Most weaving cultures use a horizontal loom. The Navajos were nomadic so they use a vertical loom that could be hung from a tree branch as they moved from place to place. Note the sand painting above the loom, also a Navajo art.
Ganado Red style woven by Ester Harvey
Two Grey Hills style woven by Virginia Yazziee
Another Two Grey Hills rug. It is smaller but has a very tight weave. More threads per inch results in finer detail.
Storm Pattern style woven by Angela Begay
Another Storm Pattern Woven near Page, AZ by Irene Sanders