Sand is porous, so air get get through it, but mud can keep air out.
sand
Sediment covers dead organisms to be fossilized. On land the organism could fall into a lake or swamp, or it can be covered by sand or volcanic ash.
Pink sand is likely made of weathered rhyolite. Rhyolite is a pinkish igneous rock.
Most beach sand is either composed mostly of eroded rock or of mechanically weathered marine organism skeletons, or a combination of both.
sand and gravel deposits
edi
it depends !
Most likely.
mainly high pressure but you'll also need sediment such as rock or sand to smash it and as the soft parts of the plant decay they leave impressions on the rock
Sand dunes are likely to be in a desert
most likely in places that are sandy or have a lots of sand and great wind
Horizontial or vertical, depending on where you cut it.
Perhaps in tiny amounts, but unintentionally. More likely, you would find sand (which is the same chemically as glass).
A grain of sand
Fine sand is more permeable.
Not likely, considering that it has no surface.
sand