Thursday, March 13, 2008

Lapilli Vs. Volcanic Ash

While exploring a dormant volcano I noticed a pattern in the size of the pebbles. Lapilli, also known as “little stone,” had a consistency of being closer to the volcano. The size of lapilli is about 2mm to 64mm.When further away the pebbles get smaller and smaller until you have volcanic ash, which is considered anything smaller than 2mm. A volcanic bomb is really close to the volcano. These are anything bigger than 64mm. If you were taking notes those would be the observations you see and lapilli would come later.
There are many ways you can tell if you are near a crater, one way I will explain is looking at the size of the pebbles. When there is an eruption, debris emits from the volcano. Debris such as magma comes out and it hardens in the sky. When little pieces harden they travel further than the heavier pieces. The volcanic ash, which is smaller than 2mm in diameter, travels further than the volcanic bombs and lapilli, which are bigger in diameter. So if you’re walking toward a volcano and your taking notes you will notice that in the beginning the rocks are smaller and called volcanic ash. Scientists say that volcanic ash can travel for miles. If there is to much it can block the suns rays and cause global cooling and ice ages. Volcanic ash makes up most of the pyroclastic material you see in the volcanoes. As you walk they will get bigger and turn to lapilli. As you get really close to the crater there will then be volcanic bombs on the ground. This is how you know how close you are to a volcano that may have once erupted.
There are many ways you can tell if you are near a volcano. I have described one of the most common ways to tell. First it will start as volcanic ash when you are far away. Then, it will turn into larger material called lapilli. When you get really close the biggest of volcanic rocks, volcanic bombs, are what you will see. This is how you can tell if you are walking towards the center of a volcano, or going away. JL5

9 comments:

Anonymous said...

that is a very well written blog , you covered a lot of ground in a short paper.

Anonymous said...

good job, you had a lot of good information!
-JZ1

Anonymous said...

Good job. It's well written and you had a lot of great info.

NV2

Anonymous said...

I thought it was cool that you started out pretending to be exploring a volcano. I learned something new, so you must have done a good job!
(Do you know what a 'rakstv' is? Does this thing really think I'm some sort of internet stalker?!)
~RN4

Anonymous said...

You did well young grasshopper. you seem wise in your ways of writing a seemingly intelligent paper. You also seem to be very knowledgeable with this subject. Exquisite examples!

tb5

student08 said...
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student08 said...
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Anonymous said...

you are my hero. you define Genious! I did not live, until i red your paper. i now know the definition of life. NR5

student08 said...

very good job !
you used good info and made it interesting to read .
best one i have read yet :)

LK5