We shall assume that the porosity is the same in the two media.
The arrangement of particles has given the samples high porosity, the pores are wide and fluids are therefore free to move, making the samples permeable.
This large effective porosity allows the ingress of water within the grains, with potential damage to the grain upon freezing and thawing.
The difference between scenarios (c) and (d) will be related to the porosity of the regolith.
He saw no major difficulties in postulating peripheral porosities for the blood to circulate, although he could not visualize them for the time being.
However, there are many factors that would affect the thermal conductivity, including the rock type, its mineral composition and porosity.
It is clear from these results that porosity is not the sole criterion for rock colonization by micro-organisms.
As well as the mineralogy of the sample, the textures (grain size, shape, porosity) were determined.
