Figure 3
From: The first physical evidence of subglacial volcanism under the West Antarctic Ice Sheet

TAS diagram of tephra analyzed by μCT from WDC06A core. Phreatomagmatic tephra layers are blue circles (Tephra A) and green triangles (Tephra C). Black squares represent Tephra B, interpreted to be an ash fall deposit from Mt. Berlin, the dominant tephra producing volcano in West Antarctica. Orange oval represents the typical composition of ice core tephra from subaerial West Antarctic Volcanoes.