Structural and geomorphic analyses of the Fila Costeña thrust belt in southwest Costa Rica indicate active thrusting within the inner forearc. The Fila Costeña exposes three major thrust faults that imbricate the late Tertiary...
The discovery of a relatively large and complete ptilodictyid bryozoan colony enabled morphometric analysis of astogenetic change from the colony base to the periphery. This enabled us to test the hypothesis that the relative...
For more information on the published version, visit GeoScienceWorld's Website., Hausrath, Elisabeth M., Alexis K. Navarre-Sitchler, Carl I. Steefel, Susan L. Brantley. "Basalt Weathering Rates on Earth and the Duration of...
Weathering and erosion processes are crucial to Critical Zone (CZ) evolution, landscape formation and availability of natural resources. Although many of these processes take place in the deep CZ (∼10–100 m), direct information...
In this study, we investigate critical zone architecture and seismic anisotropy in Oregon Ridge Park, MD; specifically, the Pond Branch and Baismen Run catchments. Our characterization of critical zone architecture involves...
Reinthaler and others (2019), hereafter Reinthaler 2019, characterize ice extent on 59 volcanoes in Latin America from 1986 to 2015 using Landsat and Sentinel-2 imagery to quantify the impact of climate and eruptions on glacier...
Glaciovolcanic landforms provide global-scale records of paleoenvironmental conditions and yield insights into subglacial eruption processes. Models for the formation of glaciovolcanic ridges, or tindars, are relatively simple,...
Sak, Peter B., Alexis K. Navarre-Sitchler, Christine E. Miller, Christopher C. Daniel, Jerome Gaillardet, Heather L. Buss, Marina I. Lebedeva, and Susan L. Brantley. "Controls on Rind Thickness on Basaltic Andesite Clasts...
Liu, Xuejian, Tieyuan Zhu, and Jorden Hayes. Critical Zone Structure by Elastic Full Waveform Inversion of Seismic Refractions in a Sandstone Catchment, Central Pennsylvania, USA. Journal of Geophysical Research: Solid Earth...
In contrast to water and air, ice is the most dynamic enveloping medium and unique environment for volcanic eruptions. While all three environments influence volcanic activity and eruption products, the cryospheric eruption...
Key, Marcus M., Jr., Tara E. Jones, and Carolyn H. Jett. Dating the Colonial-Era Davis Site (44LA46) in Lancaster County, Virginia. Quarterly Bulletin of the Archeological Society of Virginia 55, no. 1 (2000): 57-80., This...
Key, Marcus M., Jr. and Emily S. Gaskin. Dating the Prehistoric Davis Site (44LA46) in Lancaster County, Virginia. Quarterly Bulletin of the Archeological Society of Virginia 55, no. 3 (2000): 135-160., This published version...
Alyson Thibodeau is a professor of Earth Sciences at Dickinson College., Larina, Ekaterina, David J. Bottjer, Frank A. Corsetti, Alyson M. Thibodeau, William M. Berelson, A. Joshua West, and Joyce A. Yager. "Ecosystem Change...
For more information on the published version, visit ScienceDirect's Website., Ma, Lin, Francois Chabaux, Eric Pelt, Mathieu Granet, Peter B. Sak, Jerome Gaillardet, Marina Lebedeva, and Susan L. Brantley. "The Effect of...
Marcus Key is a professor of Earth Sciences at Dickinson College. , Rationale: Stable oxygen and carbon isotope ratios are one of the most accurate ways of determining environmental changes in the past, which are used to...
Subduction of seamounts and ridges along thinly sedimented convergent margins results in deformation of the overriding forearc. Exposures of newly recognized late Pleistocene, shallow water deposits (i.e., Marenco formation)...
Passage zones are stratigraphic surfaces found in littoral settings separating deposits diagnostic of subaqueous environments from overlying sequences of subaerial deposits. In glaciovolcanic settings, passage zone surfaces are...
Published as: Wyse Jackson, Patrick N., and Marcus M. Key, Jr. Epizoic Bryozoans on Cephalopods Through the Phanerozoic: A Review. Studi Trentini di Scienze Naturali 94 (2014): 283-91. and Cephalopods have a long geological...
Forests are increasingly threatened by climate-change-fuelled cycles of drought, dieback and wildfires. However, for reasons that remain incompletely understood, some forest stands are more vulnerable than others, leaving a...
Understanding the subsurface structure and function in the near-surface groundwater system, including fluid flow, geomechanical, and weathering processes, requires accurate predictions of the spatial distribution of...
For more information on the published version, visit Springer's Website., Historic Christ Church in Lancaster County, VA (1735), is one of America’s best-preserved examples of colonial Georgian architecture. Among its many...
The southeastern tip of the Península de Nicoya, Costa Rica, on the Caribbean plate margin lies inboard of the rough bathymetric terrain on the subducting Cocos plate and along the landward projection of the convergence vector...
2.0 mm or less) and grains are generally seriate in texture. Other textures, such as the presence of amphibole veins could be an indication of metasomatism at some point. Chemical analysis of mineral compositions reveals...
U–Pb ages have been measured on secondary dolomite and silica cements in Cambrian sandstone at the base of an 840 m thick sub-horizontally bedded sedimentary sequence beneath the Bruce nuclear site in southern Ontario to...
Davis, D.W., C.N. Sutcliffe, A.M. Thibodeau, J. Spalding, D. Schneider, A. Cruden, J. Adams, A. Parmenter, M. Jensen, and Z. Zajacz. "Hydrochronology of a Proposed Deep Geological Repository for Low- and Intermediate-Level...
Ward, Ingrid, Marcus M. Key, Jr., Rosine Riera, Annie Carson, and Michael O'Leary. Insights into the Procurement and Distribution of Fossiliferous Chert Artefacts Across Southern Australia from the Archival Record. Australian...
For more information on the published version, visit Cambridge University Press's Website., Key, Marcus M., Jr., Patrick N. Wyse Jackson, and Stephen H. Felton. "Intracolony Variation in Colony Morphology in Reassembled Fossil...
Yesavage, Tifffany, Gary E. Stinchcomb, Matthew S. Fantle, Peter B. Sak, Alexander Kasznel, Susan L. Brantley. "Investigation of a Diabase-Derived Regolith Profile from Pennsylvania: Mineralogy, Chemistry and Fe Isotope...
For millennia, qeros have been a primary component of ceremonially and politically important toasting rituals in the Andes and retain their cultural significance to this day. These wooden drinking vessels underwent a stylistic...
Reid, Catherine M., Patrick N. Wyse Jackson, and Marcus M. Key, Jr. Latitudinal Influences on Bryozoan Calcification Through the Paleozoic. Paleobiology (Article published online September 2, 2022)....
Mercury is gaining prominence as a proxy for large igneous province (LIP) volcanism in the sedimentary record. Despite temporal overlap between some mass extinctions and LIPs, the precise timing of magmatism relative to major...
For more information on the published version, visit Amazon's Website., Buss, H.L., S.L. Brantley, P.B. Sak, and A.F. White. Mineral Dissolution at the Granite-Saprolite Interface. In Water-Rock Interaction: Proceedings of...
Miller, Scott R., Peter B. Sak, Eric Kirby and Paul R. Bierman. Neogene Rejuvenation of Central Appalachian Topography: Evidence for Differential Rock Uplift From Stream Profiles and Erosion Rates. Earth and Planetary...
For more information on the published version, visit Wiley's Website., Severe global climate change led to the deterioration of environmental conditions in the oceans during the Toarcian Stage of the Jurassic. Carbonate...
Weathering in the critical zone causes volumetric strain and mass loss, thereby creating subsurface porosity that is vital to overlying ecosystems. We used geochemical and geophysical measurements to quantify the relative...
Smith, Abigail M., Marcus M. Key, Jr., Zoe E. Henderson, V. Christine Davis, and David J. Winter. "Pretreatment for Removal of Organic Material is not Necessary for X-Ray-Diffraction Determination of Mineralogy in Temperate...
For more information on the published version, visit Amazon's Website., Navarre, A.K., S.L. Brantley, and P.B. Sak. Processes Controlling Weathering Rind Advancement on Costa Rican Basalt Clasts. In Water-Rock Interaction:...
For more information on the published version, visit Science Direct's Website., Engel, Jacqueline M., Lin Ma, Peter B. Sak, Jerome Gaillardet, Minghua Ren, Mark A. Engle, Susan L. Brantley. "Quantifying Chemical Weathering...
Eppinger, B.J., J. L. Hayes, B.J. Carr, S. Moon, C.L. Cosans, W.S. Holbrook, C.J. Harman, and Z.T. Plante. Quantifying Depth-Dependent Seismic Anisotropy in the Critical Zone Enhanced by Weathering of a Piedmont Schist....
We present a kinematic model for the evolution of the central Appalachian fold-thrust belt (eastern United States) along a transect through the western flank of the Pennsylvania salient. New map and strain data are used to...
This study presents a balanced geologic cross section through the Juniata Culmination of the central Appalachian fold-thrust belt. The transect spans 318 km along a northwest trending line from the southern Valley and Ridge...
For more information on the published version, visit Science Direct's Website., To quantify <a href=https://www.sciencedirect.com/topics/earth-and-planetary-sciences/chemical-weathering title="Learn more about Chemical...
Key, Marcus M., Jr., Abigail M. Smith, Benn Hanns, and Pamela Kane-Sanderson. Rare Report of Bryozoan Fouling of Rock Lobsters (Jasus edwardsii: Decapoda: Palinuridae) from the North Island of New Zealand. New Zealand Journal...
Sak, Peter B., Donald M. Fisher, Thomas W. Gardner, Katherine Murphy, and Susan L. Brantley. Rates of Weathering Rind Formation on Costa Rican Basalt. Geochimica et Cosmochimica Acta 68, no. 7 (2004): 1453-1472....
Navarre-Sitchler, Alexis, Carl I. Steefel, Peter B. Sak, and Susan L. Brantley. A Reactive-Transport Model for Weathering Rind Formation on Basalt. Geochimica et Cosmochimica Acta 75, no. 23 (2011): 7644-7667....
The Talamanca Cordillera in the Central America Arc (Costa Rica‐Panama) preserves the record of the geochemical evolution from an intraoceanic arc to a juvenile continental arc in an active subduction zone, making it a testbed...
Witter, Amy E., and Peter B. Sak. Reply to Letter on “Coal-Tar-Based Sealcoated Pavement: A Major PAH Source to Urban Stream Sediments.' Environmental Pollution 191 (2014): 262-263....
For more information on the published version, visit Science Direct's Website., Witter, Amy E., and Peter B. Sak. "Response to O’Reilly’s Second Letter to the Editor on “Coal-Tar-Based Sealcoated Pavement: A Major PAH Source to...
For more information on the published version, visit Science Direct's Website., The surface of Europa displays numerous generations of intersecting arrays of linear ridges. At some locations along these ridges, older ridges on...
Two competing models exist for the formation of the Pennsylvania salient, a widely studied area of pronounced curvature in the Appalachian mountain belt. The viability of these models can be tested by compiling and analyzing...
Basaltic bedrock dissolves quickly, and its weathering rate is therefore important towards controlling the composition of natural waters, soil formation, and CO2 concentrations in the atmosphere. Despite its importance,...
Callahan, Russell P., Clifford S. Riebe, Sylvain Pasquet, Ken L. Ferrier, Dario Grana, Leonard S. Sklar, Nicholas J. Taylor, Brady A. Flinchum, Jorden L. Hayes, Bradley J. Carr, Peter C. Hartsough, Anthony T. O'Geen, and W....
Key, Marcus M., Jr., Patrick N. Wyse Jackson, and Catherine M. Reid. Trepostome Bryozoans Buck the Trend and Ignore Calcite-Aragonite Seas. Palaeobiodiversity and Palaeoenvironments 102 (2022): 253-263....
We present a kinematic model for the sequential development of the Appalachian fold-thrust belt (eastern U.S.) across a classic transect through the Pennsylvania salient. New map and strain data are used to create a balanced...
For more information on the published version, visit ScienceDirect's Website., Pelt, E., F. Chabaux, C. Innocent, A.K. Navarre-Sitchler, P.B. Sak, S.L. Brantley. "Uranium–Thorium Chronometry of Weathering Rinds: Rock Alteration...
Published as: Key, Marcus M., Jr., and Patrick N. Wyse Jackson. Use of Fossil Bryozoans as Provenance Indicators for Dimension Stones. Studi Trentini di Scienze Naturali 94 (2014): 131-38. For more information on the...
For the first time, we show that rind thicknesses developed on surfaces of a clast with different values of curvature can be used to estimate the duration of clast weathering. To obtain an analytical...
Buss, Heather L., Peter B. Sak, Samuel L. Webb, and Susan L. Brantley. Weathering of the Rio Blanco Quartz Diorite, Luquillo Mountains, Puerto Rico: Coupling Oxidation, Dissolution, and Fracturing. Geochimica et Cosmochimica...
The weathering of rock fragments at or near Earth’s surface results in the in situ conversion of unweathered core material to weathering rind. In field settings, rind thicknesses have been used to constrain the relative ages of...