Murray 1947 21 Apr 17 Cerro Prieto, 20 mis SE Mexicali, Baja California running along the west, with desert in between and to the south. Then on the east side there was some flood water from the Colorado, and alkali flats. On each side the lava run out appeared mixed with the soil somewhat and was greatly cut up from the water runoff. At the top the rock was mostly outcroppings or finer material, with much more plant life. Tufts of grass are growing though much dried out. There is more of other bushes also. One tiny gray bush with holly like leaves was too common, though more often dead than not. At the top I looked down on a distinct crater, with a flat bottom of cracked mud. It was roughly 210 by 80 yards at the bottom, and very roughly 250 yds across at the top. From the base of the crater to the uppermost point was about 280ft. Growing in the mud is some creosote, just a few mesquites and some other bushes mostly at the outer edges. There are many names and initials spelled out with rock. Two lizards rapidly disappeared - acted like Cnemidophorus. There were