Description: The North Carolina Process Points feature class contains the initiation point locations of slope movements in North Carolina.This layer includes slope movement type, location, dimensions, dates, geologic (rock and soil), geomorphic, hydrologic, and other site data for individual slope movements where known. Data points are color-coded by type of slope movement (process). Information shown in this data layer incorporated or considered the work of Michalek (1968), Mills (1996), Pomeroy (1991), and Otteman (2001).
Description: This feature class outlines the areal extent of relatively recent, individual slope movements. NCGS staff delineated the outlines from field investigations, and features visible in 1951 and 1982 aerial photography, and 1984, 1993, 1998, 2001 and 2007 orthophotography. Sources of information used to compile November 3-7, 1977 debris flow track into this feature class included Pomeory (1991) and Otteman (2001), augmented by the NCGS's field investigations and inspections of 1982 and 1984 aerial photographs. Outlines are shown only for slope movements generally mappable at a scale of 1:24,000 and that could be identified on aerial photography.
Description: These map units show the areal extents of significant volumes of earth, debris and rock fragments that have accumulated as a result of past debris flows and debris slides and, to a lesser extent, rock falls and rock slides. Debris flow deposits mainly occur in valleys and can grade upslope into debris slide, rock fall, and rock slide deposits nearer steep source areas. The mapped slope movement deposits are typically composite features that formed as a result of multiple slope movement processes and events of various ages from prehistoric to modern times. The bulk of the deposits are likely prehistoric in age, but their ages have yet to be verified by modern age-dating techniques. These deposits consist of heterogeneous mixtures of clay, silt, and sand particles with gravel- to boulder-sized rock clasts in various stages of weathering and decomposition. Areas mapped as slope movement deposits met two or more of the following criteria: 1) exhibited an elongate, lobate or fan shape, or other landform characteristic of a slope movement deposit, visible at a scale of 1:7,500 using the LiDAR DEM; 2) had an adequate upslope source area where past slope movements could have initiated; and/or, 3) were verified in the field to contain gravel- to boulder-sized clasts or other textures and depositional structures that characterize deposits produced by slope movements (i.e. matrix supported or imbricated clasts, or scour and fill structures). Many narrow stream valleys likely contain slope movement deposits that are not feasible to map at this scale.
Field_Ver
(
type: esriFieldTypeString, alias: Field Verified, editable: true, nullable: true, length: 35, defaultValue: Not field verified, modelName: Field_Ver
, Coded Values:
[Field verified by NCGS: Field verified by NCGS]
, [Field verified by Data Source 1: Field verified by Data Source 1]
, [Not field verified: Not field verified]
)