How does Leslie Marmon Silko use imagery in Lullaby?

Imagery:

"She watched them dye the yarn in boiling black pots full of beeweed petals, juniper berries, and sage."

"The blankets her mother made were soft and woven so tight that rain rolled off them like birds' feathers. Ayah remembered sleeping warm on cold windy nights, wrapped in her mother's blankets on the hogan's sandy floor."