lava typically results in effusive eruptions with lava flows that can travel long distances from the volcano. The lava from the San Cristobal volcano tends to be relatively fluid and forms shield volcanoes.
Long trenchlike valleys running through the bedrock of lunar maria are called?
Rilles. Rilles are long, narrow depressions on the Moon's surface, often found in lunar maria. They can be several kilometers wide and hundreds of kilometers long, thought to have been formed by ancient lava flows or collapsing lava tubes.
What type of lava erupts from Mount Etna and how does this effect the eruptions?
Mount Etna typically erupts with basaltic lava, which is low in viscosity and flows more easily compared to other types of lava. This can result in effusive eruptions with lava fountains and lava flows traveling long distances. The low viscosity of basaltic lava allows gases to escape more easily, reducing the risk of explosive eruptions.
What is a fissure in the earth's crust through which molten lava and gasses escape?
A fissure is a crack or fracture in the Earth's crust through which molten lava, gases, and volcanic material can escape during an eruption. These fissures are often associated with volcanic activity and can vary in size from small cracks to long, linear features.
What is the river that flows through the state of Alaska?
The Yukon River is river that flows through Alaska. The 1,980 mile long Yukon River starts in British Columbia, flows through the Yukon Territory and then flows through Alaska.
