...Figure 9.  Mg versus Mn content of apatite from all the Hagan, Virginia, samples, as well as apatite from the Bishop Tuff (Hildreth 1979 ). ...

...Figure 4 —Exposure of the Deicke K-bentonite at Hagan, Virginia ( Appendix A , loc. 12). The person is standing on the basal contact of the Deicke, which is 1.3 m thick at this locality. E, Eggleston Formation; D, Deicke K-bentonite. ...

.... 27 5 2010 27 8 2010 29 10 2010 © 2011 Geological Society of America 2011 New correlations for both MK-b (Hagan) and KK-b (Vasagård) are proposed on the basis of apatite trace element composition. Carey et al. (2009) successfully correlated the MK-b from Virginia to the mid...

... with DFA shows that all samples are most similar to the lowest subsample in the Hagan, Virginia, type section for the Hagan complex (MB 0.12 m; Fig. 8 ). Herein, the Millbrig is defined on the basis of apatite trace-element composition ( Sell and Samson, 2011b ) of the Millbrig bed in Hagan, Virginia...

... association of Hass (1956) . The Chattanooga Shale of the southern Appalachian Basin is restricted to Alabama, Georgia, Mississippi, Tennessee, and parts of Kentucky and Virginia, as outlined by de Witt (1981 ; Fig. 1 ). “Chattanooga” is also used for Upper Devonian black shales in the subsurface...

... 91.38358°W) and the Hagan section in Virginia (36.28333°N 86.69250°W). Stratigraphic details for the Alabama sections can be found in Quinton et al. (2016 a ) , for the Decorah section in Emerson et al. ( 2005 ), and the Rochester and Hagan sections in Leslie ( 1995 ). All sampled sections span...

... of dinosaur paleobiology and evolution. Previously undifferentiated from a lithostratigraphic perspective, the formation is now subdivided into four new members that include (from base to top) (1) the Rock City Member, (2) the Shields Crossing Member, (3) the Hagans Crossing Member, and (4) the Flag Butte...

.... , 1978 , Grenville basement in the eastern Piedment of Virginia: implications for orogenic models : Geol. Soc. America Abs. with Programs , v. 10 , p. 169 . Hagan , G. M. , and B. W. Logan , 1974 , Development of carbonate banks and hypersaline basins, Shark Bay, Western Australia...

...Cathy J. Busby; Alice K. Koerner; Benjamin L. Melosh; Jeanette C. Hagan; Graham D.M. Andrews Abstract We show here that transtensional rifting along the eastern boundary of the Sierra Nevada microplate (Walker Lane rift) began by ca. 12 Ma in the central Sierra Nevada (USA), within the ancestral...

.... in the Knox formation. 1 Manuscript received, March 8, 1957. 2 Geologist, Kentucky Geological Survey. 3 State geologist, Kentucky Geological Survey. 4 Geologist, Kentucky-West Virginia Gas Company. The writers express their appreciation to the many operators and geologists...

..., as is the laser pointer. Use of the app also avoids the problems of accidently nudging the inclinometer from the true dip angle, and it avoids the misreading of small numbers on the inclinometer. A field test under natural conditions was conducted at Hagan, Virginia (36.7030°, –83.2898°), where the Silurian...

... to accommodate most geological examples, some of which contain major reservoir facies. 1 Manuscript received, October 27, 1983; accepted, May 7, 1984. 2 Department of Geological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061. This paper...

...C.J. Busby; G.D.M. Andrews; A.K. Koerner; S.R. Brown; B.L. Melosh; J.C. Hagan Abstract Eocene to Pliocene paleochannels of the Sierra Nevada (California, USA) were first exploited for gold placer deposits during the California gold rush (1848), and then mapped in surveys more than century ago...

.... (2008 , 2011) , Hagan et al. (2009) , Busby and Putirka (2009) , Putirka et al. (2012) , and John et al. (2012) confirm the presence of subduction-related magmatic arc volcanic rocks that extend, astride the California-Nevada border, at least as far south as latitude 38°N. Those studies have...

..., except for broad uplift and warping. Minor slumping was observed at the base of the rocks of Pennsylvanian age. Campbell (1893 , 1898 ) studied the regional stratigraphy of the Cumberland Plateau. His early work extended from southwest Virginia across eastern Kentucky into northern Tennessee, He...

... velocity in these locations. We used a multilayer feedforward ANN to find relationships between a set of input variables p i and a set of corresponding output (target) variables t i in the form (e.g., MacKay, 1992 ; Foresee and Hagan, 1997 ): (3) t i = f ( p i...

...J. F. Read Abstract Middle Ordovician carbonate ramp and foreland basin facies in Virginia developed under the influence of depocenters (located in Pennsylvania and Tennessee), which appear to have been inherited from the passive Cambrian-Ordovician shelf. Carbonate ramp and basin deposition...

... ; Egger et al., 2009 ; Gorny et al., 2009 ; Hagan et al., 2009 ; Henry et al., 2009 ; Koener and Busby, 2009 ; Schweickert, 2009 ; Busby et al., 2010 ; Henry and Faulds, 2010 ). The Oligocene western Nevadaplano, crossed by valleys running to the Pacific Ocean, was buried in the early Miocene...