0
Tephra is the general term now used by volcanologists for airborne volcanic ejecta of any size. Historically, however, various terms have been used to describe ejecta of different sizes. Fragmental volcanic products between 0.1 to about 2.5 inches in diameter are called lapilli; material finer than 0.1 inch is called ash. Fragments larger than about 2.5 inches are called blocks if they were ejected in a solid state and volcanic bombs if ejected in semi-solid, or plastic, condition. In a major explosive eruption, most of the pyroclastic debris would consist of lapilli and ash. Volcanic bombs undergo widely varying degrees of aerodynamic shaping, depending on their fluidity, during the flight through the atmosphere. Based on their shapes after they hit the ground, bombs are variously described, in graphic terms, as "spindle or fusiform", "ribbon", "bread-crust", or "cow-dung".
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What happens when the sun heats ground water?
When the sun heats ground water it evaporates into the atmosphere, then it condensates back into droplets, and then falls as rain back into the ground. It is a never ending cycle and is quite unique.
What is it called when rain falls to the ground and flows into surface water and is six letters and begins with a r?
runoff
What do you call the particles produced in volcanic eruptions?
tephra, ash, cinders, bombs, blocks, etc. depending on size.
What is ground movement?
brunnett beauty: What is ground movement? I believe ground movement is the plates moving in the earth just like how earthquakes form by plates in the ground colide to make movement in the earth.
What kind of feature will it form if the the magma chamber empties beneath a composite volcano and then collapses?
It falls down
What volcanoes form from the fallen cinders and tephra of an eruption?
A combination volcano develops from repeated lava eruptions and the accompanying tephra deposits Tephra is the debris from the eruption..
Which volcanoes form from the fallen cinders and tephra of an eruption?
Cinder Cone
Which volcanoes form from fallen cinders and tephra of an eruption?
Cinder Cone
Is it true that condensation is any form of moisture that falls to the ground from a cloud?
No... that would be PRECIPITATION
Is dew a form of precipitaion?
No because precipitation falls from the sky and dew evaporates from the ground (I think)
What is the name of the largest sized tephra?
Blocks is the name used for the biggest pieces of tephra. Tephra is produced by a volcanic eruption.
Hail falls to the ground because of the force of?
When hail falls to the ground, it is because of the force of FRICTION!! :)
Where can tephra be found?
Tephra, the material ejected into the air during an explosive volcanic eruption, consists of molten lava materials such as pumice, cinders, and volcanic ash that have cooled and solidified as they fell through the air. Large tephra deposits form where the material lands and eventually become compacted into rock called volcanic tuff.
Why is tephra dangerous?
why is tephra dangerous: Tephra is usually dangerous because it can come in small sizes or bigger sizes it is made up of rock and smoke
What is any form of water such as rain snow sleet or hail that falls from the sky to the ground?
These forms given the general term precipitation.
What is the descridtion of tephra?
Tephra is basically ash, rock, cinders, and solidified lava spurted from a volcano.
Can a shield volcano summit tephra?
Tephra is stuff that comes out of the volcano, it is mainly disposed as rocks.
