The Illinois Basin Carbon Ore, Rare Earth, and Critical Mineral Initiative (Ib Core-CM)
Geological Society of America Abstracts with Programs
Coal Industry in Illinois: 2008 Revision
Visualizing Ecological Data in Pennsylvanian Coal Balls Using Computer Tomography (CT)
Geological Society of America Abstracts with Programs, 2021
Back to the forest
Illinois Audubon Magazine, 2014
Vegetational patterns across the Pennsylvanian-Permian boundary in western equatorial Pangaea, a contrast with the Dunkard; Geological Society of America, Northeastern Section, 46th annual meeting; Geological Society of America, North-Central Section, 45th annual meeting
Facies relationships of the Middle Pennsylvanian Springfield Coal and Dykersburg Shale; constraints on sedimentation, development of coal splits and climate change during transgression; Geological Society of America, North-Central Section, 44th annual meeting and Geological Society of America, So...
Paleoclimate and the origin of two 1000 km Lower Mississippian facies tracts in southeastern Laurentia (USA): Cool-humid Famennian and Kinderhookian – warm-arid Osagean
Palaeogeography, Palaeoclimatology, Palaeoecology
Vegetational change during the Middle–Late Pennsylvanian transition in western Pangaea
Geological Society, London, Special Publications
We present the first analysis of vegetational change in far western equatorial Pangaea (New Mexic... more We present the first analysis of vegetational change in far western equatorial Pangaea (New Mexico, USA) during the Middle–Late Pennsylvanian transition (determined by conodonts and fusulinids) of the Late Paleozoic Ice Age. The study is based on the largest database assembled from this region: 28 of 44 quantitatively analysed floras from 14 of 26 stratigraphic levels. Most sampled floras are ‘mixed’, both below and above the boundary, including both hygromorphic and mesomorphic/xeromorphic taxa. The taxonomic data were recalibrated morphometrically focusing on foliar traits of lamina width and venation. All data were examined using stratigraphic credible intervals, capture–mark–recapture analyses, and resampling analyses. Results indicate no substantive taxonomic turnover across the boundary. This stands in marked contrast to patterns in mid-Pangaean coal basins where there is a large wetland vegetational turnover. However, plant and physical geological data indicate that immediate...
The Cantabrian Substage should be abandoned: revised chronostratigraphy of the Middle–Late Pennsylvanian boundary
Geological Society, London, Special Publications
In spite of numerous revisions from 1966 to present, the Cantabrian Substage of the Stephanian St... more In spite of numerous revisions from 1966 to present, the Cantabrian Substage of the Stephanian Stage (Pennsylvanian) was never properly defined as a chronostratigraphic unit. Defined and redefined at least three times, the Cantabrian lacks boundary stratotypes that correspond to clear and correlateable biochronological signals. Thus, instead of using a biochronological datum of well-established validity and utility, Cantabrian advocates have relied on ill-defined macrofloral assemblage zones and on lithostratigraphic boundaries to define the substage. As a result, the Cantabrian is demonstrably diachronous, even within Europe; indeed, the Cantabrian has proven to be unusable for correlations outside its type area in northern Spain. To resolve these problems, we recommend that the Cantabrian Substage be abandoned, and the Westphalian–Stephanian boundary be redefined at the major floral turnover that has been documented in the USA, western and central Europe, and in the Donets Basin. ...
Kasimovian floristic change in tropical wetlands and the Middle–Late Pennsylvanian Boundary Event
Geological Society, London, Special Publications
A threshold-like vegetational change in tropical wetlands occurred in the early Kasimovian (the U... more A threshold-like vegetational change in tropical wetlands occurred in the early Kasimovian (the US Desmoinesian–Missourian boundary) – Event 3. Two earlier significant changes occurred, first in the mid-Moscovian (Atokan–Desmoinesian; ∼Bolsovian–Asturian) – Event 1, and the second in the late Moscovian (mid-Desmoinesian; mid-Asturian) – Event 2. These changes occurred during a time period of dynamic and complex physical change in Euramerican Pangaea driven by changes in polar ice volume and accompanying changes in sea level, atmospheric circulation, rainfall, and temperature. During the Event 3 change, hyperbolized as ‘the Carboniferous rainforest collapse’, lycopsid dominance of (mostly peat) swamps changed to marattialean tree-fern and medullosan pteridosperm dominance, and biodiversity decreased. Event 3 encompassed one glacial–interglacial cycle and included vegetational turnover in other wetland habitats. For several subsequent glacial–interglacial cycles peatland dominance var...
Pre-meeting Road Log: Little San Pascual Mountains
Socorro Region III
Permian outliers in western Kentucky; Geological Society of America, Northeastern Section, 46th annual meeting; Geological Society of America, North-Central Section, 45th annual meeting
Geological Society of America, 2011
New correlations in Raccoon Creek Group (Atokan and lower Desmoinesian) of Indiana and southern Illinois
Geological Society of America, 2014
Weathering profiles in the Intensively-Managed Landscape Critical Zone Observatory, Illinois and Iowa (Appendix 9)
Age and paleo-environmental significance of upper Paleozoic ostracodes from the Appalachian and eastern Illinois Basins
This paper was compiled during November 2008. It was a research project that sought out the persp... more This paper was compiled during November 2008. It was a research project that sought out the perspectives of various diverse musicians in Samoa at that time. These musicians included music school instructors, Peace Corps volunteers, Samoan orchestra composers and conductors, traditional Samoan composers, traveled Samoan musicians as well as contemporary Samoan artists. The paper examines how the purposes of music in Samoan society have shifted, altered or changed from traditional times to current‐day Samoa in the face of development, a growing economy and increased contact with outside influences. Although the music of Samoa, its purposes, values, uses and aesthetics have changed, there is still a core “traditional” music of Samoa. Traditional Samoan music still has a purpose and a function in today’s society, but has partially given way to contemporary, externally‐influenced Samoan music in the new age of development, greatly for the purpose of entertainment. At this time, Samoa is ...
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