Norite | AMNH https://www.amnh.org/exhibitions/permanent/planet-earth/why-are-there-ocean-basins-continents-and-mountains/non-explosive-volcanism/intrusive-rocks/norite
This norite is composed of plagioclase (labradorite, white) and orthopyroxene (bronzite, brown).
Deep-sea sediment core What Ice Cores Record