Manhattan’s Whitney Museum of American Art just opened with a wow, mounting “Georgia O’Keeffe: Abstraction.” This blockbuster writes a new chapter in the annals of O’Keeffe by presenting 130 of the late Santa Fe modernist’s glorious paintings, drawings, watercolors and sculptures, plus Alfred Stieglitz’s portrait photographs of his wife. In addition to her well-known Southwest subjects (animal skulls, adobe churches, the New Mexican landscape), zoomed-in views of blossoms and New York skyscrapers, the nonobjective also held O’Keeffe’s interest. By highlighting such early works as radical, nonrepresentational charcoal drawings from 1915 and canvases depicting curvaceous waves dated 1918, this exhibition resoundingly proves that the pioneering painter ranks among America’s foremost 20th-century abstractionists. Through January 17, at the Whitney Museum of American Art, 945 Madison Ave., New York, 212.570.3600; whitney.org. Catherine D. Anspon