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Once upon a time in the land of Bikini Bottom, there 

was a rock named Rocky the Rock. However, Rocky 

the Rock was a rock of many identities...

Sometimes, Rocky the Rock was an igneous 

rock. Igneous rocks are formed from the 

cooling of magma, which is hot liquid rock 

found deep inside the earth. Also, igneous 

rocks can be formed inside the earth 

(intrusive igneous rock) or outside the earth 

(extrusive igneous rock) as a result of a 

volcanic eruption.

When Rocky the Rock was an igneous rock, 

ALL the lady rocks were infatuated with his 

looks, since igneous rocks are   very shiny and 

glasslike. 

After being an igneous rock, Rocky the 

Rock could become either sedimentary 

rock or metamorphic rock, or even melt 

back to magma and turn back into 

igneous once more. All of this is possible 

because of the Rock Cycle!

If Rocky the Rock wanted to turn into 

sedimentary rock, he must first be broken 

down into sediment (loose pieces of rock and 

mineral) through weathering and erosion, 

which occurs through rain and wind over a 

long period of time.

After enough sediment is piled and 

compacted together, Rocky the Rock is 

officially a sedimentary rock! 

Since the process takes an awfully long 

time, fossils can sometimes be formed 

within the sedimentary rock if the 

material slips in during the piling and 

compacting of sediment! Cool stuff 

right?!

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