J.C. Scharl at Religion And Liberty:
McCarthy’s writing is poetic. By that I mean that many of McCarthy’s sentences do not appear to exist to serve some purpose outside themselves: their language, the texture of the sounds, the relations (often ironic, in his case) between the words and their meanings—all this is the province of poetry.
Specifically, his writing is elegiac. An elegy is a poetic song of something lost or passing away; it is an act of deliberate, careful recording, a close look at what is gone so we can fix its virtues in our mind before time obliterates even the memory of what used to be.
McCarthy is a master of the elegiac sentence, the vivid description that is itself a piling up of themes (in his case, almost always tragic themes), the sentence in which the metonymy or the synecdoche or the metaphor is so perfectly realized that there is no linguistic bridge between what is and what is meant, in which the description is a farewell.
more here.