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Articles 1 - 15 of 15
Full-Text Articles in Physical Sciences and Mathematics
The Modern Mississippi: Provenance Indicators And Human Impact, Brittney Gregory
The Modern Mississippi: Provenance Indicators And Human Impact, Brittney Gregory
Brittney Gregory
No abstract provided.
Background 1: Mammoth Hot Springs Background, Ana K. Houseal
Background 1: Mammoth Hot Springs Background, Ana K. Houseal
Ana K Houseal
Mammoth Hot Springs geologic background
Fluorescent Chrysotile From Sterling Hill, New Jersey, James A. Van Fleet, Earl R. Verbeek
Fluorescent Chrysotile From Sterling Hill, New Jersey, James A. Van Fleet, Earl R. Verbeek
James A. Van Fleet
Minerals of the serpentine group, notably chrysotile and to a lesser extent lizardite, are widely present at both Franklin and Sterling Hill. They are late-stage hydrous magnesium silicate minerals that formed by hydrothermal alteration of earlier species, among them willemite and tephroite, and are also common components of hydrothermal veins cutting the ore bodies and the enclosing marble (Dunn, 1995). Although long recognized in the area (Fowler, 1825), local serpentine was not documented as a fluorescent mineral until 2004, when a brief description of a fluorescent serpentine from Franklin appeared in The Picking Table (Cianciulli, 2004). In the present paper, …
Hardystonite From The Desert View Mine, California, James A. Van Fleet, Earl R. Verbeek Phd
Hardystonite From The Desert View Mine, California, James A. Van Fleet, Earl R. Verbeek Phd
James A. Van Fleet
The fluorescent mineral hardystonite is confirmed in a specimen from the Desert View Mine, California. Hardystonite had been known only from Franklin, New Jersey for over 100 years.
Letter: A Developing Schism In Flood Geology, Marcus R. Ross
Letter: A Developing Schism In Flood Geology, Marcus R. Ross
Marcus R. Ross
First paragraph: Froede and Akridge are correct to recognize that creation geology includes two widely divergent groups seeking to reconstruct Earth history within a Biblical framework. Such has been the case throughout the history of creationism, going back to disagreements between Harold Clark and George McCready Price over the reality (or not) of the geologic column. With the increased number of geologically trained young-Earth creationists, discussions over these issues have become more common.
The Flood/Post-Flood Boundary (Comment And Reply), Marcus R. Ross
The Flood/Post-Flood Boundary (Comment And Reply), Marcus R. Ross
Marcus R. Ross
First paragraph: Michael Oard’s recent article on the Flood/post-Flood boundary consists of two parts: the first is response to my earlier paper on utilizing mammalian biostratigraphy in evaluating post-Flood boundary locations, which found placement of this boundary at or near the Pliocene/Pleistocene boundary untenable; the second part is a set of disparate observations placed in support of a high post-Flood boundary placed at variable locations in the “Late Cenozoic”. (comment continues; download for full comment and reply by Michael Oard)
Yellow-Fluorescing Calcite From Sterling Hill, James A. Van Fleet, E. R. Verbeek
Yellow-Fluorescing Calcite From Sterling Hill, James A. Van Fleet, E. R. Verbeek
James A. Van Fleet
No abstract provided.
Clay Fabric And Mass Physical Properties Of Surficial Marine Sediment Near The Deepwater Horizon Oil Spill, Andrew Head, Richard H. Bennett, Jessica R. Douglas, Kenneth J. Curry
Clay Fabric And Mass Physical Properties Of Surficial Marine Sediment Near The Deepwater Horizon Oil Spill, Andrew Head, Richard H. Bennett, Jessica R. Douglas, Kenneth J. Curry
Kenneth J. Curry
Surficial sediment was obtained on the RV Cape Hatteras Cruise (2010) from the seafloor at a water depth of 1570 meters located at latitude 28°44'20.16"N and longitude 88°20'24.96"W in close proximity to the Deepwater Horizon well, Gulf of Mexico. Preliminary clay nano- and microfabric observation using a transmission electron microscope (TEM) depicted a sediment rich in clays and organic matter (OM) especially in the upper 2 cm subbottom. Initial analysis of TEM micrographs depicted a high porosity clay sediment. Initial study of the mass physical properties revealed water content ωt = 67.32 – 67.28% (percent total mass), porosity n= 84.1 …
Sharks Of The Devonian, Andrew Blitman
Bedrock Geology Of The East Brookfield 7.5 Min. Quadrangle (Ebq), South-Central Massachusetts: Structural And Petrologic Evidence For The Nature Of Regional Deformation And Kinematics Of The Southern Central Maine Zone, Thomas Bradley Walker
Thomas Bradley Walker
Across-strike shortening from Maine to Connecticut is the most conspicuous orogen-scale feature of the New England Appalachians. Mapping (1:24000) and structural analysis in the EBQ and adjacent quads demonstrate that shortening in the southern Central Maine zone was accommodated by orogen-parallel elongation and orogen-normal flattening and thrusting. Map units are Rangeley Fm. (Sil-Bt-Grt schist and gneiss, Bt-Pl±Grt granofels; thin marble layers); Paxton Fm. (Bt-Pl±Grt granofels; calc-silicate granofels; Bt-Sil-Grt schist); tonalitic Bt orthogneiss (Bt-Pl-Qtz±Grt); migmatitic felsic and mafic gneisses and amphibolite; and leucopegmatites (10-m-scale thickness). Foliations (primarily compositional layering, leucosomes in the plane of flattening, Bt SPO, flattened quartz and feldspar …
Central New York Varve Chronology: A Suggestion For Quaternary Geologists, Thomas Bradley Walker
Central New York Varve Chronology: A Suggestion For Quaternary Geologists, Thomas Bradley Walker
Thomas Bradley Walker
Work done to build a chronology of deglaciation using varves has been the focus of a number of researchers in New England for many years. The locations employed to build their timeline have been quite useful to date. However, New England is not the only place in the Northeast conducive to studying the last deglaciation of North America. The discovery of a set of ice proximal varves in an ancient glacial lake, now a swamp, in Oswego County, central New York, has shown that some locations outside of New England would be suitable for similar studies. The land having been …
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
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 …
The Impact Of Grey Literature In Advancing Global Karst Research: An Information Needs Assessment For A Globally Distributed Interdisciplinary Community, Todd A. Chavez, Anna H. Perrault, Pete Reehling, Courtney Crummett
The Impact Of Grey Literature In Advancing Global Karst Research: An Information Needs Assessment For A Globally Distributed Interdisciplinary Community, Todd A. Chavez, Anna H. Perrault, Pete Reehling, Courtney Crummett
Anna H. Perrault
A survey of the global karst community was conducted in 2006. The survey was distributed via the World Wide Web to known karst researchers. The instrument was designed to generate an initial inventory of core grey information types, to assess levels of usage of grey information by the respondents, and to gauge the karst community’s willingness to participate in building and expanding both this collection and the associated controlled vocabularies.
The Impact Of Grey Literature In Advancing Global Karst Research: An Information Needs Assessment For A Globally Distributed Interdisciplinary Community, Todd A. Chavez, Anna H. Perrault, Pete Reehling, Courtney Crummett
The Impact Of Grey Literature In Advancing Global Karst Research: An Information Needs Assessment For A Globally Distributed Interdisciplinary Community, Todd A. Chavez, Anna H. Perrault, Pete Reehling, Courtney Crummett
Todd A. Chavez
A survey of the global karst community was conducted in 2006. The survey was distributed via the World Wide Web to known karst researchers. The instrument was designed to generate an initial inventory of core grey information types, to assess levels of usage of grey information by the respondents, and to gauge the karst community’s willingness to participate in building and expanding both this collection and the associated controlled vocabularies.
Arctic Gold, Alaska, Joel Halpern
Arctic Gold, Alaska, Joel Halpern
Joel M. Halpern
To armchair travelers, especially in the United States, few places have a stronger allure than far-off Alaska. Now that the "wild and woolly" west is really alive only so far as it serves to accentuate our historical heritage, this land of the far north has become our last frontier. To the geologist, mineralogist, and, I might add, even to the layman, one of the most interesting features of the territory is its large placer gold deposits. Every American boy has heard of the Nome gold rush, and the more literarily adventurous have undoubtedly delved into the sagas of Jack London. …