What is oasis america?

Oasis America is a term used to describe the prehistoric cultures of the southwestern United States and northern Mexico that developed in arid landscapes with the aid of irrigation. The primary crop was maize, but beans, squash, and chili peppers were also grown. These cultures included the Hohokam, Anasazi, and Mogollon peoples. They built complex irrigation systems to support their communities and often lived in cliff dwellings, multi-story pueblos, or cave dwellings. They also crafted intricate pottery, created rock art, and developed sophisticated astronomical observatories. The Oasis America cultures disappeared by the mid-16th century, likely due to prolonged droughts and resource depletion.