Murray 1948 20 Apr 17 Cerro Prieto, 30±ft., 20 mi SSE Mexicali, Baja Calif. This morning moved the camp over to the base of the mountain in a little patch of tmesquite. There is light soil around here instead of sand. Heard a cactus wren. A little while later I climbed the mountain, circling around and coming up the south east side. This is strictly lava, varying from a few solid outcroppings to some areas of small broken up material. Much of the slopes has expanses of quite large rocks which have slid into great piles. There is but little growth, surviving in the earth which has blown into crannies. It is mostly crooote, with some others unknown to me. Most of the vegetation was concentrated in what very few gullies there were. Saw a pair of doves fly from rock to rock. There are two distinct colors of rock; black and a rusty red. Where I was the SE side was largely black while the north was red and also the top. The other end appear blacker. At all points there was a certain amount of intermingling. The rocks were somewhat waterworn, but there was little washing in gullies. Reaching the top I looked out over farmlands to the north, Sierra Coropake