The pyramid does not distinguish between whole grains and refined grains.

One environment for meiofauna is between grains of damp sand (see Mystacocarida).

Water in the pores between grains of sediment provides pressure that bears some of the load.

This void space is mostly on small scales (millimeters to 1-m), between individual grains and boulders.

The spaces between grains are filled with sparry cement.

On the other hand, Kids can imagine the empty space between grains just fine.

There are even microbes that live inside rocks, or in the pores between grains of minerals.

This causes increased pressure between grains thus increasing the solubility of grains.

Kaolinite is frequently found filling the space between grains.

A few tiny species that live between grains of sand have statocysts, which sense balance.