Onatah Corona is a feature on Venus adjacent to Ba'het Corona. Both features are surrounded by a ring of ridges and troughs, which in places cut more radially-oriented fractures. The centers of the features also contain radial fractures as well as volcanic domes and flows. Coronae are thought to form due to the upwelling of hot material from deep in the interior of Venus. (wikipedia entry)
A corona is an oval feature. On Venus they are named after fertility and earth goddesses.
Image Source. Marker locations are approximate and may not always appear to align with image on map.