Deer’s Skull with Pedernal, Georgia Okeeffe
In the Museum of Fine Arts Boston
Though it looks almost like watercolor in the handling, particularly of the skull itself, this was done in oil on canvas.
According the the museum’s page for this piece, “Pedernal” is the name of the flat-topped mountain in the background, which Okeeffe painted numerous times, and about which she joked: “It’s my private mountain. It belongs to me. God told me if I painted it enough, I could have it.”
Link: Deer's Skull with Pedernal, MFA Boston