You can tell if a volcano's gonna erupt when you hear a low rumbling sound coming from the direction where the volcano is. The volcano will also start smoking (no, not a cigarette) about one hour beforehand. When it starts raining little balls of hot ash and billowing out pitch black smoke.... RUN!
Physical location in the surrounding geology & geomorphology (with allowances for continentral drift and erosion after deposition).#
Crystal structure: solidified lava crystals are generally very small thanks to rapid cooling.
The presence of vesicles (gas bubbles). (The walls of many of the old buildings in the City of Exeter were built from a mixture of Triassic conglomerate and a grey, highly-vesicular, fine-grained Hercynian-orogenic lava; both local rocks.)
Physical texture - is it homegenous or heavily inhomogenous, clastic, rubbly, etc?
Surface texture: Rubbly? Strongly-rippled (ropey) surfaces having solidified in air, with no confining rock to mould it?
If the underside is visible: inclusions of existing land surface material, but don't confuse with xenoliths in intrusive rocks.
Igneous rocks often contain grains that can be seen with the unaided eye.
Some igneous rocks have no visible grain and appear glassy
they show colored rains that are not in bands
There are different types of volcanic stones. For example: Granite, Felsite, Basalt, Feldspar, and Gabbro. This is a very helpful site: www.nativetech.org/stone/stonetypes/volcanic.html
When the ground starts to shake you here cracking and banging noises smoke comes out of the volcano and I you stand there to long you will be melted by the lava
you'll know when a volcano is erupting when. it starts shaking or when is starts getting hot
Volcanic ejecta are "foamy". They tend to have evidence of gas pockets. Also, rock which forms from slow cooling magma have larger crystals. Ejecta have crystals that are microscopic.
A volcano that no longer erupts is called an extinct volcano.
i don't know when this was but, it does not matter. the volcano in Hawaii erupts all the time
a silent volcano is when a volcano erupts but silently
I am fairly certain that when a volcano no longer erupts, it is now called a dormant volcano. I think that is all that it is called
tephra
Type your answer here... were do you go when a volcano erupts
i think: lava! i don't actually know.
yes because they know its coming
An Active Volcano.
A volcano that no longer erupts is called an extinct volcano.
i don't know when this was but, it does not matter. the volcano in Hawaii erupts all the time
If you mean 'how does lava release itself from the volcano', it erupts through the volcano's crater. But if you mean 'how does lava erupt from the volcano', then sorry, I have no answers to that.
a silent volcano is when a volcano erupts but silently
lava
If it erupts
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destruction