نتایج جستجو برای: event stratigraphy
تعداد نتایج: 206049 فیلتر نتایج به سال:
A high-resolution age–depth profile is presented for a 16-m deep-sea piston core (EW9709-PC07) using three different methods: magnetostratigraphy, fish-teeth strontium isotope stratigraphy, and radiolarian biostratigraphy. Fish teeth are abundant throughout the core, allowing for precise age determinations by Sr isotope stratigraphy. Magnetostratigraphic ages, though not available for this core...
Revised Tertiary Stratigraphy and Paleontology of the Western Beaver Divide, Fremont County, Wyoming
Emry, Robert J. Revised Tertiary Stratigraphy and Paleontology of the Western Beaver Divide, Fremont County, Wyoming. Smithsonian Contributions to Paleobiology, number 25, 20 pages, 6 figures, 1975.•In the western Beaver Divide area in west-central Wyoming, a lens of coarse Tertiary volcanic conglomerate and tuff disconfqrmably overlies Uintan rocks of the Wagon Bed Formation. The coarse volcan...
In this contribution preliminary studies on the application of Optical Coherence Tomography (OCT) to absolute depth calibration of Laser Induced Breakdown Spectroscopy (LIBS) data in application to revealing stratigraphy of easel paintings are presented. The procedure of in-situ monitoring of LIBS by means of OCT is described. Numerical method developed for precise extraction of the depth of th...
1 Faculty of Geosciences, Utrecht University, Utrecht, The Netherlands. E-mail: [email protected] 2 Department of Geological Sciences, California State University, Long Beach CA, USA. E-mail: [email protected] 3 Cambridge Quaternary, University of Cambridge, Cambridge, England, UK. E-mail: [email protected] 4 State Key Laboratory of Palaeobiology & Stratigraphy, Nanjing Institute of Geology & Pa...
1 Institute of Earth Sciences Jaume Almera Consejo Superior de Investigaciones Científicas (ICTJA-CSIC), Barcelona, Spain, 2 Department of Prehistory, Ancient History and Archaeology, Universitat de Barcelona, Barcelona, Spain, 3 Ecological Research Center and Forestry Applications (CREAF-CSIC), Cerdanyola del Vallès, Spain, 4 Department of Stratigraphy, Paleontology and Marine Geosciences, Uni...
One of the key issues associated with the understanding of large scale impacts is how the observable complex crater structural features (e.g., central peaks and pits, flat floors, ring shaped ridges and depressions, tratigraphic modifications, and faults) relate to the impactor's parameters (e.g., radius, velocity, and density) and the nonobservable transient crater measures (e.g., depth of pen...
This study shows that ichonology can be used to refine sequence stratigraphy as well as to interpret the depositional environment of the Kalat Formation (Upper Maastrichtian) in the Central Kopeh- Dagh Basin (NE Iran), Dareh-Gaz section. Field studies and petrography of these deposits led to recognize four lithofacies and nine subfacies that formed in the tidal flat (lithofacies A), lagoon (lit...
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