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Geology: Recent submissions
Now showing items 461-480 of 480
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INSECT TRACE FOSSILS ON DINOSAUR BONES FROM THE UPPER JURASSIC MORRISON FORMATION, NORTHEASTERN WYOMING, AND THEIR USE IN VERTEBRATE TAPHONOMY
(University of Kansas, 2008-08-21)The skeletons of a diplodocid and three Camarasaurus sauropods, ranging from mostly articulated to disarticulated, were collected from a quarry in the Upper Jurassic Morrison Formation in northeastern Wyoming by the ... -
Microbial Activity during Biodegradation and its Effects on Groundwater Velocity in a Contaminated Aquifer
(University of Kansas, 2008-03-26)A petroleum hydrocarbon plume was introduced into a controlled flow gate within the relatively homogenous Borden aquifer, Canada. Down-gradient of the release, O2 was added to stimulate microbial activity and biodegradation ... -
ICHNOFOSSILS OF THE PALEOGENE WILLWOOD FORMATION AND THE PALEOCENE-EOCENE THERMAL MAXIMUM (PETM): RESPONSE OF AN ANCIENT SOIL ECOSYSTEM TO TRANSIENT GLOBAL WARMING
(University of Kansas, 2007-12-17)This research combines paleopedological, paleontological, neoichnological, and ichnological methods to understand better the paleoenvironmental, paleoecological, and paleoclimatic significance of the trace fossils of ... -
Depositional Environments and Sequence Stratigraphy of the Lower Cretaceous Dakota Sandstone in the Ridgway Area, Southwestern Colorado
(University of Kansas, 2008-01-30)The Dakota Sandstone records the initial transgression of the Cretaceous western interior seaway across southwestern Colorado. This transgression does not show a simple pattern. The sequence stratigraphic analysis of the ... -
The relationship between crustal density and volcanic rocks in the Western United States including a comparison of isostatic compensation techniques for gravity data correction
(University of Kansas, 2008-06-19)Processes and properties controlling magma ascent may include magma viscosity, the stress regime in surrounding country rock, geometric relationship between the rising magma and connected source area (if any), and density ... -
Investigation of active faulting at the Emigrant Peak fault in Nevada using shallow seismic reflection and ground penetrating radar
(University of Kansas, 2007-12-18)The objective of this study was to assess fault displacement, off-fault deformation, and alluvial fan stratigraphy at the Emigrant Peak fault zone (EPFZ) in Fish Lake Valley, Nevada utilizing shallow seismic reflection ... -
Near-surface seismic reflection applications
(ICEEG, 2004)Nonintrusive methods of gaining knowledge about the Earth’s subsurface comprise several of the procedures used routinely in near-surface seismology, including reflection, refraction, and surface-wave analysis. During the ... -
Static corrections from shallow-reflection surveys
(Society of Exploration Geophysicists, 1990-06)Shallow seismic reflection surveys can assist in determination of velocity and/or thickness variations in nearsurface layers. Static corrections to seismic reflection data compensate for velocity and thickness variations ... -
Detecting voids in a 0.6 m coal seam, 7 m deep, using seismic reflection
(Elsevier Science Publishers, 1991)Surface collapse over abandoned subsurface coal mines is a problem in many parts of the world. High-resolution P-wave reflection seismology was successfully used to evaluate the risk of an active sinkhole to a main north-south ... -
Automatic deployment of a 2-D geophone array for efficient ultra-shallow seismic imaging
(Geophysical Research Letters, 2006)The cost of three-dimensional seismic-reflection surveys is approximately inversely proportional to the square of the target depth, which renders ultra-shallow 3-D surveys uneconomical when employing conventional acquisition ... -
Structure of the Salina-Forest City interbasin boundary from seismic studies
(Kansas Geological Survey, 1989)As petroleum-exploration efforts in the midcontinent become directed toward smaller fields and the search for minerals is extended into new areas, the edges of the Salina and Forest City basins will become of increased ... -
Kansas refraction profiles
(Kansas Geological Survey, 1989)Historically, refraction surveys have been conducted in hopes of mapping distinct layers within the earth. Refraction is a useful tool provided its limitations and the assumption that layers increase in seismic velocity ... -
Early Permian Carbonitidae (Ostracoda): ontogeny, affinity, environment and systematics
(Geological Society Publishing House, 2005-10) -
A wideband radar for high-resolution mapping of near-surface internal layers in glacial ice
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-03)Snow accumulation rate is an important parameter in determining the mass balance of polar ice sheets. Accumulation rate is currently determined by analyzing ice cores and snow pits. Inadequate sampling of the spatial ... -
Texture analysis of SAR sea ice imagery using gray level co-occurrence matrices
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-03)This paper presents a preliminary study for mapping sea ice patterns (texture) with 100-m ERS-1 synthetic aperture radar (SAR) imagery. We used gray-level co-occurrence matrices (GLCM) to quantitatively evaluate textural ... -
Information fusion for estimation of summer MIZ ice concentration from SAR imagery
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-05)In this paper we define the concept of information fusion and show how we used it to estimate summer sea ice concentration in the marginal ice zone (MIZ) from single-channel SAR satellite imagery, We used data about melt ... -
The midcontinent rift system
(ANNUAL REVIEWS INC, 1985) -
Latest Neoproterozoic to Mid-Cambrian age for the main deformation phases of the Transantarctic Mountains: new stratigraphic and isotopic constraints from the Pensacola Mountains, Antarctica
(GEOLOGICAL SOC PUBL HOUSE, 2001-03)New isotopic ages and a fresh understanding of stratigraphic relations among siliciclastic strata in the Pensacola Mountains along the northern margin of the East Antarctic craton result in removal of some constraints for ... -
A palaeomagnetic and palaeobiogeographical perspective on latest Neoproterozoic and early Cambrian tectonic events
(GEOLOGICAL SOC PUBL HOUSE, 2004-05)During the latest Neoproterozoic to Mid-Cambrian time (580-505 Ma ago), the Earth underwent significant changes in palaeogeography that included rifting of a possible supercontinent and the near simultaneous formation of ...