| A | B |
|---|
| bedrock | the solid rock layer under soil and gravel |
| butte | an isolated hill that rises suddenly from surrounding flat land |
| deposit | an area in which a great amount of one type of rock or mineral occurs |
| elevation | the height above sea level |
| environment | the surroundings in which a plant or animal lives |
| eruption | the process of emerging violently from within the earth |
| fossil | the traces or imprint of a plant or animal that lived many years ago |
| geyser | a hot spring that sprays water and steam into the air |
| glacier | a huge mass of slowly moving ice |
| mercury | the only metal that is a liquid at room temperature |
| ore | a type of rock that contains enough of a more valuable metal or mineral to make it worth mining |
| phenomena | events that can be observed and studied |
| pinnacle | a high peak |
| prospector | one who looks for valuable metals and minerals |
| specimen | a sample of material taken for study |
| strata | layers |
| topography | the surface features of the earth, such as mountains, valleys, and rivers |
| turf | the top layer of soil that is held together by grass |
| uranium | a white radioactive metal |
| vicinicy | the area nearby |
