Liberal Arts Research Commons

Implications of the loess record for Holocene climate and human settlement in Heye Catchment, Jiuzhaigou, eastern Tibetan Plateau, Sichuan, China, Amanda C. Henck Schmidt, Brian D. Collins, Amanda Keen-Zebert, Jade D'Alpoim Guedes, Anke Hein, Andrew Womack, Casey McGuire, James Feathers, Lyman Persico, Dominic Fiallo, Ya Tang, Bruce M. Simonson
Faculty & Staff Scholarship

Archean Asteroid Impacts on Earth: Stratigraphic and Isotopic Age Correlations and Environmental Consequences, Alexandra E. Krull-Davatzes, Steven Goderis, Bruce M. Simonson
Faculty & Staff Scholarship

Raman Microspectroscopic Mapping with Multivariate Curve Resolution–Alternating Least Squares (MCR-ALS) Applied to the High-Pressure Polymorph of Titanium Dioxide, TiO 2 -II, Joseph P. Smith, Frank C. Smith, Joshua Ottaway, Alexandra E. Krull-Davatzes, Bruce M. Simonson, Billy P. Glass, Karl S. Booksh
Faculty & Staff Scholarship

Shock-metamorphosed rutile grains containing the high-pressure polymorph TiO2-II in four Neoarchean spherule layers, Frank C. Smith, Billy P. Glass, Bruce M. Simonson, Joseph P. Smith, Alexandra E. Krull-Davatzes, Karl S. Booksh
Faculty & Staff Scholarship

Spherule layers, crater scaling laws, and the population of ancient terrestrial impactors, Brandon C. Johnson, Gareth S. Collins, David A. Minton, Timothy J. Bowling, Bruce M. Simonson, Maria T. Zuber
Faculty & Staff Scholarship

Review: Landscapes and Landforms of South Africa, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Geology and resource potential of the Congo Basin, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Four revolutions in the earth sciences: from heresy to truth, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Introducing the planets and their moons, Bruce M. Simonson
Faculty & Staff Scholarship

First detection of extraterrestrial material in ca. 2.49 Ga impact spherule layer in Kuruman Iron Formation, South Africa, Bruce M. Simonson, Steven Goderis, Nicolas J. Beukes
Faculty & Staff Scholarship

Review: Planetary Geology: an Introduction, Bruce M. Simonson
Faculty & Staff Scholarship

Review: The Earth as Cradle for Life: The Origin, Evolution and Future of the Environment, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Dune Worlds: How Windblown Sand Shapes Planetary Landscapes, Bruce M. Simonson
Faculty & Staff Scholarship

Distal Impact Ejecta Layers: A Record of Large Impacts in Sedimentary Deposits, Billy P. Glass, Bruce M. Simonson
Faculty & Staff Scholarship

Ni-rich spinels and platinum group element nuggets condensed from a Late Archaean impact vapour cloud, Steven Goderis, Bruce M. Simonson, Iain McDonald, Scott W. Hassler, Andrei Izmer, Joke Belza, Herman Terryn, Frank Vanhaecke, Philippe Claeys
Faculty & Staff Scholarship

Review: Working on Mars: Voyages of Scientific Discovery with the Mars Exploration Rovers, Bruce M. Simonson
Faculty & Staff Scholarship

Review: How to Build a Habitable Planet: the Story of Earth from the Big Bang to Humankind, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Lunar Domes: Properties and Formation Processes, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Impact Cratering: Processes and Products, Bruce M. Simonson
Faculty & Staff Scholarship

Faculty Picks: 5 Best Books on Water Resource Management, Bruce M. Simonson
Faculty & Staff Scholarship

Application of laser ablation-ICP-mass spectrometry for 2-dimensional mapping of element distributions in a Late Archean impact spherule layer, Andrei Izmer, Steven Goderis, Bruce M. Simonson, Iain McDonald, Scott W. Hassler, Philippe Claeys, Frank Vanhaecke
Faculty & Staff Scholarship

Ion microprobe analyses of δ18O in early quartz cements from 1.9Ga granular iron formations (GIFs): A pilot study, Lauren C. Cunningham, F. Zeb Page, Bruce M. Simonson, Reinhard Kozdon, John W. Valley
Faculty & Staff Scholarship

An Archaean heavy bombardment from a destabilized extension of the asteroid belt, William F. Bottke, David Vokrouhlický, David A. Minton, David Nesvorný, Alessandro Morbidelli, Ramon Brasser, Bruce M. Simonson, Harold F. Levison
Faculty & Staff Scholarship

Distal Impact Ejecta Layers: Spherules and More, Billy P. Glass, Bruce M. Simonson
Faculty & Staff Scholarship

Variation In Distal Impact Ejecta With Distance From The Source Crater: A Model, Billy P. Glass, Bruce M. Simonson
Faculty & Staff Scholarship

Laser Ablation Mapping Of Siderophile Elements In The Late Archaean Reivilo Impact Spherule Layer, South Africa (abstract), Iain McDonald, Bruce M. Simonson, Christian Koeberl, Wolf Uwe Reimold
Faculty & Staff Scholarship

Paraburdoo Spherule Layer (Hamersley Basin, Western Australia): Distal Ejecta From A Fourth Large Impact Near The Archean-proterozoic Boundary, Scott W. Hassler, Bruce M. Simonson, Dawn Y. Sumner, Louis Bodin
Faculty & Staff Scholarship

Iron Ore Deposits Associated With Precambrian Iron Formations, Bruce M. Simonson
Faculty & Staff Scholarship

On Proterozoic ecosystems and the carbon isotopic composition of carbonates associated with Banded Iron Formations, A. E. Fallick, V. A. Melezhik, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Water in the Universe, Bruce M. Simonson
Faculty & Staff Scholarship

Discovery Of A Shock-induced Polymorph Of Rutile With Alpha-pbo2 Structure (tio2ii) In Four Neoarchean Spherule Layers From Western Australia And South Africa, Frank C. Smith, J. B. Zullo, Billy P. Glass, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Megaflooding on Earth and Mars, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Planetary Tectonics, Bruce M. Simonson
Faculty & Staff Scholarship

Authigenic minerals in macropores and veins in Late Triassic mudstones of the Newark Basin: implications for fluid migration through mudstonen, Bruce M. Simonson, Joseph Smoot, Jennifer L. Hughes
Faculty & Staff Scholarship

Geochemistry of 2.63-2.49Ga impact spherule layers and implications for stratigraphic correlations and impact processes, Bruce M. Simonson, Iain McDonald, Alex Shukolyukov, Christian Koeberl, Wolf Uwe Reimold, Günter W. Lugmair
Faculty & Staff Scholarship

Review: Planetary Crusts: Their Composition, Origin and Evolution, Bruce M. Simonson
Faculty & Staff Scholarship

Correlating multiple Neoarchean–Paleoproterozoic impact spherule layers between South Africa and Western Australia, Bruce M. Simonson, Dawn Y. Sumner, Nicolas J. Beukes, S. Johnson, J. Gutzmer
Faculty & Staff Scholarship

Review: Early Life on Earth: A Practical Guide, Bruce M. Simonson
Faculty & Staff Scholarship

Banded iron formations and the early atmosphere, Bruce M. Simonson, A. J. Kaufman
Faculty & Staff Scholarship

Review: Unmasking Europa: The Search for Life on Jupiter's Ocean Moon, Bruce M. Simonson
Faculty & Staff Scholarship

Textural constraints on the formation of impact spherules: A case study from the Dales Gorge BIF, Paleoproterozoic Hamersley Group of Western Australia, Dawn Sweeney, Bruce M. Simonson
Faculty & Staff Scholarship

Secular change in the Precambrian silica cycle: Insights from chert petrology, Robert G. Maliva, Andrew H. Knoll, Bruce M. Simonson
Faculty & Staff Scholarship

The GSA Committee on Research Grants, Bruce M. Simonson
Faculty & Staff Scholarship

The ancient anoxic biosphere was not as we know it, A. E. Fallick, V. A. Melezhik, Bruce M. Simonson
Faculty & Staff Scholarship

Geology of Vermilion Watershed, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Our Changing Planet: The View from Space, Bruce M. Simonson
Faculty & Staff Scholarship

Roy W. Simonson: A Century as a Soil Scientist, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Ogallala Blue: Water and Life on the High Plains, Bruce M. Simonson
Faculty & Staff Scholarship

Review: Big Coal: The Dirty Secret Behind America's Energy Future, Bruce M. Simonson
Faculty & Staff Scholarship

Sedimentology and geochemistry of extensive very coarse deepwater submarine fan sediments in the Middle Jurassic of Oman, emplaced by giant tsunami triggered by submarine mass flows, M.E. Brookfield, I. Blechschmidt, R. Hannigan, M. Coniglio, Bruce M. Simonson, G. Wilson
Faculty & Staff Scholarship

Using impact spherule layers to correlate sedimentary successions: a case study of the Neoarchean Jeerinah layer (Western Australia), Sarah Jones-Zimberlin, Bruce M. Simonson, David Kreiss-Tomkins, Daniel Garson
Faculty & Staff Scholarship

Diagenetic alteration of impact spherules in the Neoarchean Monteville layer, South Africa, Issaku Kohl, Bruce M. Simonson, Melissa Berke
Faculty & Staff Scholarship

Spherule textures in the Neoarchaean Wittenoom impact layer, Western Australia: consistency in diversity, A. Scally, Bruce M. Simonson
Faculty & Staff Scholarship

Neoarchaean impact spherule layers in the Fortescue and Hamersley Groups, Western Australia: stratigraphic and depositional implications of re-correlation, Scott W. Hassler, Bruce M. Simonson, Dawn Y. Sumner, M. Murphy
Faculty & Staff Scholarship

Spherule layers—records of ancient impacts, Bruce M. Simonson, Billy P. Glass
Faculty & Staff Scholarship

New evidence for a large Palaeoproterozoic impact: spherules in a dolomite layer in the Ketilidian orogen, South Greenland, Brian Chadwick, Philippe Claeys, Bruce M. Simonson
Faculty & Staff Scholarship

The sedimentary record of extraterrestrial impacts in deep-shelf environments: Evidence from the early Precambrian, Scott W. Hassler, Bruce M. Simonson
Faculty & Staff Scholarship

Geochemical evidence for an impact origin for a Late Archean spherule layer, Transvaal Supergroup, South Africa, Bruce M. Simonson, Christian Koeberl, Iain McDonald, Wolf Uwe Reimold
Faculty & Staff Scholarship

Bedforms produced by impact-generated tsunami, ~2.6Ga Hamersley basin, Western Australia, Scott W. Hassler, H. F. Robey, Bruce M. Simonson
Faculty & Staff Scholarship

Discovery of a layer of probable impact melt spherules in the Late Archaean Jeerinah Formation, Fortescue Group, Western Australia, Bruce M. Simonson, D. Davies, Scott W. Hassler
Faculty & Staff Scholarship

Have distal impact ejecta changed through geologic time?, Bruce M. Simonson, Paul Harnik
Faculty & Staff Scholarship

Roll-up structures: Evidence of in situ microbial mats in late Archean deep shelf environments, Bruce M. Simonson, K. E. Carney
Faculty & Staff Scholarship

Iridium anomaly but no shocked quartz from Late Archean microkrystite layer: Oceanic impact ejecta?, Bruce M. Simonson, Darian Davies, Malcolm Wallace, Shane Reeves, Scott W. Hassler
Faculty & Staff Scholarship

Isotopic dating of an Archean bolide impact horizon, Hamersley basin, Western Australia, Jon D. Woodhead, Janet M. Hergt, Bruce M. Simonson
Faculty & Staff Scholarship

Revised correlations in the early Precambrian Hamersley Basin based on a horizon of resedimented impact spherules, Bruce M. Simonson, Scott W. Hassler
Faculty & Staff Scholarship

Was the deposition of large Precambrian iron formations linked to major marine transgressions?, Bruce M. Simonson, Scott W. Hassler
Faculty & Staff Scholarship

Carbonate Pb-Pb ages of the Wittenoom Formation and Carawine Dolomite, Hamersley Basin, Western Australia (with implications for their correlation with the Transvaal Dolomite of South Africa), Bor-ming Jahn, Bruce M. Simonson
Faculty & Staff Scholarship

Carbonate sedimentology of the early Precambrian Hamersley Group of Western Australia, Bruce M. Simonson, Kathryn A. Schubel, Scott W. Hassler
Faculty & Staff Scholarship

Geological evidence for a strewn field of impact spherules in the early Precambrian Hamersley Basin of Western Australia, Bruce M. Simonson
Faculty & Staff Scholarship

Petrography and diagenesis of cherts from Lake Magadi, Kenya, Kathryn A. Schubel, Bruce M. Simonson
Faculty & Staff Scholarship

First discovery of ferruginous chert arenites in the early Precambrian Hamersley Group of Western Australia, Bruce M. Simonson, A. D.T. Goode
Faculty & Staff Scholarship

Deposition and alteration of volcaniclastic strata in two large, early Proterozoic iron-formations in Canada, Scott W. Hassler, Bruce M. Simonson
Faculty & Staff Scholarship

Early silica cementation and subsequent diagenesis in arenites from four early Proterozoic iron formations of North America, Bruce M. Simonson
Faculty & Staff Scholarship

Sedimentological constraints on the origins of Precambrian iron-formations, Bruce M. Simonson
Faculty & Staff Scholarship

Sedimentology of cherts in the Early Proterozoic Wishart Formation, Quebec–Newfoundland, Canada, Bruce M. Simonson
Faculty & Staff Scholarship

Early Proterozoic microfossils and penecontemporaneous quartz cementation in the Sokoman Iron Formation, Canada, Andrew H. Knoll, Bruce M. Simonson
Faculty & Staff Scholarship