Alcyone Cone lies north of Mount Atlas. It is only slightly lower than Mount Atlas but is much smaller. It has two poorly defined craters and consists of lava flows covered with scree and volcanic bombs when not buried under snow. Taygete Cone north of Mount Atlas appears to be a lava dome bearing traces of hydrothermal alteration and of a small crater. Apart from the lava flows which make up most of Mount Atlas, pyroclastic rocks have been encountered at The Pleiades. The other cones are partly buried by snow and some have breached or otherwise eroded craters.