| Title | Graphic correlation of the upper Eifelian to lower Frasnian (Middle-Upper Devonian) conodont sequences in the Spanish Central Pyrenees and comparison with composite standards from other areas |
| Author | Gouwy, S; Liao, J -C; Valenzuela-Rios, J I |
| Source | Palaeontologia Electronica vol. 19.3, 19.3.39A, 2016, 18 pages |
| Links | Online - En ligne
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| Year | 2016 |
| Alt Series | Earth Sciences Sector, Contribution Series 20150480 |
| Publisher | Coquina Press |
| Meeting | 125th Anniversary Annual Meeting & Expo ; The Geological Society of America; Denver; US; October 27-30, 2013 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Area | Spanish Central Pyrenees; Spain |
| Lat/Long WENS | 0.0000 2.0000 43.0000 42.0000 |
| Subjects | paleontology; stratigraphy; Middle Devonian; biostratigraphy; microfossils; conodonts; correlations; systematic paleontology; micropaleontology; paleogeography; fossil zones; chronostratigraphy;
Phanerozoic; Paleozoic; Devonian |
| Illustrations | geological sketch maps; correlations; stratigraphic charts; graphs; tables |
| |
| Program | Mackenzie Corridor, Shield to Selwyn, GEM2: Geo-mapping for Energy and Minerals |
| Program | Project 596: Climate Change and Biodiversity Patterns in the Mid-Paleozoic, International Geoscience and Geoparks Program |
| Abstract | Through graphic correlation of Eifelian-Givetian sections from different facies settings in the Spanish Central Pyrenees, a local composite standard based on conodonts, is established to which new data
from the Pyrenees can be related. This local conodont database is compared and correlated with the Middle Devonian composite standard already containing data from the Anti-Atlas (Morocco), the Ardenne (Belgium), and the composite standard of the
Montagne Noire. The correlation project comprises three Pyrenean sections (Compte, Villech and La Guàrdia d'Ares) belonging to the same paleogeographical setting tectonically located in the southern part of the European Variscan Chain. The Compte
section, yielding the most complete and detailed conodont succession for the Givetian, is selected as reference for the correlation project. The combination of data from these sections permits identification, by means of the index taxa, of all
Givetian standard conodont zones and subzones. The high resolution correlation and comparison of these sections shows thickness differences in several intervals. This study is an important step in the construction of the Pyrenean high resolution
composite standard that, integrated into the Anti-Atlas, Montagne Noire and Ardenne composite standard, will contribute to the construction of a global Middle Devonian conodont database and the improvement of chronostratigraphy and accuracy in
intercontinental correlations for the Eifelian and Givetian stages. |
| Summary | (Plain Language Summary, not published)
This paper reports on the use of tooth-like microfossils (conodonts) to correlate Middle Devonian (339.3 -382.7 Ma) sections from the Spanish Central
Pyrenees based on the graphic correlation method. This method correlates sections by plotting first and last occurrences of all available species on an X-Y-graph. The method allows projection of data from a section onto another, building a database
containing all available conodont data for the studied region. The database from the Spanish Central Pyrenees is a first step in the construction of a global database for the Middle Devonian as databases from the Ardenne (Belgium), Anti-Atlas
(Morocco) and Montagne Noire (France) will soon be merged with it. A global Middle Devonian database will improve the accuracy of intercontinental correlations and correlations between different marine environments. It will also be a great aid in the
study of conodonts in newly explored areas such as the Mackenzie Basin in NW Canada. |
| GEOSCAN ID | 297825 |
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