 | | Book | | to Lower Miocene John Day Formation in central Oregon (Hay, 1963a), The ash was wind-lain and reworked...500 meters thick) containing fresh glass, montmorillonite clay, and opal; a transition zone (up to 20...thick) that contains fresh glass, opal, and montmorillonite; a middle zone (up to 10 meters thick) containing...molten volcanic rock comes in contact with water (river, lake, or damp surface) the base of the flow is...where the basalt flowed into a Pliocene lake or river (Fig. 5)(Robert et at., 1988). The massive , flow | | | Book | | to Lower Miocene John Day Formation in central Oregon (Hay, 1963a), The ash was wind-lain and reworked...500 meters thick) containing fresh glass, montmorillonite clay, and opal; a transition zone (up to 20...thick) that contains fresh glass, opal, and montmorillonite; a middle zone (up to 10 meters thick) containing...molten volcanic rock comes in contact with water (river, lake, or damp surface) the base of the flow is...where the basalt flowed into a Pliocene lake or river (Fig. 5)(Robert et at., 1988). The massive , flow |  | | Report (issue) | | See Montana 6 Hells Canyon Study Area, Oregon and Idaho See Oregon 10 Idaho Wilderness 11 Italian Peak and...area, Washington and Idaho See Washington 7 Salmon River Breaks Primitive Area and vicinity 16 Sawtooth National...is drained by the Big Lost River, the southwestern half by the Big Wood River. The nearest highways are...west side of the study area along the Big Wood River and U.S. 93 Alternate northeast of the study area...East Fork Big Lost River into Copper Basin, Star Hope Creek, and Muldoon Canyon; up North Fork Big Lost |
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