By sweeping the darker desert
soil off the bright limestone underneath,
ancient peoples
created white lines that are easily visible at great distances.
The geography of the Hudson Valley is immensely rich: The terrain features sandstone, red beds, granite cliffs, dense forests and charming lakes, as well as highly fertile
soil for farming, such as in the Black Dirt Region
created from an
ancient glacial lake, and a rich biodiversity of flora and fauna.