25 Roosevelt Dam (Rausme Prof. Rep. 98) "The gorge through which Salt River, after passing the Roosevelt dam, traverses the south end of the Chagatgal Range affords an excellent section of the reds from the Miss. down to the granite." On road to [illegible]. The base of the red series is exposed at not far distant from the dam. Pinal coarse red granite, old erosion surface. Azurdon eoyl. 30' Bottles, up to 9" Rounded white quartz, from quartzite and red Jasper. Metric dull red-brown coarse sandstone. Pioneer shale. Othase catonic, cross-bedded sandstone streaked with light spots, has some pebble. These 30' sandstones, followed by maroon shale, the whole [illegible]. Great Diabase sill 700'-800'. Hardly any metamorphism above and below. Then the upper Pioneer Shale 100'. The whole is 200' of shales thin scuttling, except in places, but very sandstone. Barnes eoyl. Pebbles less than 4" 15'-20' Dripping Spring quartzite 500-600'. Lower 140' banded reddish-brown quartzite with bits of shale. Each quartzite zone about 10'. Then thinner quartzites that are cross-bedded. Upper 180' laminated dull-red and black quartzite. All in pieces of pebbles.