Description: Feature class and cartographic representations for bedding, cleavage, foliation and lineation, corresponding to Section 6 , Section 7 , Section 8 , and Section 9 of the FGDC Digital Cartographic Standard for Geologic Map Symbolization.
Description: Feature class and cartographic representations for bedding, cleavage, foliation and lineation, corresponding to Section 6 , Section 7 , Section 8 , and Section 9 of the FGDC Digital Cartographic Standard for Geologic Map Symbolization.
Description: Contains the locations of field stations where geologic information was recorded, including structural data, rock description, photograph numbers, etc. The associated attribute table contains all data from which the other shapefiles are derived; and also includes some data and observations that are NOT portrayed on other shapefiles.
Description: Feature class and cartographic representations for bedding, cleavage, foliation and lineation, corresponding to Section 6 , Section 7 , Section 8 , and Section 9 of the FGDC Digital Cartographic Standard for Geologic Map Symbolization.
Description: Short line segments drawn from air photo imagery (at scale 1:1,000) on prominent straight lineaments defined typically by narrow gaps within bedrock exposures, and straight linear trends visible in cliff and quarry outcrops. These likely represent major fractures or joints in the bedrock. The segments are extended slightly beyond the observed feature for visibility. Nevertheless, viewing at 1:5,000 scale and greater (more detailed) may be necessary. Typically, irregular and discontinuous gaps visible in the field and in air photo imagery were not drawn because they tend to be so short that they cannot be portrayed at this scale. Longer segments drawn in broader gaps between otherwise continuous outcrop trends may represent through-going fracture sets. No significant offset was apparent across the various planar structures, and thus, no faults are depicted. However, it is likely that at least some movement along some fractures has occurred.
This is by no means an exhaustive representation of potential fracturing in the park. Nevertheless, the fracture trends shown may have significance to bedrock groundwater issues and may relate to the orientation of larger topographic trends such as the Mound Creek valley.
Description: Contains outlines that approximate the limits of nearly 3000 bedrock exposures in and adjacent to the park. These were drawn from field mapping using air photo imagery supplied by DNR (BlueMoundsStPark.tif), augmented locally by LiDAR imagery (in tree-obscured areas) and other air photo data sets available through GIS on-line. The outlines of LiDAR-based outcrops are speculative, especially along the bluff that marks the east and southeast sides of the park. The greatest outline detail attainable from the imagery was scale 1:1,000. Outlines locally enclose clusters of multiple, closely spaced exposures. Outlines are approximate and many small outcrops likely exist that are not included. Some outcrops drawn may actually be boulders. Obviously, not all outcrops shown were visited during field work.
In general, outcrops of pale purple and pink, trough cross-bedded units are more prominent than those composed of red and dark purple, more thinly planar-bedded units. Outcrops of the pale units tend to be equidimensional and polygonal; with blocky joints, comparatively high topographic expression, and pale color apparent in air photographs. In some locations, these exposures are segmented into blocks by frost-heaving along joint surfaces. By contrast, the red units tend to form long, sinuous, and narrow outcrops that are low to the surrounding land surface and typically dark colored in air photographs. Locally the contact between the two types of units is visible on air photos. These differences in outcrop morphology are related to contrasting bed thickness - pale colored units are thickly bedded and massive; red units are more thinly bedded. A likely explanation is that bedding plane fractures and more closely spaced vertical fractures in red units allowed glaciers to more effectively pluck and remove fragments
Name: Blue Mounds State Park Bedrock Geologic Units
Display Field: label
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: The bedrock geology is divided here primarily using colors (pale pink, pale purple, red and dark purple). The rationale is this: color is the most obvious attribute visible on outcrops, and in most places, other geologic characteristics are consistent within these color variants. A forth undifferentiated unit is added to denote poorly exposed areas.