Atmosphere.................
18 States - North Carolina, Ohio, Alabama, Connecticut, New York, Georgia, Kentucky, Maine, Maryland, Massachusetts, Tennessee, New Jersey, New Hampshire, Pennsylvania, South Carolina, Vermont, West Virginia, and Virginia. The Appalachain mountains are found in these states, so it is only logical sediments could be found inside of them.
Base on my own research and further investigation about the said problem or topic, between the 1000 - 1400 CE, the Pueblo people are building houses called Pueblos that is made from bricks that would withstand an attack from enemies. I hope you are satisfied with my answer and feel free to ask for more
