Answer:
small land in water.
I run cold and hot, I look blue but am red. What am I?
I am a rock group with four members all of whom died in plane crashes. Who am I?
You use a knife to slice my head and weep beside me when I am dead.
My first is in some but not in all. My second is in tiny but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing rugs used every day.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.