| Abstract: | Sphaerosiderite, a morphologically distinct millimeter-scale spherulitic siderite (FeCO3), forms predominantly in wetland soils and sediments, and is common in the geologic record. Ancient sphaerosiderites are found in paleosol horizons within coal-bearing stratigraphic intervals and, like their modern counterparts, are interpreted as having formed in water-saturated environments. Here we report on sphaerosiderites from four different stratigraphic units, each of which has highly variable 13C and relatively stable 18O compositions. The unique isotopic trends are analogous to well-documented meteoric calcite lines, which we define here as meteoric sphaerosiderite lines. Meteoric sphaerosiderite lines provide a new means of constraining ground-water ??18O and thus allow evaluation of paleohydrology and paleoclimate in humid continental settings. |
| Genre: | Article |
| ProdID: | 70020575 |
| Citation Author: | Ludvigson, G. A.; Gonzalez, L. A.; Metzger, R. A.; Witzke, B. J.; Brenner, R. L.; Murillo, A. P.; White, T. S. |
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| Citation End Page: | 1042 |
| Citation Issue: | 11 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Meteoric sphaerosiderite lines and their use for paleohydrology and paleoclimatology; 1998; Article; Journal; Geology; Ludvigson, G. A.; Gonzalez, L. A.; Metzger, R. A.; Witzke, B. J.; Brenner, R. L.; Murillo, A. P.; White, T. S. |
| Citation Start Page: | 1039 |
| Citation Volume: | 26 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Meteoric sphaerosiderite lines and their use for paleohydrology and paleoclimatology; 1998; Article; Journal; Geology; Ludvigson, G. A.; Gonzalez, L. A.; Metzger, R. A.; Witzke, B. J.; Brenner, R. L.; Murillo, A. P.; White, T. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1998 00:00 -0600 |
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