Well Study— Sauk III-IV Interval in the American Quasar 16-21A Horse Heaven-state Well, Confusion Range, West-central Utah
Kevin R. Evans, James F. Miller, Benjamin F. Dattilo, 2012. "Well Study— Sauk III-IV Interval in the American Quasar 16-21A Horse Heaven-state Well, Confusion Range, West-central Utah", Great American Carbonate Bank: The Geology and Economic Resources of the Cambrian—Ordovician Sauk Megasequence of Laurentia, James Derby, Richard Fritz, Susan Longacre, William Morgan, Charles Sternbach
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More than 15,000 ft (>4572 m) of Sauk megasequence strata are exposed in mountain ranges across the eastern Great Basin of western Utah (Figure 1; see Miller et al., 2012). The upper parts, Sauk II to Sauk IV, are particularly well exposed in the western desert of Utah, in and around the Ibex area (Figure 2). Division of the Sauk megasequence into four parts follows Miller et al. (2012). This area was also the location of several wildcat wells that were drilled in the late 1970s and early 1980s (Figure 1). From 1991 to 2003, Evans et al. have collected gamma-ray profiles from measured stratigraphic sections in the Confusion, Fish Springs, and House Ranges, as well as the Wah Wah Mountains and sections in eastern Nevada. Profiles from the Ibex area can be correlated confidently with some subsurface gamma-ray logs. As a consequence, key stratigraphic markers exposed in measured sections can be identified in well logs, and conversely, well logs can be used to help delineate the distribution of facies and large-scale structures.
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Great American Carbonate Bank: The Geology and Economic Resources of the Cambrian—Ordovician Sauk Megasequence of Laurentia
The Great American Carbonate Bank (GACB) comprises the carbonates (and related siliciclastics) of the Sauk megasequence, which were deposited on and around the Laurentian continent during Cambrian through earliest Middle Ordovician, forming one of the largest carbonate-dominated platforms of the Phanerozoic. The Sauk megasequence, which ranges upwards of several thousand meters thick along the Bank's margin, consists of distinctive Lithofacies and fauna that are widely recognized throughout Laurentia. A refined biostratigraphic zonation forms the chronostratigraphic framework for correlating disparate outcrops and subsurface data, providing the basis for interpreting depositional patterns and the evolution of the Bank. GACB hydrocarbon fields have produced 4 BBO and 21 TCFG, mostly from reservoirs near the Sauk-Tippecanoe unconformity. The GACB is also a source of economic minerals and construction material and, locally, serves as either an aquifer or repository for injection of waste material. This Memoir comprises works on biostratigraphy, ichnology, stratigraphy, depositional facies, diagenesis, and petroleum and mineral resources of the GACB. It is dedicated to James Lee Wilson who first conceived of this publication and who worked on many aspects of the GACB during his long and illustrious career.