The New York Times has a nice obituary of Pirkle Jones who died on March 15, at the age of 95. From 1947-53 he worked as assistant to Ansel Adams, printing his work.
His best known photographs were from a 1956 collaboration with Dorothea Lange The Death of a Valley, which filled a whole issue of Aperture in 1960, and in 1968 after his wife, the Berlin-born photographer Ruth-Marian Boruch (1922-97) became a friend of Eldridge Cleaver’s wife, the two of them photographed the Black Panthers in California. Their pictures of this controversial group drew crowds to the gallery when shown later that year at a San Francisco museum.
As well as the slide show on the NYT and the Black Panther pictures by Jones and Baruch, you can see 10 pictures including some Adamesque landscapes at Joseph Bellows Gallery, a small selection on Artnet and 22 pictures at SFMoMA.