structure en atolls

CONT: Chromites deposited with interstitial silicate liquid may suffer corrosion and partial resorption to produce atoll textures and rounded grains, whereas those developed in monomineralic bands may, during the cooling of a large parent intrusion, suffer auto-annealing and develop foam texture.
OBS: core texture: In this texture, a second mineral occurs on the inside of an area of another mineral. Where the residual rim is at the same time enclosed in a mass of the invading mineral, the term atoll texture is more appropriate.