GEOSCAN Search Results: Fastlink


TitleGraphic 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
AuthorGouwy, S; Liao, J C; Valenzuela-Rios, J I
SourcePalaeontologia Electronica vol. 19.3, 19.3.39A, 2016, 18 pages,
Alt SeriesEarth Sciences Sector, Contribution Series 20150480
PublisherCoquina Press
Meeting125th Anniversary Annual Meeting & Expo ; The Geological Society of America; Denver; US; October 27-30, 2013
Mediapaper; on-line; digital
File formatpdf; html
AreaSpanish Central Pyrenees; Spain
Lat/Long WENS 0.0000 2.0000 43.0000 42.0000
Subjectspaleontology; stratigraphy; Middle Devonian; biostratigraphy; microfossils; conodonts; correlations; systematic paleontology; micropaleontology; paleogeography; fossil zones; chronostratigraphy; Phanerozoic; Paleozoic; Devonian
Illustrationsgeological sketch maps; correlations; stratigraphic charts; graphs; tables
ProgramMackenzie Corridor, Shield to Selwyn, GEM2: Geo-mapping for Energy and Minerals
ProgramProject 596: Climate Change and Biodiversity Patterns in the Mid-Paleozoic, International Geoscience and Geoparks Program
LinksOnline - En ligne
AbstractThrough 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.