Extended Data Fig. 4: Thin section photomicrographs (a,c) and binary images of pore networks (b,d) of Alabaster (a,b) and a porous selenite crystal (c,d), respectively.
From: Orbit-to-ground framework to decode and predict biosignature patterns in terrestrial analogues
a, b, Alabaster contains a well connected intercrystalline pore network (f = ~9.4%) without preferred orientation. c, d, the selenite crystal has a higher total porosity (f = ~11.9%) and larger pores, but pores are parallel to each other (elongated slot pores) and are less well connected in a horizontal direction (growth direction of crystal is up in photomicrograph) Each image is 900 ×900 mm (1750 px 1750 px).
