Clark Coolidge refers to a working in a mode he calls "prosoid"
Watten, in Total Syntax, elaborates on this, describes it as an "extended, dense, lyric prose form" in which "the balance of words within a sentence, [...] an arrangement, is as much the subject matter here as what the sentences actually say"
antecedents: William Carlos Williams' Kora in Hell
Gertrude Stein's Making of Americans
Surrealist automatic texts
and Robert Creeley's Presences
see Coolidge's "breakthrough work" here, Quartz Hearts (a "preparatory study for his still untitled 'longwork'," which, if I understand correctly, became A Book Beginning What and Ending Away)