Fig. 4From: Microscopic weathering mechanisms of subflorescence and crust patterns in the Nankan Grotto, northern Sichuan, ChinaPorosity and pore size distribution frequency results of the rock samples. a Porosity and pore size distribution frequency of sample S1. b Porosity and pore size distribution frequency of sample S2. c Porosity and pore size distribution frequency of sample C1. d Porosity and pore size distribution frequency of sample C2. Samples S0 and C0 were too fragmented to conduct porosity measurements onBack to article page