... 8 September 2022 © Seismological Society of America Importantly, both Abbott (2001) and Stirling et al. (2002) showed that slightly amplified recorded PGAs at Lovejoy Buttes means that site conditions do not appear to explain the preservation of the PBRs. Rood et al. (2022...

... deposition of the Ogallala Formation farther east and suggesting that the western limit of Ogallala deposition was east of the Apishapa Dikes. In far southeastern Colorado, the Two Buttes lamprophyre was emplaced at 36.8 ± 0.4 Ma and yields a Late Oligocene AHe date of 27.1 ± 4 Ma. Here, the Ogallala...

... well is the result of erosion during post-Benton time. TABLE III THICKNESS (IN FEET) OF CRETACEOUS FORMATIONS IN KEY WELLS   (1) (2) (3) (4) (5) (6) (7)   Morgan 1 Pinney 1 Duthie 1 2 Jones 2 “Slim Butte” A gate 15-1 Kinion 1 Ground elevation 3,992...

... age, based on their occurrence with ammonites ( Popenoe, 1983 ; Popenoe and Saul, 1987 ). The Musty Buck Member of the Chico Formation crops out primarily east of Chico, in Chico and Butte creeks, Butte County ( Fig. 1 ) and is a conglomeratic shoreface sandstone with dominantly molluscan...

... stratigraphically between the newly named Exeter Sandstone and the Dakota Sandstone. He briefly mentioned the existence of the formation in Oklahoma. Darton ( 1905 ) visited the Two Buttes area of southeastern Colorado and observed that the area’s stratigraphy includes the Exeter Sandstone, Morrison Formation...

..., and fossils found at various places along the railroad. Timothy Abbott Conrad’s report of marine fossils is historically important because it was the first published report of Pennsylvanian invertebrate fossils from North America. [email protected] © 2015 History of Earth Sciences Society 2015...

... member of the Chico Formation was named by Russell et al. (1986) for outcrops in the vicinity of the hamlet of Pentz, Butte County, northern California. Squires and Saul (1997) reviewed the stratigraphy of the Pentz Road member and reported it to consist of deposits of early Campanian age...

...-forming quantities. The analysis of two large limestone bodies in the Rail Cabin Member of the Vester Formation exposed near Graylock Butte, Grant County, Oregon, fosters the reconstruction of the paleoenvironmental setting of these unusual Halorella deposits, resulting in the first recognition...

... Devonian to earliest Mississippian. Near the Northwest Territories boundary at Macmillan Pass ( Fig. 1 ), conodont collections from the Portrait Lake Formation have ages ranging from late Pragian to early Tournaisian ( Abbott 1983 ; Irwin and Orchard 1991 ). Barite horizons in the Earn Group between...

... (SE ¼, SE ¼, sec. 4, T. 17 N., R. 24 E.). Stratigraphically, the locality is about 32 m below the Sonsela Sandstone Bed in the Monitor Butte Member of the Chinle Formation of Late Triassic age (Late Carnian-Early Norian) ( Fig. 1 ). The unit now correlated with the Sonsela was erroneously attributed...

...). The overlying Tradewater group (Wanless, cited in Weller, 1940 , pp. 39-42; Wanless, 1956 , p. 4) is represented in the area of Figure 2 only by Grindstaff and Delwood sediments that locally contain prominent sandstones of the same names (Butts, 1925 , p. 44; Weller, 1940 , p. 40). The Tradewater...

..., the continuity of the slab and its 3-D geometry and structure. Fig. 4. ( a ) Location of leg A, part of the Canada Northwest Experiment (CANOE; Mercier et al. 2008 ), which is coincident with line 1. Triangles represent the teleseismic station locations. YK, Yellowknife; NB, Nahanni Butte. ( b...

... assemblages or units — including the Lake George, Fairbanks–Chena, and Butte assemblages in the Yukon–Tanana Upland, and the Totatlanika Schist Formation, Healy schist, Wood River assemblage, and Jarvis belt in the northern Alaska Range — is indicated by quartz-rich compositions of metasedimentary rocks...