Opal - a new hydromorphic precipitate type from gravel deposits in southern Finland
Opal precipitates have been found from eleven localities in eskers and ice-marginal formations in southern Finland. The precipitates occur above the present groundwater table in porous gravel layers near the surface. The depth is commonly around 1‒2 m. The precipitates build thin (up to 0.3 mm), ver...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Geological Society of Finland
1991-12-01
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| Series: | Bulletin of the Geological Society of Finland |
| Subjects: | |
| Online Access: | http://www.geologinenseura.fi/bulletin/Volume63/sgs_bt_063_2_pages_095_104.pdf |