Rocky outcrops are as follows from bottom to top: 1) old, beat up lava, 2) thin red, oxidized breccia (40-50 m), 3) second breccia, less oxidized, cliff former(50-60 m), 4) third breccia, larger clasts, cliff former, clasts are glassy or scoriaceous. At or near top is black dark dike, glassy, highly jointed. 2nd breccia scours into lowest breccia at contact. Black dike rock, glassy sparsely phyric to aphyric. Highly jointed, somewhat crummy sample.
Volcanism on Unimak Island, Alaska, USA: a special focus on Shishaldin and Fisher volcanoes