Beverly Pepper (December 20, 1922-February 5, 2020) was an American artist known for her towering sculptures of steel, stone, iron, and earth.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Beverly_Pepper
Toro by Beverly Pepper
1962 / Steel and wood / 73-3/4″x47″x23″ / San Francisco Museum of Modern Art, CA
Beverly Pepper on Artnet: http://www.artnet.com/artists/beverly-pepper/