volcanic tuff
51welded tuff — A glass rich, pyroclastic rock composed of volcanic ash indurated at the time of deposition by the welding together of its glass shards under the combined action of the heat retained by particles, the weight of overlying material, and hot… …
52vesicular tuff — GLOSSARY OF VOLCANIC TERMS Tuffs containing millimeter to centimeter sized, irregular to round vesicles which are interpreted to form during trapping of air or vapor in wet ash deposits (Vespermann and Schminke, 2000, p. 683) …
53welded tuff — GLOSSARY OF VOLCANIC TERMS A hard pyroclastic rock compacted by internal heat and pressure from overlying pyroclastic deposits …
54Yellowstone National Park — Yellowstone redirects here. For other uses, see Yellowstone (disambiguation). Yellowstone National Park Grand Canyon of Yellowstone Location …
55GEOGRAPHICAL SURVEY — Names The name Ereẓ Israel (the Land of Israel) designates the land which, according to the Bible was promised as an inheritance to the Israelite tribes. In the course of time it came to be regarded first by the Jews and then also by the… …
56Yucca Mountain nuclear waste repository — Yucca Mountain The proposed design …
57Samoan Islands — For other uses, see Samoa (disambiguation). Samoan Islands Olosega island in the Manu a group, eastern Samoa Islands …
58Achilles Point — (Te Pane o Horoiwi The head of Horoiwi ) is a rocky point on the headland at the eastern end of the small sandy beach named Ladies Bay, Auckland, New Zealand. The name Te Pane o Horoiwi can also sometimes refer to the whole headland between St… …
59Menan Buttes — Elevation 5,619 ft (1,713 m) Location Location …
60Diamond Head, Hawaii — For other uses, see Diamond Head (disambiguation). Diamond Head Diamond Head cone seen from Round Top Road …
