Advertisement

You are browsing the archive for Ooid Archives - AGU Blogosphere.

11 September 2011

Geology Word of the Week: O is for Ooid

def. Ooid: A small (generally less than 2 mm), spherical or ellipsoidal concretion of calcium carbonate (CaCO3) that has generally formed around a “nucleus” such as a shell fragment or a quartz grain. The word ooid is derived from an ancient Greek word meaning egg-shaped. According to the Oxford English dictionary, the name came about because ooids resemble roe (fish eggs). Some geology words I love just because they’re just …

Read More >>