00471835

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http://onlinepubs.trb.org...trr/1986/1089/1089-009.pdf

https://scholar.google.co...bson&publication_year=1986

Two types of colluvium are present on the Buffalo Creek landscape, an area typical of that part of the Appalachian Plateaus underlain by rocks of the Dunkard Group. Thick deposits of entrenched, diamicton, debris-flow-generated colluvium occur as long fingers in coves (zero-order drainage basins). These deposits range up to 15 m thick but most are 5 to 8 m thick. The deposits are the product of early Wisconsinan slope processes that produced colluvium at at a greater rate than it could be removed by streams. Colluvial fingers are currently well drained because they are deeply dissected by gullies; natural slopes on colluvial fingers are relatively stable. The second type of colluvium is generated as modern slope failures shear bedrock and transport material downslope. Colluvium generated by this process collects up to about 2 m thickness on bedrock benches until failure conditions are reached and the material is transferred to the next lower bedrock-conrolled bench. Colluvium converges on hummocky areas at heads of gullies and is eventually delivered to streams by debris flow or fluvial erosion of failure toes. Different types of modern natural slope failures occur on different surficial geologic units, indicating that surficial geologic setting has a strong influence on failure mechanisms and relative stability of natural slopes.

Publication of this paper sponsored by Committee on Engineering Geology.Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01418818

pp 62-67

1986

Transportation Research Record

0309041090

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Figures (5) ; Maps (1) ; References (7) ; Tables (1)

Colluvium; Debris removal; Deposition; Drainage; Erosion; Failure; Slope stability; Streams; Thickness

Debris

Marion County (West Virginia)

Marion County (West Virginia)

Geotechnology; Highways; Hydraulics and Hydrology; I41: General Soil Surveys

TRIS, TRB

Jul 31 1988 12:00AM

• ANALYSIS OF SLOPE FAILURE IN OVERCONSOLIDATED FISSURED RESIDUAL SOILS: A CASE STUDY
• COMPRESSIBILITY OF COMPACTED FILLS EVALUATED BY THE DILATOMETER
• CONSTRUCTION METHODS TO CONTROL EXPANSIVE SOILS IN SOUTH DAKOTA
• CONTROL OF FROST PENETRATION IN ROAD SHOULDERS WITH INSULATION BOARDS
• DEFORMATION ANALYSES OF FLORIDA HIGHWAY SUBGRADE SAND SUBJECTED TO REPEATED LOAD TRIAXIAL TESTS
• DETERMINATION OF THE CRITICAL THAW-WEAKENED PERIOD IN ASPHALT PAVEMENT STRUCTURES
• DRAINED-STRENGTH PARAMETERS FROM DIRECT SHEAR TESTS FOR SLOPE STABILITY ANALYSES IN OVERCONSOLIDATED FISSURED RESIDUAL SOILS
• DYNAMIC COMPACTION OF LOOSE AND HYDROCOMPACTIBLE SOILS ON INTERSTATE 90, WHITEHALL-CARDWELL, MONTANA
• EXPERIMENTAL ASPECTS OF MERCURY INTRUSION POROSIMETRY
• FACTORS IMPORTANT TO THE DEVELOPMENT OF FROST HEAVE SUSCEPTIBILITY CRITERIA FOR COARSE-GRAINED SOILS
• FLEXURAL FATIGUE STRENGTH OF LIME-LATERITE SOIL MIXTURES
• FROST ACTION PREDICTIVE TECHNIQUES: AN OVERVIEW OF RESEARCH RESULTS
• LOCATING SUBSURFACE GRAVEL WITH THERMAL IMAGERY: PRELIMINARY RESULTS
• MEASUREMENT OF PORE-SIZE DENSITY FUNCTION IN SAND
• PERFORMANCE OF CEMENT-MODIFIED SOILS: A FOLLOW-UP REPORT
• PHYSICAL PROPERTIES OF SOUTHEASTERN WASHINGTON LOESS RELATED TO CUT SLOPE DESIGN
• SATURATION EFFECTS ON CALCAREOUS DESERT SANDS
• THE PRESSUREMETER IN GEOTECHNICAL PRACTICE
• THE SHERMAN LANDSLIDE: A CASE HISTORY
• USE OF ROTATIONAL EROSION DEVICE ON COHESIVE SOILS