Oxygen isotope records of carboniferous seasonality on the Russian platform /
annual temperature change of 2'C to 6'C in the early
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | annual temperature change of 2'C to 6'C in the early appears to be the main factor controlling 81 3C variations - between shell edges and mid-shell areas, and distinct growth Carboniferous tropical zone. This seasonality is compatible cathodoluminescence in shell interiors. Only shell edges change in the early Carboniferous Moscow Basin. Evidence for contents at shell edges, different trends of 813C and 8180 contrasts significantly with the conclusion based on growth controlled by temperature, TE contents may be controlled by cycles are found in six profiles, with amplitudes ranging different measures argues that they are all controlled by For carbon isotopes, temperature-depended metabolic activity from -0.4%0 to - 1.2%0, with a mean of -0.8%o, representing from 0.2%c to 2.7%c. The majority of cycles vary in amplitude good shell preservation is the retention of original isotope and electron microprobe analyses on six brachiopod lines in the prismatic secondary layers. Forty-one 8180 metabolic rates and perhaps the reproductive cycle. Mg profiles, and growth lines are 41, 41, 40, and 37 Mn contents in mid-shell areas compared with high Fe and Mn preservation of the six shells includes undetectable Fe and prismatic shell microstructure and the general lack of rate. Except for number of cycles, there are no significant respectively. The similarity in cyclicity of these four rings of fossil woods that there was no significant seasonal seasonal-dependent factors, such as temperature and metabolic Seven isotopic and eight trace element (TE) profiles across shell growth lines are presented, based on over 1000 stable shells (Gigantoproductus), to quantify seasonal temperature show luminescent calcite. Other evidence for good The numbers of cycles recorded in 180 profiles, 13C profiles, variations in the tropics during the early Carboniferous. with the -3'C modern tropic annual temperature range, and |
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| Item Description: | "Major subject: Geology". Vita. |
| Physical Description: | x, 51 leaves : illustrations, maps ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 45-50. |