Fig. 7

The (mesh) pore multi-ROI from a sample from group A (top) and group F (bottom), color-coded by minimum orthogonal/maximum Feret diameter ratio indicating pore elongation. Both have pores mainly near the high end of the scale (orange). However, the sample from Brick A has a significant number of pores ranging from orange down to the lower colors of the scale (yellow, green, blue, and purple). The one from Brick F has only a few small pores in the yellow, green, and blue range, and none are purple