site Basic Record 

 SANDY HOLLOW 



From Glen, proceed south on pavement ca. 0.75 mile to the Burma Road. Take this road 7.5 miles 

 to Sandy Hollow. The site extends to the west 1.5 mile and to the north 3 miles. 



The site is characterized by anticlinal folds of various sedimentary strata, including 

 limestone, conglomerate, shale, etc. These folds are exposed at the surface as ridges extending 

 from the north end of the site 3.5 miles to the south end of the site, where they have been 

 eroded by the Big Hole River and buried by sediments. The vegetation present varies from 

 Juniperus scopulorum woodlands, to Artemisia tridentata and Cercocarpus ledifolius shrublands 

 and Agropyron spicatum grasslands. 



COUNTY: Madison 



USGS QUADRANGLE: BLOCK MOUNTAIN 



TOWNSHIP-RANGE: 004S008W SECTION: 27 



QUARTER/ADDITIONAL SECTIONS: Portions of U, 15, 22, 23, 26, 27, 34 and 35 in T4SR8W, and 



2 and 3 in T5SR8W. 



BOUNDING RECTANGLE: S: 452605N N: 452915N E: 1123315W W: 1123508W 



BOUNDARY JUSTIFICATION: The site boundary encompasses an area of extremely high diversity in sedimentary 

 strata exposures and relatively pristine vegetation occurrences on steep slopes. 

 Most of the primary boundary follows ridgelines. The southern boundary is 

 defined by the Burma Road along the Big Hole River. 



APPROXIMATE ACREAGE: 2400.00 



GENERAL RATING: 2 



A G2? community element is present: Juniperus scopulorum/Artemisia tridentata. 



BIODIVERSITY SIGNIFICANCE: 83 



G2? and G3 community elements are present: Juniperus scopulorum/Artemisia tridentata, J. 

 scopulorum/Cercocarpus ledifolius, and Agropyron spicatum/Oryzopsis hymenoides. 



OTHER VALUES: V2 



The site has a high diversity of anticlinal outcrops of sedimentary rocks in a small area. 



PROTECTION URGENCY: P3 



Heavy grazing by cattle will likely cause site degradation. 



MANAGEMENT URGENCY: M3 



Prevent overgrazing on the site. 



CONSERVATION INTENT: 



PROTECTION COMMENTS: 



LAND USE: Cattle grazing has been a primary land use. Since much of the site features steep, rocky and 

 arid conditions, most cattle use has occurred on the drainage bottoms and less steep lower 

 slopes. Many of the mid slopes, upper slopes and ridges have been used primarily for wildlife 

 and watershed values. 



NATURAL HAZARDS: Cliffs and rattlesnakes may constitute hazards. 



EXOTICS: Bromus tectorum likely poses the greatest threat. It is abundant in some areas along Sandy 

 Hollow; however, it does not presently appear to be extending its range on the site. 



OFF-SITE LAND USES: Some surrounding lands are being heavily grazed and increaser species 



(particularly Opuntia polyacantha) are becoming more prominant. The altered 

 vegetation composition of these sites may begin affecting the available seed 

 pool to the Sandy Hollow site over the long term. 



INFORMATION NEEDS: 



MANAGEMENT NEEDS: Control livestock numbers to prevend degradation of site quality. 



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