It depends on how you are defining the word 'soft'. Quartzite is the hardest and most durable of the three - no question there. Shale can be crumbled with the tap of a hammer. Some loosely cemented sandstone can be crumbled when squeezed hard enough with your hand and some is well cemented and quite hard.
Sandstone will typically have larger grain size than shale (sand sized particles versus silt and clay sized particles).
gypsum,sandstone and shale
permeability
Sandstone is extremely porous and absorbs liquids like a sponge.. Shale is nearly impervious to liquids.
Limestone, Sandstone, Shale
Because sandstone has wider particles than shale and this let's the water through.
gypsum,sandstone and shale
the answer is sandstone
pure sandstone = 10 ohm pure shale = 5 ohm
Basalt. Shale, Sandstone, and Limestone are all sedimentary rocks
shale
Shale forms in layers of sandstone or lime.
No. Shale forms from clay and silt, which are much finer than the sand that forms sandstone.
shale is metamorphic, which means time, pressure and temperature has altered it. Sandstone is sedimentary which means it was formed under water. generally sandstone is younder.
Quartzite
Because shale and sandstone don't let water pass them, but conglomerate does
shale and sandstone
here are four easy types of sedimentary rocks: limestone, sandstone, shale, and coal. =)