Question

I am an igneous rock black or grey, in colour I am make up most of the ocean floor

Answer 1

Hey mate the answer is :

Basalt

◆●◆●◆ Hope this helps ◆●◆●◆

Answer 2

The igneous rock which exist in the color of either black or grey, making up most of the floor of ocean is the Basalt.

Explanation:

The Basalt is the type of igneous rock which is formed by fast cooling of the volcanic eruption settled on floor.

They exist in black and grey form of color as they are rich in “iron and magnesium” imparting the respective color. The ocean floor is either made up of granite or basalt, but mostly basalt are heavier to settle.