JL again, on Harvey Shapiro's review at the time of publication of the (Donald Allen) New American Poets anthology:

He calls particular attention to the poets of the New York School, noting James Schuyler’s insistence on “the connection between the New Poetry and the ideas behind abstract-expressionist art”: the canvas / page as a space “in which to act,” the painting / poem as (he is quoting from Harold Rosenberg’s essay “The American Action Painters”) an “act inseparable from the biography of the artist.”

(- you could consider my poetry a special branch, an offshoot of that direction. see, for example, sections from Dove Street in the archives for 2.20 & 2.21.04)

I haven't read much George Oppen. But on the radio I heard Harvey Shapiro read a war poem by Oppen, from his (Shapiro's) anthology of WW 2 poetry. It was good - simple, understated, a little off to one side.