It appears so.
And, look what those homes are built upon.
It sure ain't bedrock.
Very foolish.
Jesus: But everyone who hears these words of mine and does not put them into practice is like a foolish man who built his house on sand. The rain came down, the streams rose, and the winds blew and beat against that house, and it fell with a great crash. -- St. Matthew 7:26-27
I was trying to remember that quote yesterday!
In some areas there is nothing to build on but sand. Sand can actually be a very stable support for a house. Here in South Carolina there are plenty of areas where you build on sand if you DON'T want to have problems. Of course this excludes extremely steep slopes.