Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Hydrology (1907)
- Geomorphology (1756)
- Sedimentology (1561)
- Stratigraphy (1428)
- Environmental Sciences (1354)
-
- Paleontology (1259)
- Geophysics and Seismology (1168)
- Soil Science (1118)
- Other Earth Sciences (918)
- Oceanography and Atmospheric Sciences and Meteorology (862)
- Geochemistry (852)
- Engineering (810)
- Other Environmental Sciences (575)
- Life Sciences (555)
- Civil and Environmental Engineering (531)
- Other Engineering (469)
- Tectonics and Structure (464)
- Environmental Engineering (456)
- Materials Science and Engineering (434)
- Social and Behavioral Sciences (420)
- Metallurgy (413)
- Other Materials Science and Engineering (412)
- Ceramic Materials (405)
- Geography (290)
- Environmental Monitoring (212)
- Plant Sciences (205)
- Ecology and Evolutionary Biology (204)
- Institution
-
- Western Michigan University (19354)
- University of Nebraska - Lincoln (1807)
- Missouri University of Science and Technology (677)
- University of Kentucky (577)
- Utah State University (507)
-
- University of South Florida (492)
- Montana Tech Library (460)
- Portland State University (448)
- University of North Dakota (407)
- Western Kentucky University (365)
- University of New Mexico (325)
- University of Nevada, Las Vegas (264)
- University of Arkansas, Fayetteville (252)
- Smith College (219)
- Central Washington University (217)
- University of Texas at El Paso (189)
- Brigham Young University (183)
- Old Dominion University (170)
- Michigan Technological University (157)
- Louisiana State University (129)
- University of Dar es Salaam (127)
- University of Alabama at Birmingham (124)
- University at Albany, State University of New York (112)
- Stephen F. Austin State University (109)
- West Virginia University (109)
- Illinois State University (104)
- City University of New York (CUNY) (103)
- Fort Hays State University (84)
- University of South Carolina (75)
- Wayne State University (73)
- Keyword
-
- Geology (729)
- Nebraska (496)
- Montana (275)
- Groundwater (267)
- Geochemistry (198)
-
- Kentucky (196)
- Karst (166)
- Stratigraphy (149)
- Rock (127)
- Tectonics (123)
- Butte (120)
- Utah (120)
- 3d model (116)
- Water (116)
- Geomorphology (115)
- Geophysics (113)
- Hydrogeology (105)
- Physical Sciences (99)
- Limestone (91)
- Hydrology (90)
- Copper (87)
- Petrology (82)
- Seismology (79)
- Shale (76)
- Test (75)
- Logs (73)
- Earth sciences (72)
- Hole (72)
- Map (71)
- Sedimentology (69)
- Publication Year
- Publication
-
- Legacy Scout Tickets from Pure Oil Company (11044)
- Thin Sections (6677)
- Legacy Color Lithology Strip Logs (1152)
- Conservation and Survey Division: Faculty and Staff Publications (897)
- Theses and Dissertations (626)
-
- United States Geological Survey: Staff Publications (507)
- Masters Theses (475)
- Bachelors Theses and Reports, 1928 - 1970 (423)
- Earth and Planetary Sciences ETDs (318)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (276)
- Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works (266)
- Map and Chart--KGS (234)
- Dissertations and Theses (233)
- Geosciences: Faculty Publications (215)
- International Journal of Speleology (213)
- Geology Faculty Publications and Presentations (194)
- USF Tampa Graduate Theses and Dissertations (181)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (178)
- Open Access Theses & Dissertations (175)
- Geolographs (174)
- Graduate Theses and Dissertations (146)
- Geosciences Faculty Publications (138)
- Mammoth Cave Research Symposia (133)
- Electronic Theses and Dissertations (130)
- Tanzania Journal of Science (127)
- All 3D Rock Models (116)
- Bulletin of the University of Nebraska State Museum (1924–2023) (112)
- Geology Theses and Dissertations (111)
- Robert F. Diffendal, Jr., Publications (103)
- OES Theses and Dissertations (101)
- Publication Type
- File Type
Articles 25561 - 25590 of 29961
Full-Text Articles in Geology
Microstructural Analysis Of A Drill Core From The Rhode Island Formation: Upper 750 Feet, Ashlee Kirkwood
Microstructural Analysis Of A Drill Core From The Rhode Island Formation: Upper 750 Feet, Ashlee Kirkwood
Undergraduate Review
No abstract provided.
The Sparrow Surface Water-Quality Model: Theory, Application And User Documentation, G. E. Schwarz, A. B. Hoos, R. B. Alexander, R. A. Smith
The Sparrow Surface Water-Quality Model: Theory, Application And User Documentation, G. E. Schwarz, A. B. Hoos, R. B. Alexander, R. A. Smith
United States Geological Survey: Publications
SPARROW (SPAtially Referenced Regressions On Watershed attributes) is a watershed modeling technique for relating water-quality measurements made at a network of monitoring stations to attributes of the watersheds containing the stations. The core of the model consists of a nonlinear regression equation describing the non-conservative transport of contaminants from point and diffuse sources on land to rivers and through the stream and river network. The model predicts contaminant flux, concentration, and yield in streams and has been used to evaluate alternative hypotheses about the important contaminant sources and watershed properties that control transport over large spatial scales.
This report provides …
Taxonomic Considerations In Listing Subspecies Under The U.S. Endangered Species Act, Susan M. Haig, Erik A. Beever, Steven M. Chambers, Hope M. Draheim, Bruce D. Dugger, Susie M. Dunham, Elise Elliott-Smith, Joseph B. Fontaine, Dylan C. Kesler, Brian J. Knaus, Iara F. Lopes, Pete Loschl, Thomas D. Mullins, Lisa M. Sheffield
Taxonomic Considerations In Listing Subspecies Under The U.S. Endangered Species Act, Susan M. Haig, Erik A. Beever, Steven M. Chambers, Hope M. Draheim, Bruce D. Dugger, Susie M. Dunham, Elise Elliott-Smith, Joseph B. Fontaine, Dylan C. Kesler, Brian J. Knaus, Iara F. Lopes, Pete Loschl, Thomas D. Mullins, Lisa M. Sheffield
United States Geological Survey: Staff Publications
The U.S. Endangered Species Act (ESA) allows listing of subspecies and other groupings below the rank of species. This provides the U.S. Fish and Wildlife Service and the National Marine Fisheries Service with a means to target the most critical unit in need of conservation. Although roughly one-quarter of listed taxa are subspecies, these management agencies are hindered by uncertainties about taxonomic standards during listing or delisting activities. In a review of taxonomic publications and societies, we found few subspecies lists and none that stated standardized criteria for determining subspecific taxa. Lack of criteria is attributed to a centuries-old debate …
Conserving Biodiversity In Human-Dominated Landscapes, Dale D. Goble, J. Michael Scott, Frank W. Davis
Conserving Biodiversity In Human-Dominated Landscapes, Dale D. Goble, J. Michael Scott, Frank W. Davis
United States Geological Survey: Staff Publications
The two volumes of The Endangered Species Act at Thirty look backward to evaluate the effectiveness of the act over its first three decades (Wilcove and McMillan 2006; Scott et al. 2006, chap. 2; Goble, this volume; Svancara, this volume; Callicott, this volume; Norton, this volume) and also forward to suggest how it can be used as a cornerstone for conserving biological diversity in increasingly human-dominated landscapes (Davis et al. 2006; Bean 2006). The chapters in part 2 of this volume, for example, appraise the science of the 1990s and 2000s at both the large scale (Lomolino, this volume; Naeem …
Endangered Species Time Line, Leona K. Svancara, J. Michael Scott, Dale D. Goble, Frank W. Davis, Donna Brewer
Endangered Species Time Line, Leona K. Svancara, J. Michael Scott, Dale D. Goble, Frank W. Davis, Donna Brewer
United States Geological Survey: Staff Publications
The Endangered Species Act (ESA) is embedded in a web of statutes designed to regulate relationships between humans and other species that stretch back nearly a millennium (Goble, this volume; Goble and Freyfogle 2002). This chapter presents a time line of federal actions taken to protect wildlife beginning with passage of the Land and Water Conservation Fund Act in 1963 (Act of May 28, 1963). Earlier laws to protect wildlife are discussed elsewhere (Goble, this volume). The time line emphasizes federal actions that conserve species at risk of extinction and significant events in the course of implementing the Endangered Species …
Isotope Sourcing Of Prehistoric Willow And Tule Textiles Recovered From Western Great Basin Rock Shelters And Caves: Proof Of Concept, Larry V. Benson, E. M. Hattori, H. E. Taylor, S. R. Poulson, E. A. Jolie
Isotope Sourcing Of Prehistoric Willow And Tule Textiles Recovered From Western Great Basin Rock Shelters And Caves: Proof Of Concept, Larry V. Benson, E. M. Hattori, H. E. Taylor, S. R. Poulson, E. A. Jolie
United States Geological Survey: Staff Publications
Isotope and trace-metal analyses were used to determine the origin of plants used to manufacture prehistoric textiles (basketry and matting) from archaeological sites in the western Great Basin. Research focused on strontium (87Sr/86Sr) and oxygen (18O/16O) isotope ratios of willow (Salix sp.) and tule (Schoenoplectus sp.), the dominant raw materials in Great Basin textiles. The oxygen-isotope data indicated that the willow and tule used to produce the textiles were harvested from the banks of rivers or in marshes characterized by flowing water and not from lakes or sinks. The strontium-isotope …
The Agricultural Productivity Of Chaco Canyon And The Source(S) Of Pre-Hispanic Maize Found In Pueblo Bonito, Larry Benson, John Stein, Howard Taylor, Richard Friedman, Thomas C. Windes
The Agricultural Productivity Of Chaco Canyon And The Source(S) Of Pre-Hispanic Maize Found In Pueblo Bonito, Larry Benson, John Stein, Howard Taylor, Richard Friedman, Thomas C. Windes
United States Geological Survey: Staff Publications
Agricultural productivity estimates suggest that the core area of Chaco Canyon could have sustained only a few hundred individuals. Modern analogues of existing Pueblo populations and their domestic habitations with Chaco structures suggest that Chaco at times had a resident population exceeding 2000 people. These data suggest that maize would have had to be imported to feed permanent residents and those visiting Chaco during ritual–political gatherings and those who participated in the accelerated construction and modification of great houses between AD 1030 and 1130. Comparison of strontium-isotope and trace-element ratios of synthetic soil and natural waters from sites within the …
Unraveling The Geologic History Of The Avalon Terrane In Ma, Erin Nevens
Unraveling The Geologic History Of The Avalon Terrane In Ma, Erin Nevens
Undergraduate Review
No abstract provided.
Field, Petrographic, And Geochemical Characteristics Of Price Creek, Russ Mccormack
Field, Petrographic, And Geochemical Characteristics Of Price Creek, Russ Mccormack
Undergraduate Review
No abstract provided.
Microstructural Analysis Of The Rhode Island Formation, Narragansett Basin, Ma, Elizabeth Connell
Microstructural Analysis Of The Rhode Island Formation, Narragansett Basin, Ma, Elizabeth Connell
Undergraduate Review
No abstract provided.
Implications Of Climate Change And Tephra Accumulation On The Lacustrine Environment In A Volcanic Caldera In Michoacan, Mexico, Tabitha Trosper
Implications Of Climate Change And Tephra Accumulation On The Lacustrine Environment In A Volcanic Caldera In Michoacan, Mexico, Tabitha Trosper
Undergraduate Honors Theses
La Alberca is a volcanic caldera in the Michoacan-Guanajuato volcanic field of central Mexico. The oldest known burial ( ~5000 yrs BP) in the state of Michoacan was discovered beneath prehispanic cliff paintings on the caldera wall. The stratigraphy of fluvial and lacustrine sediments exposed in trenches in the caldera floor record environmental changes that have implications for the type of human use of the site. La Alberca is a closed system with an alluvial fan that extends from the northeastern wall into the lowest southern comer of the caldera floor. Paricutin eruption in 1943-52 and other earlier eruptions deposited …
Sequence Of Tuffs Between The Kbs Tuff And The Chari Tuff In The Turkana Basin, Kenya And Ethiopia, Francis H. Brown, Bereket Haileab, Ian Mcdougall
Sequence Of Tuffs Between The Kbs Tuff And The Chari Tuff In The Turkana Basin, Kenya And Ethiopia, Francis H. Brown, Bereket Haileab, Ian Mcdougall
Geology Faculty Work
No abstract provided.
Tapeworms Of Elasmobranchs (Part Ii) A Monograph On The Diphyllidea (Platyhelminthes, Cestoda), Gaines Albert Tyler Ii
Tapeworms Of Elasmobranchs (Part Ii) A Monograph On The Diphyllidea (Platyhelminthes, Cestoda), Gaines Albert Tyler Ii
Bulletin of the University of Nebraska State Museum (1924–2023)
The main objective of this monograph was a synthesis of the available knowledge on the diversity, systematics, host associations, and biogeography of the Diphyllidea. A thorough review of the literature resulted in the transfer of Diagonobothrium into Diphyllidea as a genus inquirendum. The genus Yogeshwaria was also transferred to Diphyllidea as a synonym of Echinobothrium. Its only species, E. nagabhushani n. comb., is considered to be a species inquirenda. New collections resulted in the description of a new species of Echinobothrium. Type and/or voucher specimens for 32 of 36 valid diphyllidean species (including the new species) …
Geology Of Cat Island, Bahamas: A Field Trip Guide, John E. Mylroie, H. Allen Curran, Deborah Freile, James L. Carew, Neil E. Sealey, Vincent J. Voegeli
Geology Of Cat Island, Bahamas: A Field Trip Guide, John E. Mylroie, H. Allen Curran, Deborah Freile, James L. Carew, Neil E. Sealey, Vincent J. Voegeli
Geosciences: Faculty Publications
See other Smith authored Field Trip Guides of Gerace Research Centre.
Generalized Geologic Map For Land-Use Planning: Fleming County, Kentucky, Daniel I. Carey, Joseph Buckles
Generalized Geologic Map For Land-Use Planning: Fleming County, Kentucky, Daniel I. Carey, Joseph Buckles
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Nelson County, Kentucky, Stephen F. Greb, Bart Davidson, Daniel I. Carey
Generalized Geologic Map For Land-Use Planning: Nelson County, Kentucky, Stephen F. Greb, Bart Davidson, Daniel I. Carey
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Pendleton County, Kentucky, Richard A. Smath, Daniel I. Carey
Generalized Geologic Map For Land-Use Planning: Pendleton County, Kentucky, Richard A. Smath, Daniel I. Carey
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Bracken And Robertson Counties, Kentucky, Richard A. Smath, Daniel I. Carey
Generalized Geologic Map For Land-Use Planning: Bracken And Robertson Counties, Kentucky, Richard A. Smath, Daniel I. Carey
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Carter County, Kentucky, Gerald A. Weisenfluh, Daniel I. Carey
Generalized Geologic Map For Land-Use Planning: Carter County, Kentucky, Gerald A. Weisenfluh, Daniel I. Carey
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Mercer County, Kentucky, Daniel I. Carey, Peter Eclov
Generalized Geologic Map For Land-Use Planning: Mercer County, Kentucky, Daniel I. Carey, Peter Eclov
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Boyd County, Kentucky, Richard A. Smath, Bart Davidson, Daniel I. Carey
Generalized Geologic Map For Land-Use Planning: Boyd County, Kentucky, Richard A. Smath, Bart Davidson, Daniel I. Carey
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Marion County, Kentucky, Daniel I. Carey, Garland R. Dever Jr., Adam Pike
Generalized Geologic Map For Land-Use Planning: Marion County, Kentucky, Daniel I. Carey, Garland R. Dever Jr., Adam Pike
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Pike County, Kentucky, Richard A. Smath, Daniel I. Carey, Bart Davidson, Alex W. Fogle
Generalized Geologic Map For Land-Use Planning: Pike County, Kentucky, Richard A. Smath, Daniel I. Carey, Bart Davidson, Alex W. Fogle
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Lewis County, Kentucky, Daniel I. Carey, Richard E. Sergeant
Generalized Geologic Map For Land-Use Planning: Lewis County, Kentucky, Daniel I. Carey, Richard E. Sergeant
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Breckinridge County, Kentucky, Daniel I. Carey, Daniel L. Kotter, E. Glynn Beck, Joseph D. Buckles
Generalized Geologic Map For Land-Use Planning: Breckinridge County, Kentucky, Daniel I. Carey, Daniel L. Kotter, E. Glynn Beck, Joseph D. Buckles
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Groundwater Quality In Kentucky: Barium, Bart Davidson, R. Stephen Fisher
Groundwater Quality In Kentucky: Barium, Bart Davidson, R. Stephen Fisher
Information Circular--KGS
Barium is a silver-white alkaline earth metal that is not found free in nature because it is highly reactive with sulfate and carbonate. Barium compounds can be naturally occurring or man-made. The most common natural occurrence of barium is in the mineral barite (barium sulfate), which has many uses in industry, such as a filler in the making of rubber, plastic and resin, white pigment, drilling lubricants used in the oil and gas industry, paint, bricks and glass (Agency for Toxic Substances and Disease Registry, 2004). Barium sulfate is very slightly soluble in water and absorbs X-rays, making it an …
Chemical Analysis Of Fish Tissue: Kentucky Army National Guard Wendell H. Ford Western Kentucky Training Site, Muhlenberg County, Kentucky, Steven E. Webb, James S. Dinger, Dennis H. Cumbie
Chemical Analysis Of Fish Tissue: Kentucky Army National Guard Wendell H. Ford Western Kentucky Training Site, Muhlenberg County, Kentucky, Steven E. Webb, James S. Dinger, Dennis H. Cumbie
Information Circular--KGS
Thirty-one analytes were measured in fish tissue taken from largemouth bass, catfish, and bluegill harvested from lakes and ponds in reclaimed and unreclaimed coal-mine spoil of Pennsylvanian age. The spoil area is approximately 7,756 acres created primarily from surface mining, and has been used in increasing intensity since 1969 as a training site by the Kentucky Army National Guard. Four fish were harvested for analysis from the area of unreclaimed spoil that resulted from mining prior to 1977, and 15 fish were harvested for analysis from the part of the training facility that was reclaimed by 1985. Twenty-six analytes had …
Water-Quality And -Quantity Data For Abandoned Underground Coal Mines In Eastern Kentucky, Steven E. Webb, Dennis H. Cumbie, James S. Dinger, Leslie K. Russo
Water-Quality And -Quantity Data For Abandoned Underground Coal Mines In Eastern Kentucky, Steven E. Webb, Dennis H. Cumbie, James S. Dinger, Leslie K. Russo
Information Circular--KGS
Water-quality and -quantity analyses were performed between 1997 and 2003 by the Kentucky Geological Survey under contract from the Kentucky River Authority and the Kentucky Infrastructure Authority to study abandoned underground coal mines as possible water supplies for communities in the Eastern Kentucky Coal Field. The steep terrain of the coal field limits surface-water supplies, and groundwater systems are difficult to locate and often have too low a yield to provide community water supplies. KGS has been working with the Kentucky River Authority, the Kentucky Infrastructure Authority, and local government officials to search for water supplies in abandoned underground coal …
Generalized Geologic Map For Land-Use Planning: Boyle County, Kentucky, Daniel I. Carey, Bart Davidson, Katie Russell
Generalized Geologic Map For Land-Use Planning: Boyle County, Kentucky, Daniel I. Carey, Bart Davidson, Katie Russell
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Generalized Geologic Map For Land-Use Planning: Grant County, Kentucky, Richard A. Smath, Daniel I. Carey, Preston Lacy
Generalized Geologic Map For Land-Use Planning: Grant County, Kentucky, Richard A. Smath, Daniel I. Carey, Preston Lacy
Map and Chart--KGS
This map is not intended to be used for selecting individual sites. Its purpose is to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.