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Exposures of the most richly fossiliferous Lower Ordovician strata in the United States occur about 50 mi (80 km) west of Delta, Utah, and extend over an area 6 by 8 mi(15 by 20 km). These rocks form low-lying hills in the southern part of the House and Confusion ranges (Fig. 1) and are reached by paved U.S. 6–50, which passes along the northern edge of the Ibex area, named for a small ranch abandoned in the 1930s. The area is neither populated nor fenced and isused primarily for winter sheep grazing under administration of the U.S. Bureau of Land zones useful to Ordovician students throughout the world. Management, which maintains graded dirt roads that lead to within easy walking distance of most outcrops. There is no water.

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