A5012238384- Botany, Ecology, and Taxonomy Studies
- Geology and Paleoclimatology Research
- Archaeology and Natural History
- Geological formations and processes
- Geological Modeling and Analysis
- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- Geological Studies and Exploration
- Paleontology and Stratigraphy of Fossils
- Hydrocarbon exploration and reservoir analysis
- Plant Diversity and Evolution
- earthquake and tectonic studies
- Landslides and related hazards
- Water Quality and Resources Studies
- Coal and Its By-products
- Ecology and Vegetation Dynamics Studies
- Geotechnical and Geomechanical Engineering
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Coal Properties and Utilization
- Plant and Fungal Species Descriptions
- Geological and Geophysical Studies Worldwide
- Evolution and Paleontology Studies
- Peatlands and Wetlands Ecology
- Planetary Science and Exploration
Texas A&M University
2011-2024
United States Geological Survey
2011-2023
Illinois Archaeological Survey
2011-2023
University of Illinois Urbana-Champaign
1996-2022
University of Colorado Boulder
2020
Laboratory for Atmospheric and Space Physics
2020
West Virginia University
1979
Research Article| October 01, 2009 Incised channel fills containing conifers indicate that seasonally dry vegetation dominated Pennsylvanian tropical lowlands Howard J. Falcon-Lang; Falcon-Lang * 1Department of Earth Sciences, Royal Holloway, University London, Egham, Surrey TW20 0EX, UK *E-mail: h.falcon-lang@es.rhul.ac.uk. Search for other works by this author on: GSW Google Scholar W. John Nelson; Nelson 2Illinois State Geological Survey, Champaign, Illinois 61820, USA Scott Elrick;...
Early Permian (late Leonardian Series) plant assemblages from King, Knox, and Stonewall Counties of North-Central Texas are dominated by seed plants, some apparently congeneric with taxa heretofore known only the Late or Mesozoic. Conifers dominant elements, including one more species Ullmannia, Pseudovoltzia liebeana, both Zechstein flora Germany England, Podozamites sp., characteristic Mesozoic, Walchia abundant in floras. Locally common Taeniopteris cf. eckardtii, a species, an...
Research Article| May 01, 2007 Ecological gradients within a Pennsylvanian mire forest William A. DiMichele; DiMichele 1Department of Paleobiology, National Museum Natural History (NMNH) Smithsonian Institution, Washington, DC 20560, USA Search for other works by this author on: GSW Google Scholar Howard J. Falcon-Lang; Falcon-Lang 2Department Earth Sciences, University Bristol, Bristol BS8 1RJ, UK W. John Nelson; Nelson 3lllinois State Geological Survey, Champaign, Illinois 61820, Scott D....
Abstract The morphology, mineralogy, and stratigraphic lateral distribution of paleosols in Pennsylvanian (Moscovian–Gzhelian; Atokan–Virgilian) mixed marine terrestrial coal-bearing strata (i.e., cyclothems) the Illinois basin (IB) are presented order to determine dominant pedogenic processes within a cyclic sedimentary depositional framework. Paleosol morphologies range from weakly developed horizons with evidence rooting little no structure, well-developed slickensides, angular blocky...
Research Article| April 01, 2011 Pennsylvanian coniferopsid forests in sabkha facies reveal the nature of seasonal tropical biome Howard J. Falcon-Lang; Falcon-Lang * 1Department Earth Sciences, Royal Holloway, University London, Surrey TW20 0EX, UK *E-mail: h.falcon-lang@es.rhul.ac.uk. Search for other works by this author on: GSW Google Scholar Nathan A. Jud; Jud 2University Maryland College Park, 20742, USA W. John Nelson; Nelson 3Illinois State Geological Survey, Champaign, Illinois...
A new Middle Permian plant assemblage from South Ash Pasture in King County, Texas, may be the youngest and is certainly most unusual flora known of either West Texas or adjoining north-central Texas. Found serendipitously evaporite-rich upper Blaine Formation (Pease River Group, Guadalupian Series), very low diversity despite intensive collecting efforts, affinities nearly all taxa are enigmatic. The common elements parallel-veined leaves that resemble cordaites but could isolated pinnules...
Abstract Distinct lateral and stratigraphic trends in paleosol morphology clay mineralogy, conjunction with the stable-isotope composition of sub-millimeter-scale spherulitic siderite (sphaerosiderite) flint-clay kaolinite middle–upper Pennsylvanian cyclic coal-bearing strata Illinois basin (IB) presented herein provide proxy records middle–late equatorial terrestrial environments. Collectively, these data a better understanding polygenetic history ancient soils preserved indicate that...
Abstract A macrofloral assemblage dominated by elements of the Euramerican dryland biome is described from Brazil Formation in Clay County, Indiana (Illinois Basin). Fossils were recovered a thin heterolithic unit between shallow-marine bed and paleosol beneath Minshall Coal, Middle Pennsylvanian succession deposited near Atokan-Desmoinesian Bolsovian-Asturian boundaries. Sedimentological indicators imply accumulation under seasonal climate, including interbedded siltstone sandstone during...
Energy consumption in buildings is a significant cost to the building’s operation. As faults are introduced system, building energy may increase and cause loss occupant productivity due poor thermal comfort. Research towards automated fault detection diagnostics has accelerated recent history. Rule-based methods have been developed for decades great success, but advances computing power opened new doors more complex processing techniques which could be used accurate results. Popular machine...
ABSTRACT Uncertainty persists over whether repetitive stratal rhythms in the Pennsylvanian of Euramerica (so-called “cyclothems”) were externally forced, all likelihood by waxing and waning glacial ice centers on Gondwana, or controlled autogenic processes. A key to resolving this dispute is lateral extent individual cyclothems, with broad regional (beyond plausible breadth length depositional systems such as deltas) arguing favor an external forcing control. This study provides a...
Abstract Taxonomic analysis is provided for a Middle Pennsylvanian macrofloral assemblage collected from clastic wetland deposits in Clay County, Indiana, on the eastern margin of Illinois Basin. Adpressed plant fossils were recovered four distinct beds lowermost Staunton Formation, positioned above Minshall Coal (uppermost Brazil Formation), part succession deposited near Atokan-Desmoinesian boundary. The 22 fossil-taxa dominated by pteridosperms (including Neuropteris flexuosa ,...
Six late Atokan (early Asturian) floras from seasonally dry environments are described and quantitatively analysed adpressions palynomorphs. Collections the eastern margin of Illinois Basin, USA, in an 80 km N-S transect. Plant fossils occur sedimentary rocks below underclay (paleosol) Minshall-Buffaloville Coal Member (thus, not “roof-shale” assemblages), uppermost Brazil Formation. Growth under season dryness is indicated by outcrop lithological features that suggest deposition flashy...
Abstract A threshold-like vegetational change in tropical wetlands occurred the early Kasimovian (the US Desmoinesian–Missourian boundary) – Event 3. Two earlier significant changes occurred, first mid-Moscovian (Atokan–Desmoinesian; ∼Bolsovian–Asturian) 1, and second late Moscovian (mid-Desmoinesian; mid-Asturian) 2. These during a time period of dynamic complex physical Euramerican Pangaea driven by polar ice volume accompanying sea level, atmospheric circulation, rainfall, temperature....