Bigfork Che  |
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biocirculation  |
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SN | As of 1993, no longer a valid term for GeoRef. Usually out-of-scope. Used with ocean circulation. |
biogenic  |
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SN | A valid term through 1977. See biogenic structures; biogenic processes. |
biogeochemical cycles  |
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SN | Not a valid term for GeoRef. See biochemistry and geochemical cycle. |
biological processes  |
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SN | As of 1981, no longer a valid term for GeoRef. Use biology. |
Birmingham  |
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SN | No longer a valid term for GeoRef. After 1992, see Birmingham England; after 1988, see Birmingham Alabama. |
Bitt  |
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bituminous rocks and sands  |
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SN | Not a valid GeoRef index term after 1968. See oil sands; oil shale; bitumens. |
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