Due to insomnia, an artist from this movement used exclusively artificial light to create her Umber series. In 2022, the San Francisco MOMA and Baltimore Museum of Art coörganized an exhibition on an artist from this movement whose works included Hemlock. Another artist from this movement created a series of 12 paintings depicting oranges under the name (15[1])“George.” Grace Hartigan was a member of this movement, whose women artists exhibited at its (*) “9th Street” show. The painting Mountains and Sea (10[3])used (10[1])paint thinned by turpentine for an artist from this movement’s “soak-staining” technique. (10[3])Helen Frankenthaler was a member of this movement, as was a woman married to “the Dripper.” For 10 points, name this (10[1])20th century art movement of Lee Krasner and Jackson Pollock. ■END■