It [the ground] does not mark the boundary between the mental and the material or between conceptual reason and sensory experience; nor does it separate the consciousness of the labourer from the soil on which he works. It does not, in short, envelop the material world but rather comprises an interface, within a world of materials, between the relatively solid substances of the earth and the relatively volatile medium of the air (Gibson 1979: 16)

There are objects, which may be attached or detached, enclosures such as caves and burrows, convexities such as hills, concavities such as hollows, and apertures such as cracks and openings.

The experience of weather lies at the root of our moods and motivations; indeed it is the very temperament of our being. It is therefore critical to the relation between bodily movement and the formation of knowledge.

scattered

constant grinding

Do you need to see the process?