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2009

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Articles 6811 - 6840 of 7616

Full-Text Articles in Physical Sciences and Mathematics

Petrogenesis Of The Refahiye Ophiolite And Its Tectonic Significance For Neotethyan Ophiolites Along The İzmir-Ankara-Erzincan Suture Zone, Ender Sarifakioğlu, Hayretti̇n Özen, John A. Winchester Jan 2009

Petrogenesis Of The Refahiye Ophiolite And Its Tectonic Significance For Neotethyan Ophiolites Along The İzmir-Ankara-Erzincan Suture Zone, Ender Sarifakioğlu, Hayretti̇n Özen, John A. Winchester

Turkish Journal of Earth Sciences

The Refahiye ophiolite, situated near Erzincan in the eastern part of the İzmir-Ankara-Erzincan Suture Zone (İAESZ), is one of the best exposures of oceanic lithosphere in the northern branch of the Neotethyan Ocean. The ophiolite, mainly thrust southwards, transported on an ophiolitic mélange, over the Early Triassic-Campanian Munzur Limestone of the Anatolide-Tauride Platform, was also emplaced by north-directed backthrusting onto the Pontides in the Late Cretaceous. It displays an almost complete ophiolite series unconformably overlain by Tertiary volcano-sedimentary units. The mantle peridotites are dominated by harzburgites, with dunite bands and lenses locally cut by isolated diabase dykes, whereas the mafic-ultramafic …

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The Electrical Conduction Mechanisms And Thermoelectric Power Of Snse Single Crystals, M. M. Nassary Jan 2009

The Electrical Conduction Mechanisms And Thermoelectric Power Of Snse Single Crystals, M. M. Nassary

Turkish Journal of Physics

Single crystals of SnSe were prepared in our laboratory by a special modified Bridgman technique. Measurements of the electrical conductivity and Hall effect between 141 K and 553 K were carried out on SnSe sample in two crystallographic directions. The investigated sample was found to be of p-type conductivity. The Hall mobilities parallel and perpendicular to layers plane at room temperature, were 7835.9 cm^2/ V \cdots and 7274.7 cm^2/ V.s, respectively. The free carrier concentration P = 3.52 \times 10^{12} cm^{-3} at room temperature. Also, the thermoelectric power (TEP) was investigated in the temperature range from 176 to 553 K. …

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Thermoelectric Power And Low-Field Electron Mobility In Al_Xga_{1-X}N Lattice-Matched To Gan, H. Arabshahi Jan 2009

Thermoelectric Power And Low-Field Electron Mobility In Al_Xga_{1-X}N Lattice-Matched To Gan, H. Arabshahi

Turkish Journal of Physics

The results of thermoelectric power and electron drift mobility in Al_xGa_{1-x}N lattice-matched to GaN are calculated for different temperatures, free-electron concentrations and compositions. The two-mode nature of the polar optic phonons is considered jointly with deformation potential acoustic, piezoelectric, alloy and ionized-impurity scattering. Band non-parabolicity, admixture of p functions, arbitrary degeneracy of the electron distribution and the screening effects of free carriers on the scattering probabilities are incorporated. The Boltzmann equation is solved by an iterative technique using the currently established values of the material parameters. The iterative results are in fair agreement with other recent calculations obtained using the …

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Vulnerability Of Shallow Tidal Water Habitats In Virginia To Climate Change, Donna Marie Bilkovic, Carl H. Herschner, Tamia Rudnicky, Karinna Nunez, Daniel E. Schatt, Sharon Kileen, Marcia Berman, Center For Coastal Resources Management, Virginia Institute Of Marine Science Jan 2009

Vulnerability Of Shallow Tidal Water Habitats In Virginia To Climate Change, Donna Marie Bilkovic, Carl H. Herschner, Tamia Rudnicky, Karinna Nunez, Daniel E. Schatt, Sharon Kileen, Marcia Berman, Center For Coastal Resources Management, Virginia Institute Of Marine Science

Reports

The principal objective of this study was to develop a characterization of current shallow-water habitat components in Virginia tidal waters and predict climate driven changes to these habitats. To project broad-scale climate change effects on the abundance and distribution of coastal habitats, an inundation model based on anticipated relative sea-level rise, temperature and salinity projections, and coastal development were integrated into a GIS modeling framework. Using this framework, simple models were constructed that forecast the distribution of key coastal habitat parameters within the next 50 to 100 years including: shallow-water areas, tidal wetlands, submerged aquatic vegetation and estuarine beaches. The …

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Evaluating The Effectiveness Of Micro-Hydropower Projects In Nepal, Shradha Upadhayay Jan 2009

Evaluating The Effectiveness Of Micro-Hydropower Projects In Nepal, Shradha Upadhayay

Master's Theses

No abstract provided.

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Software Reverse Engineering Education, Teodoro Cipresso Jan 2009

Software Reverse Engineering Education, Teodoro Cipresso

Master's Theses

No abstract provided.

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Sustainability Of Potable Water In The Pilbara, Timothy P. Pidhirnyj Jan 2009

Sustainability Of Potable Water In The Pilbara, Timothy P. Pidhirnyj

Theses

This paper provides an examination of current and future demands on potable (drinking) water in the Pilbara. In this examination, it builds a picture summarizing human habitation in the Pilbara, and the nature in which the Western Australia state and Commonwealth governments assess and manage resources in the Pilbara, state wide, and nationally. Following on, water demand is broken down into its major user groups per town, and future demand is estimated based on publically available documents. It will be shown that water demand in certain areas of the Pilbara will exceed their licensed extraction limits within the next 20 …

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Environmentally Friendly Organic Synthesis Using Bismuth Compounds. Bismuth(Iii) Bromide Catalyzed Synthesis Of Substituted Tetrahydroquinoline Derivatives, Ram Mohan, Jamie Rogers, Justin Ernat, Herbie Yung Jan 2009

Environmentally Friendly Organic Synthesis Using Bismuth Compounds. Bismuth(Iii) Bromide Catalyzed Synthesis Of Substituted Tetrahydroquinoline Derivatives, Ram Mohan, Jamie Rogers, Justin Ernat, Herbie Yung

Scholarship

The bismuth bromide catalyzed synthesis of a range of substituted tetrahydroquinoline derivatives via a three component coupling reaction between substituted anilines and enol ethers is reported. Bismuth compounds are attractive for use as catalysts because of their remarkably low toxicity. Bismuth bromide is relatively inexpensive and easy to handle, and hence preferable to other corrosive catalysts previously used for synthesis of tetrahydroquinoline derivatives.

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Buoy Dynamics In Subsurface Zones, Randy Guillen Jan 2009

Buoy Dynamics In Subsurface Zones, Randy Guillen

Undergraduate Journal of Mathematical Modeling: One + Two

The objective of this paper is to find the tension acting on a line that anchors a buoy submerged just beneath the surface of the ocean. Since the problem statement only gives the geometric shapes and dimensions of the buoy, we must use calculus to find its volume and surface area through integration of the volumes and surfaces of revolution formed by the specific parts of the buoy along an axis. The volume and surface area determine the buoyancy force and force of gravity, the two forces acting on the buoy that affect the tension in the line. After calculating …

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That's A Drag: The Effects Of Drag Forces, Shane Maxemow Jan 2009

That's A Drag: The Effects Of Drag Forces, Shane Maxemow

Undergraduate Journal of Mathematical Modeling: One + Two

Drag is a force that opposes motion due to an object's shape, material, and speed. This project defined what drag force is, derived the governing equation for drag and listed some applications of drag forces. Derivation of the drag equation was achieved using the Buckingham π theorem, a dimensional analysis tool. Lastly, this project explored the problem of how long and how far a dragster takes to stop once its parachute is deployed.

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Modulus Of Subgrade Reaction And Deflection, Austin Potts Jan 2009

Modulus Of Subgrade Reaction And Deflection, Austin Potts

Undergraduate Journal of Mathematical Modeling: One + Two

Differential equations govern the bending and deflection of roads under a concentrated load. Identifying critical parameters, such as the maximum deflection and maximum bending moments of a street supported by an elastic subgrade, is key to designing safe and reliable roadways. This project solves the underlying differential equation in pavement deflection and tests various parameters to highlight the importance in selecting proper foundation materials.

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Repeatability Estimates Of Sloped Scattered Data, Angelique Waller Jan 2009

Repeatability Estimates Of Sloped Scattered Data, Angelique Waller

Undergraduate Journal of Mathematical Modeling: One + Two

Repeatability is the variance in data accumulated under fixed conditions. It is important for quality control as it costs both time and money to recalibrate tools and remanufacture machines. This project compares three methods for approximating the repeatability of a sloped scattered data set. The first method uses a linear approximation, the second involves rotating the data points, and the third calculates distance using right triangles. The methods are compared for both precision and ease of use.

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Sustainable Trail Management: A Transdisciplinary Approach, Sinead O'Connor-Gotra Jan 2009

Sustainable Trail Management: A Transdisciplinary Approach, Sinead O'Connor-Gotra

Theses, Doctoral

The research reported has created a holistic model for sustainable trail management that is broader than the quantitative assessment of ecological trail degradation. The range of quantitative and qualitative results gathered show that a more realistic treatment of sustainable trail management needs is achieved through a qualitative, participative and flexible research process. The investigation focuses primarily on the assessment of trail degradation in the uplands of Co. Wicklow, Ireland where signs of deterioration have been observed as a consequence of recreational use. The nature and extent of trail degradation was assessed using a variety of techniques including qualitative and quantitative …

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An Estimate Of The Branching Fraction Of Tau -> Pi Eta 'Nu(Tau), Shmuel Nussinov, A. Soffer Jan 2009

An Estimate Of The Branching Fraction Of Tau -> Pi Eta 'Nu(Tau), Shmuel Nussinov, A. Soffer

Mathematics, Physics, and Computer Science Faculty Articles and Research

We calculate the expected branching fraction of the second-class-current decay tau -> pi eta 'nu(tau), motivated by a recent experimental upper-limit determination of this quantity. The largest contribution to the branching fraction is due to the intermediate a(0)(980) scalar meson, assuming it is a (u) over bard state. Smaller contributions arise from a(0)(1450), rho(770), and rho(1450). Our calculated values are substantially below the experimental upper limit, and are smaller still if the a(0)(980) is a four-quark state, as often suggested. Thus, a precise measurement or tight upper limit has the potential to determine the nature of the a(0)(980), as well …

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Modelling Situation Awareness For Context‐Aware Decision Support, Yu-Hong Feng, Teck-Hou Teng, Ah-Hwee Tan Jan 2009

Modelling Situation Awareness For Context‐Aware Decision Support, Yu-Hong Feng, Teck-Hou Teng, Ah-Hwee Tan

Research Collection School Of Computing and Information Systems

Situation awareness modelling is popularly used in the command and control domain for situation assessment and decision support. However, situation models in real-world applications are typically complex and not easy to use. This paper presents a Context-aware Decision Support (CaDS) system, which consists of a situation model for shared situation awareness modelling and a group of entity agents, one for each individual user, for focused and customized decision support. By incorporating a rule-based inference engine, the entity agents provide functions including event classification, action recommendation, and proactive decision making. The implementation and the performance of the proposed system are demonstrated …

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Cyclohepta[De]Naphthalenes And The Rearranged Abietane Framework Of Microstegiol Via Nicholas Reaction Chemistry, Rafiq A. Taj, Anusha Abhayawardhana, James R. Green Jan 2009

Cyclohepta[De]Naphthalenes And The Rearranged Abietane Framework Of Microstegiol Via Nicholas Reaction Chemistry, Rafiq A. Taj, Anusha Abhayawardhana, James R. Green

Chemistry and Biochemistry Publications

Nicholas reactions on 2,7-dioxygenated naphthalenes give C-1 monosubstitution and C-1/C-8 disubstitution in most cases. From gamma-carbonyl cation monocondensation product 3b or alkyne-unsubstituted dicondensation product 4a, cyclohepta[de]naphthalenes bearing no substituents, gem-dimethyl substituents, and a ketone function, and the rearranged abietane framework of microstegiol may be prepared.

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Ecosystem Services In Decision Making: Time To Deliver, James Salzman, Gretchen C. Daily, Stephen Polasky, Joshua Goldstein, Peter M. Kareiva, Harold A. Mooney, Liba Pejchar, Taylor H. Ricketts, Robert Shallenberger Jan 2009

Ecosystem Services In Decision Making: Time To Deliver, James Salzman, Gretchen C. Daily, Stephen Polasky, Joshua Goldstein, Peter M. Kareiva, Harold A. Mooney, Liba Pejchar, Taylor H. Ricketts, Robert Shallenberger

Faculty Scholarship

Over the past decade, efforts to value and protect ecosystem services have been promoted by many as the last, best hope for making conservation mainstream – attractive and commonplace worldwide. In theory, if we can help individuals and institutions to recognize the value of nature, then this should greatly increase investments in conservation, while at the same time fostering human well-being. In practice, however, we have not yet developed the scientific basis, nor the policy and finance mechanisms, for incorporating natural capital into resource- and land-use decisions on a large scale. Here, we propose a conceptual framework and sketch out …

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The Deterrent Effect Of Death Penalty Eligibility: Evidence From The Adoption Of Child Murder Eligibility Factors, Michael D. Frakes, Matthew Harding Jan 2009

The Deterrent Effect Of Death Penalty Eligibility: Evidence From The Adoption Of Child Murder Eligibility Factors, Michael D. Frakes, Matthew Harding

Faculty Scholarship

We draw on within-state variations in the reach of capital punishment statutes between 1977 and 2004 to identify the deterrent effects associated with capital eligibility. Focusing on the most prevalent eligibility expansion, we estimate that the adoption of a child murder factor is associated with an approximately 20% reduction in the homicide rate of youth victims. Eligibility expansions may enhance deterrence by (1) paving the way for more executions and (2) providing prosecutors with greater leverage to secure enhanced non-capital sentences. While executions themselves are rare, this latter channel is likely to be triggered fairly regularly, providing a reasonable basis …

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Optimization Of The Microprecipitation Procedure For Nuclear Forensics Applications, Lyndsey Renee Kelly Jan 2009

Optimization Of The Microprecipitation Procedure For Nuclear Forensics Applications, Lyndsey Renee Kelly

UNLV Theses, Dissertations, Professional Papers, and Capstones

Microprecipitation has become one of the most widely used sample preparation techniques for alpha spectroscopy. Many factors during the precipitation process can affect the yield and energy resolution by adding unwanted mass to the sample. Current applications in nuclear forensics call for an optimization of energy resolution and yield in order to improve identification and quantify specific radionuclides. The purpose of this research is to determine the optimal parameters used for microprecipitation. The optimal solution temperature, precipitation time, carrier amount, and hydrofluoric acid amount are used to investigate the influence of varying the type of carrier, as well as, the …

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Spectroscopic Study Of The Dimerisation Process Of Iron Protoporphyrin Ix, K. Dziedzic-Kocurek, Hugh Byrne, A. Swiderski, J. Stanek Jan 2009

Spectroscopic Study Of The Dimerisation Process Of Iron Protoporphyrin Ix, K. Dziedzic-Kocurek, Hugh Byrne, A. Swiderski, J. Stanek

Articles

The commercial protoporphyrin IX, iron-ferriprotoporphyrin IX-chloride and synthesized iron porphyrin μ-oxo-dimers were examined by UV/vis absorption and fluorescence, Fourier transformed infrared spectroscopy, resonance Raman, X-ray absorption, Mössbauer spectroscopy and SQUID. The evidence of Fe-O-Fe antiferromagnetic coupling concluded from SQUID and Mössbauer in the case of samples containing dimerized forms confirmed the presence of the oxo-bridges. In this paper the results of UV/vis, fluorescence, Fourier transform infrared FTIR and Raman spectroscopies are reported and discussed. The study is based on the comparison of the free-base protoporphyrin IX, Fe-PPIX-Cl and the synthesized dimerized specimen. The vibrational modes in two energy regions i.e. …

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A Test Battery Approach To The Ecotoxicological Evaluation Of Cadmium And Copper Employing A Battery Of Marine Bioassays, Ailbhe Macken, Michelle Giltrap, Kim Ryall, Barry Foley, Evin Mcgovern, Brendan Mchugh, Maria Davoren Jan 2009

A Test Battery Approach To The Ecotoxicological Evaluation Of Cadmium And Copper Employing A Battery Of Marine Bioassays, Ailbhe Macken, Michelle Giltrap, Kim Ryall, Barry Foley, Evin Mcgovern, Brendan Mchugh, Maria Davoren

Articles

The main aim of this study was to investigate the sensitivity of the battery to two recognised metal pollutants of the marine environment and rank species sensitivity accordingly.

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Comment On "On The Theory Of Nuclear Resonant Forward Scattering Of Synchrotron Radiation", Gilbert R. Hoy, Jos Odeurs Jan 2009

Comment On "On The Theory Of Nuclear Resonant Forward Scattering Of Synchrotron Radiation", Gilbert R. Hoy, Jos Odeurs

Physics Faculty Publications

Recently, in a paper by Kohn and Smirnov, a formula previously derived by Kagan et al. was developed to explain the forward scattering of gamma radiation by a nuclear-resonant sample excited by pulsed synchrotron radiation. Their derivation followed, directly, a procedure developed by Heitler, Harris, and Hoy. Previously, a completely different formula was developed by Hoy et al. to explain the same process. As a result, Kohn and Smirnov discuss the correctness and validity of the two models. In this Comment a detailed numerical comparison of the two theories has also been made. It is shown that their comparison is …

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Geochemical Characteristics Of Mafic And Intermediate Volcanic Rocks From The Hasandağ And Erciyes Volcanoes (Central Anatolia, Turkey), Aykut Güçteki̇n, Nezi̇hi̇ Köprübaşi Jan 2009

Geochemical Characteristics Of Mafic And Intermediate Volcanic Rocks From The Hasandağ And Erciyes Volcanoes (Central Anatolia, Turkey), Aykut Güçteki̇n, Nezi̇hi̇ Köprübaşi

Turkish Journal of Earth Sciences

Hasandağ and Erciyes stratovolcanoes, which are the two important stratovolcanoes in Central Anatolia, erupted volcanic products with both calc-alkaline and alkaline compositions, although the calc-alkaline activity is more widespread. There are three stages of geochemical evolution in the history of the Hasandağ stratovolcanic complex: (1) Keçikalesi tholeiitic volcanism, (2) Hasandağ calc-alkaline volcanism, and (3) Hasandağ alkaline volcanism. The geochemical evolution of Erciyes volcanic complex also exhibits three distinct evolutionary stages: (1) Koçdağ alkaline volcanism, (2) Koçdağ calc-alkaline volcanism and (3) Erciyes calc-alkaline volcanism. The volcanic rocks from both suites show enrichments in LREE relative to HREE. The rocks as a …

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Anomalous Strong Reflections On High Resolution Seismic Data From The Turkish Shelf Of The Eastern Black Sea: Possible Indicators Of Shallow Hydrogen Sulphide-Rich Gas Hydrate Layers, Derman Dondurur, Günay Çi̇fçi̇ Jan 2009

Anomalous Strong Reflections On High Resolution Seismic Data From The Turkish Shelf Of The Eastern Black Sea: Possible Indicators Of Shallow Hydrogen Sulphide-Rich Gas Hydrate Layers, Derman Dondurur, Günay Çi̇fçi̇

Turkish Journal of Earth Sciences

Some strong reflections about 3 to 5 m thick were observed at depths of 25-60 metres below the sea floor using deep-towed, 5 kHz subbottom profiler data in the Turkish shelf and upper slope of the Eastern Black Sea at water depths of 250 to 700 m. Strong reflections of this kind are generally attributed to shallow and localized gas accumulations. We, however, observed that the reflection polarity of these strong reflections was positive, suggesting that they do not correspond to reflections from the upper boundary of a possible gas front. In this study, we evaluate these reflections to determine …

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Benthic Faunal Assemblages Of The Holocene Sediments From The Southwest Black Sea Shelf, Demet Ongan, Oya Algan, Sevi̇nç Kapan Yeşi̇lyurt, Ati̇ke Nazi̇k, Mustafa Ergi̇n, Christ Eastoe Jan 2009

Benthic Faunal Assemblages Of The Holocene Sediments From The Southwest Black Sea Shelf, Demet Ongan, Oya Algan, Sevi̇nç Kapan Yeşi̇lyurt, Ati̇ke Nazi̇k, Mustafa Ergi̇n, Christ Eastoe

Turkish Journal of Earth Sciences

Benthic faunal content (benthic foraminifera, mollusca and ostracoda) of sediment cores from the SW Black Sea shelf were examined. Based on the vertical distribution of abundance and diversity of the benthic fauna, three benthic assemblages were distinguished. These assemblages are BF1, BF2 and BF3, and reflect the changes in bottom water from the termination of the Neoeuxinian period to present. BF1 displays high abundance and diversity in the surroundings of the Bosporus channel, diminishing in the shelf sediments further away from the channel. In the Mid-Shelf and Outer Shelf, it displays low abundance and low diversity. BF1 which started to …

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Bedrock Depth Mapping Of The Coast South Of İstanbul: Comparison Of Analytical And Experimental Analyses, Gülüm Bi̇rgören, Oğuz Özel, Bi̇lge Si̇yahi̇ Jan 2009

Bedrock Depth Mapping Of The Coast South Of İstanbul: Comparison Of Analytical And Experimental Analyses, Gülüm Bi̇rgören, Oğuz Özel, Bi̇lge Si̇yahi̇

Turkish Journal of Earth Sciences

Local S-wave velocity-depth profiles and bedrock depth distribution are key factors in assessing seismic hazard and earthquake ground motion characteristics since they allow determination of the amplification potential of geological formations overlying bedrock. In this study, an empirical relationship between the thickness of Tertiary-Quaternary sediments (hereafter referred as cover) overlying Palaeozoic bedrock and their resonance frequencies was calculated for the İstanbul region and the bedrock depth distribution beneath the city was presented. The relationship was investigated by comparing transfer functions obtained from single station microtremor analyses and one-dimensional (1D) S-wave velocity profiles at sites where shallow velocity structure is known. …

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Cross-Basin Faulting And Extinction Of Pull-Apart Basins In The Sea Of Marmara, Nw Turkey, İsmai̇l Kuşçu Jan 2009

Cross-Basin Faulting And Extinction Of Pull-Apart Basins In The Sea Of Marmara, Nw Turkey, İsmai̇l Kuşçu

Turkish Journal of Earth Sciences

Although offshore multi-channel seismic reflection and multi-beam bathymetric studies were intensively carried out in the Sea of Marmara especially after the August 17, 1999 İzmit earthquake (Mw 7.4), some basic problems remain unsolved, for example whether the seafloor was cut by a double fault system or just by a single fault. The researchers advocating the double fault system assumed that most of the deformation occurred along the margins of the basins and concluded that the classical model of pull-apart basin formation along releasing bends or stepovers within an east−west-trending dextral strike-slip system prevails. An alternative and completely different proposition proposed …

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Empirical Attenuation Relationships For Western Anatolia, Turkey, Ni̇hal Akyol, Özlem Karagöz Jan 2009

Empirical Attenuation Relationships For Western Anatolia, Turkey, Ni̇hal Akyol, Özlem Karagöz

Turkish Journal of Earth Sciences

Seismic hazard studies have become progressively more important for earthquake engineering applications in western Anatolia, which contains one of the world’s best examples of a rapidly extending intra-continental tectonic regime. A two-stage regression analysis was applied to peak ground acceleration and 5%-damped spectral acceleration values of 168 recordings from 49 earthquakes in order to develop empirical attenuation relationships which can be used to predict ground motion for western Anatolia. Moment magnitudes for earthquakes range between 4.0 and 6.4 while the hypocentral distances range between 15 and 200 km in our dataset. Site classifications, as one of the predictor variables for …

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Permian Trilobites From Antalya Province, Turkey, And Enrollment In Late Palaeozoic Trilobites, Rudy Lerosey Aubril, Lucia Angiolini Jan 2009

Permian Trilobites From Antalya Province, Turkey, And Enrollment In Late Palaeozoic Trilobites, Rudy Lerosey Aubril, Lucia Angiolini

Turkish Journal of Earth Sciences

Trilobites are a minor component of Permian benthic marine faunas, which explains why they remain poorly known. For example, only two specimens have been found in the highly fossiliferous and extensively studied Middle-Upper Permian Pamucak Formation (Antalya Province, Turkey). These two complete enrolled trilobites of Wordian age are described herein. The diagnosis of the subgenus Pseudophillipsia (Nodiphillipsia) Kobayashi & Hamada 1984a is emended and its occurrence outside of eastern Asia is reported for the first time. The second specimen represents a new species, Pseudophillipsia (Carniphillipsia) kemerensis sp. nov. Its discovery in the Wordian of Turkey suggests that Pseudophillipsia (Carniphillipsia) is …

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Benthonic Foraminiferal Biostratigraphy Of The Upper Cretaceous (Middle Cenomanian−Coniacian) Sequences Of The Bey Dağları Carbonate Platform, Western Taurides, Turkey, Bi̇lal Sari, Kemal Tasli, Saci̇t Özer Jan 2009

Benthonic Foraminiferal Biostratigraphy Of The Upper Cretaceous (Middle Cenomanian−Coniacian) Sequences Of The Bey Dağları Carbonate Platform, Western Taurides, Turkey, Bi̇lal Sari, Kemal Tasli, Saci̇t Özer

Turkish Journal of Earth Sciences

Identification of the benthonic foraminiferal assemblages from ten stratigraphic sections from the inner platform limestones of the Middle Cenomanian−Coniacian successions of the Bey Dağları carbonate platform (BDCP) allowed the recognition of one biozone and two subzones. The lower part of the platform limestones (Middle−Upper Cenomanian) is represented by relatively rich benthonic foraminiferal assemblages, while the upper part (Turonian−Coniacian) contains poor assemblages. The benthonic foraminiferal assemblages determined in the BDCP are dominated by long-ranging species. The shorter-ranging, stratigraphical index species have been selected to date the Upper Cretaceous platform limestones of the BDCP based on the distributions of the species in …

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