Physical Sciences and Mathematics Commons^™

Transition From Contraction To Extension In The Northeastern Basin And Range: New Evidence From The Copper Mountains, Nevada, Jeffrey M. Rahl, Allen J. Mcgrew, Kenneth A. Foland

Allen J. McGrew

New mapping, structural analysis, and 40Ar/39Ar dating reveal an unusually well‐constrained history of Late Eocene extension in the Copper Mountains of the northern Basin and Range province. In this area, the northeast‐trending Copper Creek normal fault juxtaposes a distinctive sequence of metacarbonate and granitoid rocks against a footwall of Upper Precambrian to Lower Cambrian quartzite and phyllite. Correlation of the hanging wall with footwall rocks to the northwest provides an approximate piercing point that requires 8–12 km displacement in an ESE direction. This displaced fault slice is itself bounded above by another normal fault (the Meadow Fork Fault), which brings …

Correspondence Of Historic Salinity Fluctuations In Florida Bay, Usa, To Atmospheric Variability And Anthropogenic Changes, Anna Wachnicka, Evelyn Gaiser, Laurel Collins

Evelyn E. Gaiser

Florida Bay is a highly dynamic estuary that exhibits wide natural fluctuations in salinity due to changes in the balance of precipitation, evaporation and freshwater runoff from the mainland. Rapid and large-scale modification of freshwater flow and construction of transportation conduits throughout the Florida Keys during the late nineteenth and twentieth centuries reshaped water circulation and salinity patterns across the ecosystem. In order to determine long-term patterns in salinity variation across the Florida Bay estuary, we used a diatom-based salinity transfer function to infer salinity within 3.27 ppt root mean square error of prediction from diatom assemblages from four ~130 …

Paleogeographic, Paleoceanographic, And Tectonic Controls On Early Late Ordovician Graptolite Diversity Patterns, Daniel Goldman, Shuang-Ye Wu

Daniel Goldman

The Katian Age (early Late Ordovician) was a time of significant decline in marine biodiversity, but whether this decline was a real phenomenon or an artifact of the relatively few studies devoted to this interval requires further research. We examined the pattern of graptolite faunal changes across the boundary between the Climacograptus bicornis and Diplacanthograptus caudatus graptolite zones in North America and on several other continents.

A sharp decline in species diversity occurs in the Appalachian Basin. Scores for normalized diversity dropped from 20 in the C. bicornis Zone to 7 in the D. caudatus Zone. Only 11% of the …

Multispectral Image Analysis Of Glaciers And Glacier Lakes In The Chugach Mountains, Alaska, Jeffrey Kargel, Matthew Beedle, Andrew Bush, Francisco Carreño, Elena Castellanos, Umesh Haritashya, Gregory Leonard, Javier Lillo, Ivan Lopez, Mark Pleasants, Edward Pollock, David Wolfe

Umesh Haritashya

The Chugach Mountains contain the largest nonpolar alpine glaciers in the world and include a wide variety of glacier types: some are land terminating; some calve variously into tidewater, lakes, and rivers; some are heavily debris covered; some are surge-type, whereas others are neither debris covered nor surge type. Nearly all are retreating, thinning, or both, though some rare ones are advancing, and some are thickening at high elevations. To assist the further documentation of changes, we establish an inventory of glaciers in the eastern Chugach Mountains. Several case studies of diverse glacier types showcase remotesensing applications and are used …

Iceland: Extreme Learning In The Land Of Fire And Ice, Jason Polk, Leslie North

Leslie North

WKU Libraries kicked off the spring season of "Far Away Places" with Dr. Jason Polk and Dr. Leslie North, Asstant Professors from the Department of Geography and Geology at WKU, who talked about leading a study abroad group to Iceland in the summer of 2015. WKU Libraries kicks off the spring season of Far Away Places with Jason Polk and Leslie North, Asst. Professors from the Department of Geography and Geology at WKU, who will be talking about leading a study abroad group to Iceland in the summer of 2015. Dr. Polk and Dr. North co-taught this course with faculty …

Jurassic Eolian Oolite On A Paleohigh In The Sundance Sea, Bighorn Basin, Wyoming, Zoran Kilibarda, David Loope

David B. Loope

Aeolian limestones are widespread in the Quaternary record and have been identified in outcrops and cores of late Palaeozoic strata. These rocks have been interpreted as a low latitude signal of glacio-eustatic sea level fluctuations and have not been previously reported from the Mesozoic or from other episodes of earth history generally believed to have been non-glacial. Numerous lenticular bodies of cross-stratified oolite lie near the contact between the lower and upper members of the mudstone-dominated lower Sundance Formation (Middle and Upper Jurassic) in the Bighorn Basin of north-central Wyoming, USA. The lenses, up to 12 m thick, contain sedimentary …

Neotectonics Of Major Faults Based On Strain Analysis And U-Th Dating Of Syntectonic Calcite, R. Weinberger, P. Nuriel, John Craddock

John Craddock

No abstract provided.

Stratigraphic Resolution And Perceptions Of Cycle Architecture: Variations In Meter-Scale Cyclicity In The Type Cincinnatian Series, Arnold Miller, Steve Holland, Benjamin Dattilo, David Meyer

Benjamin F. Dattilo

No abstract provided.

The Curse Of Rafinesquina: Negative Taphonomic Feedback Exerted By Strophomenid Shells On Storm-Buried Lingulids In The Cincinnatian (Katian, Ordovician) Series Of Ohio, Rebecca Freeman, Benjamin Dattilo, Aaron Morse, Michael Blair, Steve Felton, John Pojeta

Benjamin F. Dattilo

Thousands of lingulid brachiopods were found clustered beneath hundreds of individual valves of the strophomenid brachiopod Rafinesquina in the Upper Ordovician of Ohio. This association suggested a relationship between the two brachiopods, but the nature of this relationship was unclear. We utilized serial thin sectioning to examine these brachiopods and to determine the origin of the bed in which they were found. Sedimentary structures, mixed taphonomies, and stratigraphic and paleogeographic setting suggest that the lingulids occupied a hiatal concentration that had previously been reworked, but not significantly transported, by tropical storms. The final burial event was a storm that exhumed …

A Quantitative Paleoecological Approach To High-Resolution Cyclic And Event Stratigraphy: The Upper Ordovician Miamitown Shale In The Type Cincinnatian, Benjamin Dattilo

Benjamin F. Dattilo

No abstract provided.

Provenance Of Quartz Arenites Of The Early Paleozoic Midcontinent Region, Usa, Alexandros Konstantinou, Karl Wirth, Jeffrey Vervoort, David Malone, Cameron Davidson, John Craddock

Karl Wirth

No abstract provided.

Application Of Hydrogeologic Settings In Groundwater Vulnerability Mapping In Lagrange County, Indiana, Solomon Isiorho

S Isiorho

No abstract provided.

Palaeotrophic Reconstruction And Climatic Forcing Of Mega-Lake Eyre In Late Quaternary Central Australia: A Review, Steve Webb

Steve Webb

Extreme Quaternary climatic variation in Australia brought radical environmental changes to various parts of the continent. In this article, I discuss these changes in terms of mega-lake development in Central Australia, and in particular the southern Lake Eyre Basin (SLEB). The formation of these features, together with the fossil record of the region, throws light on the palaeoclimatic and palaeobiological relationships of megafauna and other animal groups, and the trophic development required to support them. Australian continental drying during the late Quaternary has been noted by many workers, but this process was punctuated by strong pluvial episodes of decreasing strength …

Detrital Zircon Provenance Of The Proterozoic Midcontinent Rift, Lake Superior Region, Usa, John Craddock, A Konstantinou, J. Vervoort, K. Wirth, C. Davidson, L. Finley-Blasi, N. Juda, E. Walker

John Craddock

No abstract provided.

Meridional Shifts Of The Atlantic Intertropical Convergence Zone Since The Last Glacial Maximum, J. Arbuszewski, P. Demenocal, C. Cleroux, Louisa Bradtmiller, A. Mix

Louisa I. Bradtmiller

No abstract provided.

Detrital Zircon Provenance Of The Mesoproterozoic Midcontinent Rift, Lake Superior Region, Usa: Journal Of Geology, V. 121, P. 57-73., John Craddock, Alex Konstantinou, Jeffrey Vervoort, Karl Wirth, Cam Davidson, Lee Finley-Blasi, Natalie Juda, Erin Walker

Karl Wirth

No abstract provided.

Interdisciplinary Science Applications To Glacier And Alpine Hazards In Relation To Development And Habitation In The Hindu Kush-Himalaya: Servir Science Team Project., Umesh Haritashya

Umesh Haritashya

National Aeronautics and Space Administration (NASA). Total Amount $999,886. Role: Co-I. Project duration: Aug 2012 – Aug 2016.

Application Of A Cave Inventory System To Stimulate Development Of Management Strategies: The Case Of West-Central Florida, Usa, Leslie North

Leslie North

Quantitative Characterization Of Glacier State And Dynamics In South Asia And Validation In Alaska Using Repeat Aster Multispectral And Terrain Information., Umesh Haritashya

Umesh Haritashya

National Aeronautics and Space Administration (NASA). Total Amount $682,808. Role: Collaborator. Project duration: January 1, 2011 – December 31, 2013.

Collaborative Research: Graptolite Biogeography, Paleo-Gis, And Evolutionary Dynamics Of Early Paleozoic Zooplankton, Daniel Goldman

Daniel Goldman

Funding Agency: National Service Foundation Investigators: Dr. Goldman, SY. Wu Amount: $255,326.00 Number of years: 4 years

A Microwave Digestion Technique For The Extraction Of Fossil Diatoms From Coastal Lake And Swamp Sediments, Jeffrey Parr, Kathryn Taffs, Christopher Lane

Jeffrey Parr

This study provides an introduction to a microwave digestion technique for the extraction of fossil diatoms from sediments. The microwave technique is compared with the standard diatom extraction technique of Battarbee (Diatom analysis. In: Berglund B.E. (ed.), Handbook of Holocene Palaeoecology and Palaeohydrology. John Wiley and Sons) that uses a combination of dilute hydrochloric acid and hydrogen peroxide and the advantages and disadvantages of their use are discussed. The results suggest that the microwave technique is fast, inexpensive and most importantly produces replicable fossil diatom assemblage data. Small samples sizes are used (0.3 g) for the microwave method thus lower …

Interregional Comparison Of Karst Disturbance: West-Central Florida And Southeast Italy, Leslie North

Leslie North

Quantitative Assessment Of Climate-Induced Glacier Fluctuation In The Central Himalaya Utilizing Satellite Images., Umesh Haritashya

Umesh Haritashya

Sustainability, Energy, and Environment Seed Grant. Total Amount $10,000. Role: PI. Project duration: January 1, 2009 – December 31, 2009.

Quantitative Paleobiogeography Unraveling Macroevolutionary Patterns In Fossil Plankton Using Geographic Information Systems (Gis) Software And The New Geobiodiversity Database, Daniel Goldman

Daniel Goldman

Funding agency: UDRI Seed Grant Amount: $7,500.00

Hierarchical Modeling: Biogeochemical Processes And Mechanisms That Drives Clay Nano- And Microfabric Development, Kenneth J. Curry, Richard H. Bennett, Paula J. Smithka, Matthew H. Hulbert

Kenneth J. Curry

Conceptual scientific models of clay and clay fabric development can be constructed profitably by considering chemical and physical systems in terms of an ordered hierarchy. We develop here a hierarchical model of early stages of marine sediment development identifying processes and focusing on mechanisms. While the focus of our model is on mechanisms, the physical aspects of the hierarchy are cast in terms of the scale of structure in which the mechanisms occur. Our primary scale of interest is the nanometer (nanofabric) level of organization of sediment fabric. This level is nested below the micrometer (microfabric) level that includes aggregates …

Evidence Of Four Generations Of Monazite Growth In Proterozoic Migmatites Of The Santa Fe Range, North-Central New Mexico, Dan Heuer

Dan Heuer

No abstract provided.

Refining The Geologic Time Scale: An Integrated Biostratigraphic Approach., Daniel Goldman

Daniel Goldman

Funding agency: Petroleum Research Fund Amount: $50,000.00 Investigator: Dr. Goldman, S.A. Leslie Year: 2005/3 yrs

Refining The Geologic Time Scale:An Integrated Biostratigraphic Approach, Daniel Goldman

Daniel Goldman

Funding agency: UDRI Seed Grant Amount: $9,000.00

International Supplement To Graptolite Macroevolution: Phylogenetic Analysis And Testing Hypotheses Of Directional Change, Daniel Goldman

Daniel Goldman

Funding agency: National Science Foundation Amount: $12,058.00 Year: 2002/2 yrs.

Graptolite Macroevolution: Phylogenetic Analysis And Testing Foundation Hypotheses Of Directional Change, Daniel Goldman

Daniel Goldman

Funding agency: National Science Foundation Amount: $117,107.00 Year: 2001/4 yrs