While the rocky island to the left shows columns, suggesting basalt that cooled relatively slowly from a melt (but not slowly enough to form large crystals), the headland to the back right shows clear bedding. This likely represents water-cooled basalt spalling off the advancing front of the flow. The small white rectangle in the lower right is a sign that prohibits going past that promontory, so even if the back head is physically accessible at low tide (this was near high tide), it's a protected area. Without a permit, one is not going to get close enough to determine what textural or compositional differences create the marked bedding. This is a situation where trying to identify the broad rock class is a rather pointless exercise, in my opinion. Is it sedimentary or volcanic/igneous? Yes.