Video: Pilates week 2 - Rollup

White hydrogen: Naturally occurring hydrogenChromite: Hard, metallic mineral containing iron oxide and chromium oxideUltramafic rocks: Dark-coloured rocks rich in magnesium or iron with very low silica contentOphiolite: A section of the earth’s crust, which is oceanic in nature that has since been uplifted and exposed on landOlivine: A commonly occurring magnesium iron silicate mineral that derives its name for its olive-green yellow-green colour