xv«
V \4 ^
41
R<xks have b*en uted by humaris for hundreds o/ yearj /or
and as
| Most oj the ocean Jłoor I is madę oj basalt. which f is aa igneous rock!
This is due to the high number oj underwater votcanoes that arc activc.
mm
ire also madę dijfcreat mparcd to ,*lly thcy are
m iron.
The word igneous comes Jrom the Latin word 'ignls* which means