A5039182122- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Hydraulic Fracturing and Reservoir Analysis
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Drilling and Well Engineering
- Paleontology and Evolutionary Biology
- Petroleum Processing and Analysis
- Evolution and Paleontology Studies
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Reservoir Engineering and Simulation Methods
- Astro and Planetary Science
- Pleistocene-Era Hominins and Archaeology
- Seismic Imaging and Inversion Techniques
- CO2 Sequestration and Geologic Interactions
- Geological Modeling and Analysis
- Cambodian History and Society
- Groundwater flow and contamination studies
- Southeast Asian Sociopolitical Studies
- Global Maritime and Colonial Histories
University of North Dakota
2023-2025
Cornell University
2023-2025
Colorado State University
2008-2023
TU Bergakademie Freiberg
2001-2005
Heidelberg University
1999-2003
Technische Universität Berlin
2000
Abstract Black, organic-rich rocks of the upper shale member Upper Devonian–Lower Mississippian Bakken Formation, a world-class petroleum source rock in Williston Basin United States and Canada, contain diverse suite mudstone lithofacies that were deposited distinct facies belts. The succession consists three discrete associations (FAs). These comprise: 1) siliceous mudstones; 2) quartz- carbonate-bearing, laminated 3) macrofossil-debris-bearing massive mudstones. FAs belts reflect proximal...
Conventionally, geologists have regarded mudstones as deposits formed through suspension settling in environments located at the terminus of sediment transport pathways, with sourced from a mix detrital inputs into basin and situ production within basin. However, are sedimentologically enigmatic they characterized by intricate small-scale features. Analysing typical techniques used for coarse grained siliciclastics does disservice to intricacies these deposits. Grains, pores, depositional...
The 720‐m‐thick succession of the Middle Triassic Latemàr Massif (Dolomites, Italy) was used to reconstruct lagoonal facies architecture a small atoll‐like carbonate platform. Facies analysis sediments yields bathymetric interpretation lateral variations, which reflect syndepositional palaeorelief. Based on tracing flooding surfaces, metre‐scale shallowing‐upward cycles are interpreted be allocyclic origin. Short‐term sea‐level changes led subaerial exposure wide parts marginal zone,...
The Lower Mississippian upper shale member of the Bakken Formation in Williston Basin, North Dakota, consists organic-rich, black, siliciclastic mudstones deposited offshore on a low-gradient shelf; 12 fine-grained facies are recognized and grouped into 5 associations (FAs). Very fine-grained, massive to faintly laminated mudstone (FA1) records deposition deepest, calmest parts basin, whereas well-laminated (FA2a); well-laminated, clay-clast–bearing (FA2b); burrow-mottled with shells (FA3);...
The Spence Shale Member of the Langston Formation is a Cambrian (Miaolingian: Wuliuan) Lagerstätte in northeastern Utah and southeastern Idaho. It older than more well-known Wheeler Marjum Lagerstätten from western Utah, Burgess Canada. shares several species with these younger deposits, yet it also contains remarkable number unique species. Because its relatively broad geographical distribution, variety palaeoenvironments taphonomy, fossil composition likelihood recovering weakly...
ABSTRACT Sedimentary cycles recorded in young sediments are often attributed to fluctuations of the Earth's climate on a 10 4 −10 6 ‐year scale which turn is governed by periodic variations solar insolation linked orbital (Milankovitch) parameters. A spectacular example cyclic stratal patterns ancient deposits Middle Triassic Latemar carbonate platform (W Dolomites, N Italy). Based spectral analyses from previous studies, superimposition precession (∼20 ka) and eccentricity (∼100 controlled...
Abstract Milliken’s (2014) classification scheme for fine-grained sediments and sedimentary rocks is an attempt to provide improved that relies on interpreted grain origin replace existing nomenclature schemes based structures, size, composition. Milliken posits terminology confusing therefore proposes new terms, viz. tarl, carl, sarl, define three main types of mudstone categories. We consider the proposed impracticable because there are: (a) ambiguities associated with interpreting origins...
New drill cores from the largest known impact structure in Europe, relict of Siljan meteorite crater, provide new possibilities to reconstruct Early Palaeozoic marine environments and ecosystems, document changes sedimentary facies, sea level palaeoclimate Baltoscandia. The crater is an important target project "Concentric Impact Structures Palaeozoic" within framework "Swedish Deep Drilling Program". Two core sections, Mora 001 Solberga 1, have been analysed. successions these sections...
The graptolite faunal succession of the late Tremadoc to early Arenig in southern Bolivia is established from Cieneguillas and Culpina sections compared with faunas other regions. yields important data for discussion on proposed GSSP at base Tetragraptus approximatus Zone completeness successions eastern North America Scandinavia. Aorograptus victoriae, Kiaerograptus supremus, Araneograptus murrayi, Hunnegraptus copiosus phyllograptoides zones are reviewed associations discussed. supremus...
The graptolitic Early Ordovician succession of the Mount Hunneberg locality, southern Sweden, shows response graptolite faunas to sea-level changes. exposed interval consists intercalated carbonates and shales at base, grading into pure black in its central upper part. This facies trend records a deepening depositional environment due an overall rise. fauna is dominated by nearshore, shallow-marine forms found most layers throughout succession. Deeper-water pandemic species occur only rarely...
Ordovician graptolite faunal compositions between the Laurentia and Baltica margins of Iapetus Ocean differ considerably in upper Darriwilian (Da 3 – Da 4; Middle Ordovician). Detailed investigation a number sections Table Head Goose Tickle groups western Newfoundland Elnes Formation Norway provides important new data for interval from Holmograptus lentus Biozone to Dicellograptus vagus Biozone. The Nicholsonograptus fasciculatus Pterograptus elegans biozones are introduced can be recognized...
The interpretation of the lithofacies and basin evolution early Ordovician southern Bolivia is based on a number sections an E–W transect. Lithostratigraphic units are extremely diachronous only available data graptolite biostratigraphy enabled evolution. newly proposed biozonation includes biozones Rhabdinopora flabelliformis , Adelograptus sp., Araneograptus murrayi Hunnegraptus copiosus Tetragraptus phyllograptoides Expansograptus protobalticus holmi Baltograptus minutus Azygograptus...
Fracture porosity is crucial for storage and production efficiency in fractured tight reservoirs. Geophysical image logs using resistivity measurements have traditionally been used fracture characterization. This study aims to develop a novel, hybrid machine-learning method predict conventional well the Ahnet field, Algeria. Initially, we explored an Artificial Neural Network (ANN) model regression analysis. To overcome limitations of ANN, proposed combining Support Vector Machine (SVM)...
Cruziana ichnospecies have been repeatedly reported to biostratigraphic significance. This study presents a re-evaluation of the arthropod ichnotaxa rugosa Group from bio- and/or lithostratigraphically well-defined Lower Upper Ordovician siliciclastic sections southern and central Bolivia. With exception rouaulti , ichnofaunas contain all members throughout (Arenig Caradoc) successions in The Bolivian material therefore indicates that these ichnofossil assemblages are suitable for...