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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Canada
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Eastern Canada
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Ontario (1)
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Cascadia subduction zone (1)
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East Pacific Ocean Islands
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Hawaii (1)
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Europe (1)
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Lake Nipissing (1)
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North America
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Great Lakes
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Great Lakes region (1)
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Oceania
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Polynesia
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Hawaii (1)
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United States
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Alaska (1)
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California
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Los Angeles County California
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Georgia
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Dade County Georgia (1)
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Illinois
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Cook County Illinois
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Chicago Illinois (10)
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Iowa (1)
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Missouri
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New Madrid region (1)
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Oklahoma
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commodities
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elements, isotopes
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sulfur
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fossils
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Temnospondyli (1)
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Invertebrata
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Articulata
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Mollusca
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microfossils
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geochronology methods
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paleomagnetism (1)
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geologic age
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Tertiary
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Paleozoic
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Ordovician
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minerals
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Primary terms
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Canada
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catalogs (1)
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Cenozoic
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Quaternary
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upper Pleistocene
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Tertiary
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Paleogene
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Eocene
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upper Eocene
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Chordata
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Vertebrata
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crystal growth (1)
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Invertebrata
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isostasy (1)
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isotopes
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North America
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Great Lakes region (1)
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paleontology (3)
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Paleozoic
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Cambrian
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Upper Cambrian
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Eau Claire Formation (1)
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Carboniferous
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Pennsylvanian
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Francis Creek Shale (1)
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Middle Pennsylvanian
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Carbondale Formation (1)
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Ordovician
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Lower Ordovician
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Prairie du Chien Group (1)
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Middle Ordovician
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Platteville Formation (1)
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Upper Ordovician
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Maquoketa Formation (2)
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Neda Formation (1)
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Silurian
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Lower Silurian
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Alexandrian (1)
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Llandovery
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Rhuddanian (1)
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Wenlock (1)
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Middle Silurian
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Racine Dolomite (4)
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Upper Silurian
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petroleum (1)
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reefs (1)
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sedimentary structures
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sediments
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shorelines (1)
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sulfur
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United States
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Alaska (1)
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Georgia
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Dade County Georgia (1)
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Kane County Illinois (2)
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Kankakee County Illinois (1)
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Iowa (1)
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Midwest (2)
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Mississippi
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New Madrid region (1)
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New York City New York (1)
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Oklahoma
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Tennessee
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Hamilton County Tennessee (1)
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Washington
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Wisconsin
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Kenosha County Wisconsin (1)
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waste disposal (1)
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rock formations
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sedimentary rocks
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sedimentary rocks
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clastic rocks
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sedimentary structures
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sedimentary structures
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secondary structures
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concretions (1)
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sediments
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sediments
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clastic sediments
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silt (1)
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soils
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soils (1)
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Platymerella —a cool-water virgianid brachiopod fauna in southern Laurentia during the earliest Silurian
The present is the key to the paleo-past: Charles R. Knight’s reconstruction of extinct beasts for the Field Museum, Chicago
ABSTRACT Although he was legally blind, Charles R. Knight (1874–1953) established himself as the premier paleontological artist in the early 1900s. When the Field Museum, Chicago, commissioned a series of large paintings to document the evolution of life, Knight was the obvious choice. Knight considered himself an artist guided by science; he researched and illustrated living animals and modern landscapes to better understand and represent extinct life forms within their paleoecosystems. Knight began the process by examining fossil skeletons; he then constructed small models to recreate the animals’ life anatomy and investigate lighting. Once details were finalized, Knight supervised assistants to transfer the study painting to the final mural. The Field Museum mural process, a monumental task of translating science into public art, was accompanied by a synergistic tension between Knight, who wanted full control over his artwork, and the museum’s scientific staff; the correct position of an Eocene whale’s tail—whether uplifted or not—documents a critical example. Although modern scientific understanding has rendered some of Knight’s representations obsolete, the majority of his 28 murals remain on display in the Field Museum’s Evolving Planet exhibit. Museum educators contrast these murals with contemporary paleontological knowledge, thereby demonstrating scientific progress for better public understanding of the nature of science.
Seismic Hazard in the Nation's Breadbasket
Chapter 7. Europe and Chicago
Extract from beginning of chapter: Anyone who is studying dissected volcanoes and ancient lavas and breccia should have some acquaintance with active volcanoes and regions of modern volcanism. So I decided to visit Vesuvius and the Sicilian region, incidentally make the acquaintance of some of the British petrographers, and pay my respects to Rosenbusch in Heidelberg. By the end of February 1890, I was able to leave Washington for a two-month trip, going directly from New York to London via Southampton. Although I had never met Judd or Teall, they were hospitable enough, when they learned of my intention to stop in London on my way to the Continent, to invite me to come directly to their homes upon my arrival. Judd's note reached me before I left Washington, and Teall's caught me before I left the steamer at Southampton. It resulted in my spending a few days with Judd on my way out and in visiting Teall on the way back—a most memorable experience, quite as enlightening as the study of active volcanoes. IMPRESSIONS OF JOHN JUDD After a night at Charing Cross Hotel, I found Judd in his rooms in the “science schools,” 1 South Kensington, and received a most cordial welcome. Probably no British geologist equaled Judd in genial temperament and the ability to be entertaining. His manner was frank and outspoken; his attitude toward his colleagues was generous and not critical. He took an enthusiastic interest in petrography and expressed his opinions with such positiveness that one was led to believe
Impacts of Road Salt Runoff on Water Quality of the Chicago, Illinois, Region
A diminutive temnospondyl amphibian from the Pennsylvanian of Illinois
USGS National Seismic Hazard Maps
Mackenziurus emielityi new species; a new encrinurine (Trilobita) from the Silurian (Wenlock-Ludlow) of Wisconsin and Illinois
An integrated framework for evaluating subsurface contamination remediation technologies
Predicted Impact of a New Highway on a Spring-Fed Wetland, Cook County, Illinois
Assessing a fractured landfill cover using electrical resistivity and seismic refraction techniques
Sulfur isotope evidence for regional recharge of saline water during continental glaciation, north-central United States
A numerical model of a spherical viscoelastic self-gravitating Earth has been used to predict the glacio-isostatic deformation of the Lake Michigan basin during late-glacial and postglacial times. Predictions of present rate of vertical movement agree well in trend but slightly exceed in magnitude the observed rate of tilting indicated by lake-level gauges. Predicted uplift curves for the four dominant outlets controlling the ancestral lakes of the Lake Michigan basin indicate an outlet chronology comparable to that proposed by glacial geologists despite the fact that the Chicago and Port Huron outlets are not predicted to be stable as is commonly believed. Predictions of tilting of the Algonquin shoreline match observations north of the Algonquin hinge line, but the predicted shoreline plunges below the present level of Lake Michigan at the hinge line location. In opposition to the commonly held belief in crustal stability south of the Algonquin hinge line, the predictions indicate considerable vertical movement there continuing to the present. If the predictions are correct, the subhorizontal shorelines south of the hinge line have been misinterpreted because the Glenwood shoreline, reported to be subhorizontal there, is predicted to be strongly tilted. Alternatively, correct interpretation of this shoreline implies serious deficiencies in the assumed ice-sheet history or Earth rheology used as input to the model.
First report of Polyplacophora (Mollusca) from the Silurian of North America
Occurrence of secondary magnetite within biodegraded oil
Geology and deep tunnels in Chicago
Abstract Low-gradient streams and generally flat topography have always presented a problem of flooding within the Chicago area. As settlement expanded, the flooding produced greater and more serious results. As early as 1816, the city's leaders began major engineering work to solve these problems. The latest efforts toward a solution currently include a system of over 100 miles (161 km) of large-diameter tunnels in the Chicago area bedrock. These tunnels will intercept overflow from combined sanitary and stormwater systems and convey it to temporary storage reservoirs prior to its being pumped to sewage treatment facilities. Geologic investigations made during a study for the tunnel sites included test drilling and coring, geophysical logging of boreholes, laboratory testing of samples, seismic surveying, and testing for groundwater. The drilling, coring, and logging furnished data that have been of considerable help in mapping and describing the individual units of Silurian and Ordovician strata of the area. The seismic survey indicated numerous closed depressions on the surface of the bedrock and also sug-gested that several faults are present with displacements of 10 to 50 feet (3 to 15 m).