Extended Data Fig. 2: CT scan image of the uppermost 7.5 cm of sediment from the ASIG core.
From: Deglaciation of the Prudhoe Dome in northwestern Greenland in response to Holocene warming
Sediment was collected in an opaque PVC tube for luminescence analysis. During drilling or sample extraction, a chunk of the uppermost sediment became loose. However, using the CT scan image, we were able to reconstruct its original orientation. In this image, the red lines on both chunks show where they were connected, the blue line shows the original top surface, and the yellow line shows the original side surface. The bright spot in the top of the image is a tooth from the drill chuck that was dropped down the borehole during drill operations.
