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Geological Survey Professional Paper 294—K
The Rocks and Fossils of Glacier National Park: The Story of Their Origin and History |
APPENDIX E: Glossary
| Bedding | The layers in sedimentary rocks. |
| Conceptacle | A cavity opening to the surface of an algal colony; contains reproductive organs. |
| Crenulate | The minutely wavy character of the laminae in an algal colony. |
| Environment | The total of all the conditions acid influences affecting the life and development of an organism. |
| Fault | A fracture in rock along which displacement has occurred. |
| Filament | A threadlike series of algal cells. |
| Fossil | A remain or a trace of a plant or animal of past geological ages, or direct evidence of its presence preserved in the rocks. |
| Algal head | Term used to refer to a single algal structure. |
| Joint | A simple fracture that is at some angle to the bedding of a rock. |
| Laminae | Thin layers; in this report, the thins subparallel to concentric layers of rock that comprise a colony of fossil algae. |
| Reef | A ridge or mound of sand or rock lying at or near the surface of the water. In organic reefs the ridge or mound is composed of the skeletons of organisms. |
| Turbinate | Shaped like a spinning top. |
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Last Updated: 08-Jul-2008