Earthen Floor. Made of dirt, clay, and straw! Sealed with an oil, like linseed or hemp oil.
Rammed earth structure
Further Improved Rammed Earth Stoves, or F.I.R.E.S., are promoted by the East Africa Trust as a way to improve self-sufficiency and sustainability in Malawi, Kenya, Tanzania, Rwanda, Mozambique and beyond.
rammed earth wall section detail. there's something about rammed earth that I love as a building material.
Rammed earth fireplace
Rammed Earth Ranch - stair detail, via Flickr by Ethan Stead Photography