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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2026
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| Online Access: | https://doi.org/10.1594/PANGAEA.932811 |
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| _version_ | 1867171027427000320 |
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| author | Neumann, Mareike Decker, Charlotte Hallmann, Christian |
| author_facet | Neumann, Mareike Decker, Charlotte Hallmann, Christian |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | This data set contains values on the cheilanthane (tricyclic terpenoids) ratios of C22/C21 and C24/23 from Mesoproterozoic to Silurian rocks of global distribution. Lipid extractions were performed following standard protocols. The yield was contamination-controlled via exterior vs. interior comparison of individual peak concentrations. Values were obtained via integration of multiple-reaction-monitoring (MRM) measurements. In comparing our data of cheilanthane ratios to that reported for younger rocks and oils, we noticed consistently lower C24/C23 values in our samples, suggesting a bimodal character of cheilanthane distribution in time. We tentatively attribute this to the rise of a source of oxidatively decarboxylated cheilanthatriol derived from ferns. Fossil cheilanthanes likely represent a composite mixture of various biological sources, whose secular patterns may record more than the Paleozoic rise of terrestrial plants presented here. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_932811 |
| institution | PANGAEA |
| language | en |
| publishDate | 2026 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Cheilanthane ratios in Mesoproterozoic to Early Paleozoic rocks Neumann, Mareike Decker, Charlotte Hallmann, Christian Biomarkers; Boeryd; Byilkaoora-1; Byilkaoora-2; cheilanthane; Cheilanthane, C22/C21 ratio; Cheilanthane, C24/C23 ratio; Coburn-1; Early Paleozoic; Ed; Empress-1; Event label; Formation; Geologic age name; Girabacken; Laboratory code/label; Marla-3; Minlaton-1; Nas; Outcrop ID; Owen-2; Randall-1; Ross-1; SECTION, height; tricyclic terpenoids; Vattenfall/Omberg; Wilkinson-1; Yalkalpo-2 This data set contains values on the cheilanthane (tricyclic terpenoids) ratios of C22/C21 and C24/23 from Mesoproterozoic to Silurian rocks of global distribution. Lipid extractions were performed following standard protocols. The yield was contamination-controlled via exterior vs. interior comparison of individual peak concentrations. Values were obtained via integration of multiple-reaction-monitoring (MRM) measurements. In comparing our data of cheilanthane ratios to that reported for younger rocks and oils, we noticed consistently lower C24/C23 values in our samples, suggesting a bimodal character of cheilanthane distribution in time. We tentatively attribute this to the rise of a source of oxidatively decarboxylated cheilanthatriol derived from ferns. Fossil cheilanthanes likely represent a composite mixture of various biological sources, whose secular patterns may record more than the Paleozoic rise of terrestrial plants presented here. |
| title | Cheilanthane ratios in Mesoproterozoic to Early Paleozoic rocks |
| topic | Biomarkers; Boeryd; Byilkaoora-1; Byilkaoora-2; cheilanthane; Cheilanthane, C22/C21 ratio; Cheilanthane, C24/C23 ratio; Coburn-1; Early Paleozoic; Ed; Empress-1; Event label; Formation; Geologic age name; Girabacken; Laboratory code/label; Marla-3; Minlaton-1; Nas; Outcrop ID; Owen-2; Randall-1; Ross-1; SECTION, height; tricyclic terpenoids; Vattenfall/Omberg; Wilkinson-1; Yalkalpo-2 |
| url | https://doi.org/10.1594/PANGAEA.932811 |