The gulf stream is a surface current in the atlantic ocean that flows northward from the caribbean sea and the gulf of mexico it feeds another current that reaches northern europe which of these events would cause the greatest changes to the path and strength of the gulf stream?

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this