How did these sand dunes form? At one time, a river ran through this area. When it dried, the sandy bottom formed the dunes.

Gravity caused the grains of sand to fall from a mountain, forming the dunes.

Wind carried the sandy soil from far away and deposited it where it formed huge hills of sand.

A glacier traveled over the land creating the different hills of sand.

White Sands National Monument

The ideas of hammond are most clearly an example of which of the following mid-19th century developments? (5 points) the increasingly liberal nature of slavery after the south enforced stronger slave codes the growing use by northern antislavery activists of moral arguments the increasing number of freed slaves in southern states as a result of gradual emancipation laws the growing tendency of southern slaveholders to use the paternal ethos to justify slavery