Volcanology and Stratigraphy of the Western Snake River Plain near Mountain Home, Idaho

1. Late Pliocene basalt sits on fluvial/deltaic sediments depostited along shore of Lake Idaho.

2. Late Pliocene/Pleistocene basalts south of Mountain Home overlie Pliocene Lake Idaho sediments. View to east overlooking Snake River and C.J. Strike Reservoir.

3. Pillow lava delta that dips SE into former Lake Idado.

4. Pleistocene basalt flow NE of Mountain Home overlies well-developed soil horizon with thick caliche zones that sits on older basalt flow.

5. Top of Cinder Cone Butte. Contact between outward-dipping scoria layers that form cinder cone walls (to left) and coarse, poorly layered debris from vent-filling facies of sbombs and blocks. NW of Mountain Home.

6. Crater Rings. View looking south over the western Crater Ring - a large summit caldera that originally contained a lava lake. Higher elevation ramparts formed by fire fountain eruptions that threw spatter and bombs out of the pit crater. Upper photo shows east end of caldera, lower photo shows west end of caldera.