this eruption style can take the form of either lava flows, spreading across the floor of the paterae, or lava lakes. except for observations by galileo during its seven close flybys, it can be difficult to tell the difference between a lava lake and a lava flow eruption on a patera floor, due to inadequate resolution and similar thermal emission characteristics. intra-patera lava flow eruptions, such as the gish bar patera eruption in 2001, can be just as voluminous as those seen spreading out across the ionian plains. flow-like features have also been observed within a number of paterae, like camaxtli patera, suggesting that lava flows periodically resurface their floors.