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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
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Africa
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East African Rift (1)
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North Africa
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Algeria (1)
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Southern Africa
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Invertebrata
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Primary terms
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Africa
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Southern Africa
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Bushveld Complex (1)
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Asia
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bauxite deposits (1)
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brines (1)
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Canada
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carbon
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Cenozoic
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upper Quaternary (1)
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Tertiary
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Neogene
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Citronelle Formation (2)
-
-
-
Paleogene
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Eocene
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upper Eocene (1)
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Ocala Group (1)
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Oligocene (1)
-
-
-
-
Central America
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Guatemala (1)
-
-
Chordata
-
Vertebrata
-
Tetrapoda
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Mammalia
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Theria
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Eutheria
-
Proboscidea
-
Elephantoidea
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Elephantidae
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Invertebrata
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isotopes
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radioactive isotopes
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stable isotopes
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D/H (1)
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O-18/O-16 (3)
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kaolin deposits (1)
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land subsidence (53)
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land use (8)
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magmas (1)
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maps (3)
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Mesozoic
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McMurray Formation (1)
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metal ores
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metals
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iron (1)
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metamorphic rocks
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metamorphism (1)
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Mexico
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noble gases
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North America
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oil and gas fields (4)
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oxygen
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paleoclimatology (4)
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paleogeography (2)
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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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Copper Ridge Dolomite (1)
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Carboniferous
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Mississippian
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Osagian
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Madison Group (1)
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Upper Mississippian (1)
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Pennsylvanian
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Wapanucka Limestone (1)
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Devonian
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Elk Point Group (1)
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Knox Group (2)
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Ordovician
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Ellenburger Group (1)
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Epler Formation (1)
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Viola Limestone (1)
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Permian
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Castile Formation (1)
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Chase Group (1)
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Hutchinson Salt Member (3)
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Lower Permian (1)
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Stone Corral Formation (1)
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palynomorphs
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miospores
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pollen (1)
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permafrost (1)
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petroleum (6)
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petrology (1)
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Plantae
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algae
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Spermatophyta
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plate tectonics (2)
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pollution (9)
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Transvaal Supergroup (1)
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upper Precambrian
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Malmani Subgroup (2)
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Ventersdorp Supergroup (1)
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remote sensing (6)
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reservoirs (1)
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roads (6)
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rock mechanics (7)
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sea-level changes (4)
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sedimentary petrology (3)
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sedimentary rocks
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bauxite (1)
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carbonate rocks
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chalk (5)
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limestone
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chemically precipitated rocks
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evaporites
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salt (5)
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sedimentary structures
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sediments
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soils
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South America
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sulfur
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tunnels (5)
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United States
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Alabama
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rock formations
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sedimentary rocks
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sedimentary rocks
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bauxite (1)
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carbonate rocks
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chalk (5)
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dolostone (7)
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grainstone (1)
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limestone
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calcarenite (1)
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dolomitic limestone (1)
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travertine (1)
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chemically precipitated rocks
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chert (1)
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evaporites
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salt (5)
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clastic rocks
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marl (1)
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mudstone (2)
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sandstone (4)
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shale (1)
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coal (1)
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oil sands (1)
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siliciclastics (2)
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sedimentary structures
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channels (1)
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sedimentary structures
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biogenic structures
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algal structures
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algal biscuits (1)
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algal mats (1)
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bioturbation (1)
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stromatolites (1)
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planar bedding structures
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laminations (1)
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secondary structures
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concretions (1)
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tracks (1)
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sediments
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sediments
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clastic sediments
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alluvium (2)
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clay (6)
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gravel (4)
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loess (1)
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mud (1)
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sand (5)
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silt (2)
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marine sediments (1)
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siliciclastics (2)
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soils
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paleosols (1)
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soils
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Terra rossa (1)
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sinkholes
The 21st Glossop Lecture: engineering geology and the geoscience time machine
Proposal procedure to evaluate the seismic stability of underground cavities in seismic microzonation studies
Road sinkhole detection with 2D ambient noise tomography
Improved Automated Mapping of Sinkholes Using High-Resolution DEMs
Characterization of a Karst Site using Electrical Resistivity Tomography and Seismic Full Waveform Inversion
Sinkhole detection with 3D full seismic waveform tomography
Terrestrial kaolin deposits trapped in Miocene karstic sinkholes on planation surface remnants, Transdanubian Range, Pannonian Basin (Hungary)
Chapter 1 Introduction to Geological Hazards in the UK: Their Occurrence, Monitoring and Mitigation
Abstract The UK is perhaps unique globally in that it presents the full spectrum of geological time, stratigraphy and associated lithologies within its boundaries. With this wide range of geological assemblages comes a wide range of geological hazards, whether geophysical (earthquakes, effects of volcanic eruptions, tsunami, landslides), geotechnical (collapsible, compressible, liquefiable, shearing, swelling and shrinking soils), geochemical (dissolution, radon and methane gas hazards) or related to georesources (coal, chalk and other mineral extraction). An awareness of these hazards and the risks that they pose is a key requirement of the engineering geologist. This volume sets out to define and explain these geohazards, to detail their detection, monitoring and management, and to provide a basis for further research and understanding, all within a UK context.
Abstract The dissolution of limestone and chalk (soluble carbonates) through geological time can lead to the creation of naturally formed cavities in the rock. The cavities can be air, water, rock or soil infilled and can occur at shallow levels within the carbonate rock surface or at deeper levels below. Depending upon the geological sequence, as the cavities break down and become unstable they can cause overlying rock strata to settle and tilt and also collapse of non-cemented strata and superficial deposits as voids migrate upwards to the surface. Natural cavities can be present in a stable or potentially unstable condition. The latter may be disturbed and triggered to cause ground instability by the action of percolating water, loading or vibration. The outcrops of various limestones and chalk occur widely across the UK, posing a significant subsidence hazard to existing and new land development and people. In addition to subsidence they can also create a variety of other problems such as slope instability, generate pathways for pollutants and soil gas to travel along and impact all manner of engineering works. Knowledge of natural cavities is essential for planning, development control and the construction of safe development.
Chapter 16 Geohazards caused by gypsum and anhydrite in the UK: including dissolution, subsidence, sinkholes and heave
Abstract Gypsum and anhydrite are both soluble minerals that form rocks that can dissolve at the surface and underground, producing sulphate karst and causing geological hazards, especially subsidence and sinkholes. The dissolution rates of these minerals are rapid and cavities/caves can enlarge and collapse on a human time scale. In addition, the hydration and recrystallization of anhydrite to gypsum can cause considerable expansion and pressures capable of causing uplift and heave. Sulphate-rich water associated with the deposits can react with concrete and be problematic for construction. This paper reviews the occurrence of gypsum and anhydrite in the near surface of the UK and looks at methods for mitigating, avoiding and planning for the problems associated with these rocks.
Microgravity Mapping of an Inception Doline Shaft System
Interpretation of Paleozoic paleokarst features in the Arkoma Basin of Oklahoma using 3D seismic and well logs
Identification, investigation and classification of surface depressions and chalk dissolution features using integrated LiDAR and geophysical methods
Integrated Investigation For Geological Detection and Grouting Assessment: A Case Study in Qingdao Subway Tunnel, China
A note on the erosive nature of potholes in the Bushveld Complex
Polarity Change Extraction of GPR Data for Under-road Cavity Detection: Application on Sudeoksa Testbed Data
Foundation Evaluation of a Repeater Installation Building Using Electrical Resistivity Tomography and Seismic Refraction Tomography
Fracture and conduit controls on groundwater movement in the Carboniferous Limestone of the eastern Mendip Hills, Somerset, England
Abstract Karst science is beginning to recognize and understand better the interaction between conduits and the fractures and/or pore spaces within the aquifer. The relationship has important significance in relation to the understanding of contaminant transport, resource management and dewatering practices. This study presents the results of a dye trace carried out to investigate the link between the aquifer and conduits near a large dewatered quarry in the Mendip Hills in Somerset, England. At the point of undertaking the study, there were no records of the quarry directly intercepting any conduits but water from the conduit(s) is known to be drawn into the quarry. During the study, water from the conduits was observed to be lost to and gained from the fractures in different places in the aquifer. This complexity highlights the dependence of conduit flow on water levels in the aquifer and the sensitivity of groundwater in karstified aquifers to contamination.
ABSTRACT The Mitchell Plateau of south-central Indiana is one of the iconic karst landscapes of the United States. The sinkhole-dimpled forests, fields, and farms; the extensive cave systems; and the deep windows into the groundwater system have fostered curiosity, exploration, and publication since the mid-1800s. This paper is designed to complement a field excursion to the classic features of this landscape. Included are literature reviews focused on three karst basins of the Mitchell Plateau: Mill Creek–Mosquito Creek, Bluespring Caverns, and Lost River. Geomorphic, hydrologic, and geochemical data are synthesized in the modern context of our understanding of epigenetic karst. Revealed are three styles of karst basin: (1) small, shallow karst aquifers strongly controlled by meteoric recharge and epikarst percolation; (2) intermediate-size karst aquifers with significant base flow and surface-water–groundwater interaction; and (3) regional aquifer systems with outcrop belt recharge, downdip transport into confinement with long water-rock interaction times, and artesian flow or entrainment of mineralized waters through fractures into springs or surface waters. Quaternary glaciation has greatly influenced the vertical position of base level through river incision and sediment aggradation; conduit development is controlled by proximity to the major rivers and the stratigraphic position of conduits.